Enterprise Forever

:UK => Hardware => Interface => Topic started by: pear on 2015.April.21. 10:13:42

Title: Enterprise All-In-One interface
Post by: pear on 2015.April.21. 10:13:42
I saw a post about this title, but I do not know Hungarian.
Can I ask for a translation, although this one  post (http://enterpriseforever.com/hardver/enterprise-all-in-one-interface/msg294/#msg294) ?

For now build single blocks, but there is nothing to prevent them later to combine into a single project.
Are there any details, I should know about connecting to Enterprise more than one card at the same time ?
I would add information about switching memory banks, addressing external devices and what exactly are additional signals on the edge connector (EC0-EC3, /EXTC, SA0-SA2).
Title: Re: Enterprise All-In-One interface
Post by: lgb on 2015.April.21. 17:21:00
Well, I am not a great translator (or especially good in English ...) at all, but I try, something similar this would be in English:

Excuse me if some is bored or flustered by me, but now there are the features (probably sometimes including my own personal wishes as well) for the "all-in-one" interface what I imagined after reading the forum for a while:

1.) hyper-mega-super Zozosoft style HDD controller with driver programs + (hopefully) EXDOS 2.006
2.) Floppy controller WD1770/72 or the MCU based solution from Tigrian which can handle 3.5" DSHD disks too (well at least it works with 8/16MHz clock, but I am "not against" the multiclock solution can be seen at Garfield either :) )
3.) Bus expander: 1-3 SBB compatible card connector
4.) (at least) 1MByte RAM, (at least) 512K flash ROM (it can be reprogrammed without extra hw stuff, right?)
5.) Making machine turbo'ish (ok, here I am a bit lost. In my opinion there can be a part at one corner of the PCB producing switchable system clock 8-12-16 MHz, which is driven back to the machine then where the system clock would have come out. In this case the original quartz must be avoided. But sorry if my idea is dumb)
6.) Mészáros' RS232/mouse serial card compatible
7.) Battery backed clock/calendar (ZozoTools, Exos x.x and exdos 2.006 compatible)
-------
8.) Spectrum emulator
9.) 8bit DAC (and/or ADC?)
10.) USB port
11.) "Toronyóra lánccal" -> errr ... hard to translate saying :D "tower clock with chain" meaning some wants everything

So here it goes: you can argue (or you can waggle your head about the lameness of the author of this post...)
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.21. 18:25:35
Thank you and do not worry. I do not know English well enough to judge you. But now I understand much more than the Hungarian :)
Ok, well what we have here ?
Points 2 and 8 have already included :) Now I'm working on the third.
The plan is to have 4 and 1, and exactly IDE with CF card reader. I don't know what means "hyper-mega-super" :)
Item 5. Is it safe? These computers have their years.
Points 6, 7 and 9. Easy to do, but RS-232 and DAC may be expensive. Only UART controller costs about $ 15.
Item 10. Full USB or enough RS232-to-USB converter ?
Item 11. I don't idea what is it :)

To sum this all-in-one must be very expensive.
Perhaps much more expensive than the Enterprise itself.
Maybe not everyone needs everything ?
I have an idea for a modular and yet this version, I will hold. :)
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.21. 19:49:47
It is a wish list from a non professional user. Some are meaningless some are impossible.
And todays some are obsolete (IDE, RS232...).

My today wish list :-)
- EXDOS with four speed turbo for HD and turbo DD disks
- 512K Flash ROM, and least 2x512K SRAM (most easy part, address decoding need only one 74HCT138 :-) )
- standard MC146818 compatible RTC
- built in Bus Extender, follow the Hungarian type (http://gafz.enterpriseforever.com/Hardware/PCB/Picture/bus-1.gif). With few slots for future (or old) expansions. I suggest holes for both Edge and IDC connectors, then the user can decide.
- Spectrum Emulator 5.0 :-) I have ideas for make more better... probably try add SP128 mode...
- external 4x8 bit DAC, connected to sound input lines. It is already supported by DTM player
- AY chip, connected to sound input lines. Will be usefull for Spectrum emulator.
- SID chip, connected to sound input lines. For the SID Player.
- will be great if these 3 sound devices can be used in same time :-) (+Dave)
- optionaly if you want a own mass storage device: CF card in memory mode, and mapped as memory (then data transfer can be done with LDIR) But today exist a gret SD Card interface for the Enterprise.
- optionaly: http://gafz.enterpriseforever.com/Hardware/PCB/Picture/coprocessor.gif (http://gafz.enterpriseforever.com/Hardware/PCB/Picture/cooprocessor.gif) :-)
- everything can be used up to 10MHz machine!
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.21. 20:09:22
what exactly are additional signals on the edge connector (EC0-EC3, /EXTC,
These are the external color inputs for the Nick chip. For example sprite hardware. Currently don't use anything.

Quote
SA0-SA2
These are the Slot Address lines for the planned but never released official expansion unit.
The original concept: each slot have a different slot address, and the cards use these for memory and I/O address decoding. Plug and Play from 1985 :-D
But unfortunatelly the official unit not released, and the documents also not published. Then all expansion use own fixed address decoding, and not use these signals. Only the original EXDOS card use this system. This is the reason why a lot of ICs used in the original EXDOS card.
The clone EXDOS card also using fixed addresses, and the softwares which handling directly the floppy also use the direct addresses.
My conclusion forgot these then you can make more simple EXDOS schematic.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.21. 20:14:05
In that case, the next module will be RAM, Flash, and clock in one. :)
Will I find somewhere schematics ?

What is this "four speed turbo" ? WD1772 is based on ?
I have yet a few PCB for EXDOS which I can cut :)

My Bus Extender (based on Hungarian) with IDC connector is ready.
Title: Re: Enterprise All-In-One interface
Post by: lgb on 2015.April.21. 20:34:27
I would like (most of Zozo's stuff, not mentioning them again (hopefully):

* SD card (well, we have the "standard" cartridge now, but if "all-in-one" let's name that way, so no need for other components to buy/use!)
* Ethernet solution, possibly something like wiznet w5300 chip (MSX/SymbOS world seems to be interested in wiznet chips as well)
* general SPI bus solution (also usable fog eg SD-card) so other SPI slave devices can be connected and used (even like MPEG audio codec IC over SPI to be able to play MP3s, the SymbOS demos on MSX use something like that, of course a Z80 can't decode MP3 in real time ..... and those ICs are not so expensive able to work in more primitive mode too, ie simple sample playback, etc - but numerous examples exist even kind of odd things with SPI)
* DAC maybe configurable to 16 bit mode as well over only 2*8? :D (oh, and about some "codec ICs" may do functions like plain DAC and hardware decoding MP3/vorbis/etc as well)
* even more odd idea: USB host to be able to use mass-storage class devices at least (pen drives, even HDDs with converters if some really wants, digital cameras and cell/smart phones using this protocol etc). Sometimes even sounds better than having SD card interface :)

I am not sure about these:

* some PS/2 (?) mouse interface? - maybe easier to do externally to be able to use PS/2 mouse and have boxsoft-like (compatible) signaling, etc
* some PS/2 (?) keyboard interface (it's a bit complex topic and no really usable solution exist still, it seems which is kinda sad in my opinion)

What I (personal opinion!) can live without:

* IDE/HDD: SD card is big enough for "retro", much more easy to handle etc
* floppy/FD: I never liked floppies
* serial/UART stuff

Personally I think network (ethernet) is even more important than SD, ie network storage then, instead of SD card which should be swapped between EP and the PC all the time :) Especially if some wants to develop something with rapid testing cycles.

And BTW, a PCB between Z80 and its socket so we can "convert" I/O port accesses. For example real Spectrum emulator, not with the NMI-when-keyboard etc. Ok, this is another topic already :)
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.21. 20:50:35
In that case, the next module will be RAM, Flash,
Just use 74HCT138.
A-B-C inputs: A19,A20,A21
G2A&G2B: MREQ
G1: RFSH (don't make chip select at refresh phase)
Outputs are valid for 8x512K areas.
Y0 and Y7 are colflicting with the onboard ROM and RAM, others can be used.

I suggest (when combine with EXDOS), use Y1 for the Flash, it is for the 20-3Fh segments, then EXDOS can be putted to 20-21h where normaly placed.
Y2, Y3 (or more :-) ) for the SRAM chips.

Quote
and clock in one. :)
RTC card. (http://gafz.enterpriseforever.com/Hardware/PCB/Picture/Clock&Calendar-1.jpg)
Today can be used Dallas RTC chips with built in clock generator and battery, then the most of components not needed.

Quote
What is this "four speed turbo" ? WD1772 is based on ?
http://gafz.enterpriseforever.com/Galery/Bovitmenyek/Picture/Ep-m17.jpg
http://gafz.enterpriseforever.com/Galery/Bovitmenyek/Picture/Ep-m15.jpg

Yes need a WD1772-PH 02-02.
The WD clock switched 8/10/13.3333/16MHz if you have a 1.2M drive jumpered as 300 rpm, or 8/9.6/10/16Mhz if you have a 1.2M drive jumpered as 360 rpm.
8MHz the normal clock for DD disk and 300 rpm drives
9.6MHz for 360 rpm drive and normal DD disk
10Mhz for turbo DD on normal 300 rpm drives. 13 sectors/track formating. (I have more than 20 years old disks with this format and still working :-) )
13.333MHz for 300 rpm jumpered 1.2M drive use HD disks
16MHz for 1.44M drives and HD, and 360 rpm jumpered 1.2M drives and HD

Clock can be switched on I/O port.
The turbo DD with 10MHz also possible with WD1770

Using HD disks need least 6MHz machine.

(Atari ST users also do the 16MHz for HD trick)
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.21. 21:02:29
At what address I/O set the registry permission to write to flash ?
Or directly without any protection by /WR signal ? :shock:

WD1772-PH 02-02 is on board :)
My EXDOS in version for FlexiBridge.
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.21. 21:04:57
* SD card (well, we have the "standard" cartridge now, but if "all-in-one" let's name that way, so no need for other components to buy/use!)
But need to design same with the existing one, or agree with the developers.

But need a terrible surface mounted components which can't handle at home with any user :-(

Quote
* Ethernet solution, possibly something like wiznet w5300 chip (MSX/SymbOS world seems to be interested in wiznet chips as well)
I know someone working on it :-)
For these are the expansion slots...

Quote
* even more odd idea: USB host to be able to use mass-storage class devices at least (pen drives, even HDDs with converters if some really wants, digital cameras and cell/smart phones using this protocol etc). Sometimes even sounds better than having SD card interface :)
I think the USB too complicated thing with lot of protocols need to be implemented. Then will be slow compared with direct SD or CF cards. I did not feel it necessary to.



Quote
* some PS/2 (?) mouse interface? - maybe easier to do externally to be able to use PS/2 mouse and have boxsoft-like (compatible) signaling, etc
You can't done as compatible on external card. Need to connect to joy port, or inside the machine.

Quote
* some PS/2 (?) keyboard interface
Also possible inside the machine. But why? Todays are available new membranes.

Quote
* floppy/FD: I never liked floppies
I'm love floppies! :ds_icon_cheesygrin: The tak-tak-tak... needed for the retro feeling!

Quote
* serial/UART stuff
I don't know reason for this at 2015 :twisted:
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.21. 21:12:37
Or directly without any protection by /WR signal ? :shock:
Just directly. Flash chips have a built in protocols for the protection. But possible add WR jumper for maximum safe.
AMD or Macronix 29F040 chips recommended, these are well tested with Enterprise.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.21. 21:19:13
OK, then let's do it !
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.April.21. 21:34:58

* even more odd idea: USB host to be able to use mass-storage class devices at least (pen drives, even HDDs with converters if some really wants, digital cameras and cell/smart phones using this protocol etc). Sometimes even sounds better than having SD card interface :)

---------------------

Personally I think network (ethernet) is even more important than SD, ie network storage then, instead of SD card which should be swapped between EP and the PC all the time :) Especially if some wants to develop something with rapid testing cycles.


I have an All-in-One (https://sites.google.com/site/interface1bis/) solution for the Spectrum that uses a USB host cable (Spectrum-PC link) for storage and also for networking(basic FTP) to the World of Spectrum web page. Who doesn't have a modern computer at the side of the Enterprise?
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.21. 21:41:16
I rather not undertake this project.
It requires a lot of knowledge, which unfortunately do not have.
From what I know If1Bis was created several years. I have this one - a great thing. :)
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.April.21. 21:44:25
Yes, a great but complicate thing......
Title: Re: Enterprise All-In-One interface
Post by: lgb on 2015.April.22. 00:24:08
Not so much EP related, just maybe the idea: ZX Spectrum related maybe something similar "multiple purpose" solution: https://sites.google.com/site/interface1bis/ (https://sites.google.com/site/interface1bis/)
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.22. 00:44:49
Not so much EP related, just maybe the idea: ZX Spectrum related maybe something similar "multiple purpose" solution: https://sites.google.com/site/interface1bis/ (https://sites.google.com/site/interface1bis/)
It is linked few comments earlier :-D
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.22. 00:47:02
Anyway this is too modern for my taste :oops: I like the things what I also can build.
Title: Re: Enterprise All-In-One interface
Post by: lgb on 2015.April.22. 01:11:34
It is linked few comments earlier :-D

Ah, sorry, I was slow, it seems :D

Quote
Anyway this is too modern for my taste :oops: I like the things what I also can build.

Usually I agree, however there can be the "neat level" when it does not count if it's that good, anyway. And yes, unlike you, I am lazy as well :-P
Title: Re: Enterprise All-In-One interface
Post by: lgb on 2015.April.22. 01:26:49
But need to design same with the existing one, or agree with the developers.

Indeed.

Quote
But need a terrible surface mounted components which can't handle at home with any user :-(

It's a question in general, what kind of really good all-in-one solution can be created with avoiding SMD parts, programmable logic etc. So all the things which are hard for an average hobbyist maybe.

Quote
(Ethernet) I know someone working on it :-)

Yes, but the problem is more like "too much needs and too many of discrete projects", it's not so easy to connect millions of extensions, maybe the "all-in-one" solution can combine many of these, that was the reason I mentioned.

Quote
I think the USB too complicated thing with lot of protocols need to be implemented. Then will be slow compared with direct SD or CF cards. I did not feel it necessary to.

It depends. If you need to create it from discrete parts, only logic ICs, it would be quire hard :) However if some MCU is involved in the design, it can be not so hard, also what I mentioned already there are even USB controller specific ICs which help a lot for the user to avoid the complexity to do the bulk of the USB related issues by themselves. Maybe CH375 or similar IC seemed quite handy here, but now I can find only web pages in Chinese (indeed it is Chinese, but for an English specification at least), it seems the English page is removed and/or replaced with Chinese one now, ouch.

Also, please note, that it was more like a "dream wish list" not so much a realistic one in every details :)

Quote
You can't done as compatible on external card. Need to connect to joy port, or inside the machine.

True, but I also thought as an internal all-in-one solution not only external solution, thus mentioning keyboard and mouse too.

Quote
Also possible inside the machine. But why? Todays are available new membranes.

Maybe I am just too much lazy again and used to PC keyboards, even my old favourite (C64 keyboard) feels too "alien" for me nowdays compared to the daily used PC keyboards, especially better ones. Well, that's my problem, yes :(

Quote
I'm love floppies! :ds_icon_cheesygrin: The tak-tak-tak... needed for the retro feeling!

Probably, personally I still hate floppies whatever retro or not, but again this is kinda personal point here :)

UPDATE:

Found the USB stuff: http://www.8bit.8u.cz/Files/CH375/CH375DS1.pdf (http://www.8bit.8u.cz/Files/CH375/CH375DS1.pdf)

Ok, it's still not DIP, but 28 pin SOP package is till (?) better than a 100000 pin monster QFP or even BGA :) It seems it has parallel bus interface, and command set to implement storage protocol without too much actual details but honestly I am dumb with USB just a quick peek on the document what I've done ...
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.22. 13:01:29
Are there any details, I should know about connecting to Enterprise more than one card at the same time ?
Nothing any special. Just needed each card have a different address space decoded.
For example one full config:
http://enterpriseforever.com/hardver/milyen-ep-konfigod-van/?action=dlattach;attach=3834;image
http://enterpriseforever.com/hardver/milyen-ep-konfigod-van/?action=dlattach;attach=3841;image

- 1MB DRAM card
- 6x EPROM/SRAM card
- EXDOS clone
- RS232 card
- IDE card
- RTC card
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.22. 13:17:57
Today, collect materials for card design:
- 512 KB Flash ROM
- up to 2 MB SRAM (4x 512K x 8bit)
- RTC

I found the original parts available MC146818, but if there are other newer and more available, I will use them willingly.
Is there a list of counterparts, do I need to do some research yourself ?
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.22. 13:27:14
I found the original parts available MC146818, but if there are other newer and more available, I will use them willingly.
Is there a list of counterparts, do I need to do some research yourself ?
I wrote about it here. (http://enterpriseforever.com/hardware/real-time-clock-with-a-msm6242b/msg42550/#msg42550)
Dallas DS12x887x recommended, then not needed external battery and clock generator circuits. Only the address decoding.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.22. 13:31:14
IDE card design is actually ready, but I have changed a little idea of FlexiBridge (I want to be more compatible with the classical single bridge).
One channel (master/slave) with CF slot.
512KB flash on memory card is enough?
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.22. 13:49:03
512KB flash on memory card is enough?
Yes.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.23. 06:37:53
@gflorez:
No satanizar, por favor, mi trabajo ;) Estoy empezando a preocuparse por la Inquisición :)

Of course, I'm joking (I hope that the translator did not spoil the sense of what I mean).
A IDE module is not built in one and a half day, but I drew it for about a week.
On average, one project will take me about 1-2 weeks time.
From the beginning to collect information about the interface, then the availability of components, the prices (at once at this stage).
Then gather notes directory components, usually worked up a bit of the original design and draw a diagram.
Designing the PCB takes about 3-5 days, depending on the complexity and density of the circuit.

In the case of IDE nothing I transformed, and all components are still available, so it was faster.
And today I'll draw a diagram RFC card (RAM-Flash-real time Clock).

@all:
Most cards have a data bus connected to a computer through the buffer 245.
Should I separate the memory data bus by buffer ?
It seems to me that, yes, but I have doubts about the same buffer.
Maybe I will apply a series of ACT (fast and energy-efficient).
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.April.23. 08:27:03
Only a week is impressive.....
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.23. 08:32:06
As a friend of mine says: "I'm done 40 years, I can not waste time" :)
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.23. 10:47:50
First preview of components placement for RFC module card (RAM-Flash ROM-real time Clock).
PCB fit 2.5 MB RAM and 1 MB Flash ROM (pity to waste place ;) ).
5 x AS6C4008
2 x AM29F040
1 x DS12C887

Used segments:
10-1F: second Flash ROM (upper half)
20-3F: first Flash ROM
40-DF: RAM
E0-EF: second Flash ROM (lower half)
Flashes have separately write-protect jumpers.
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.23. 11:27:12
Should I separate the memory data bus by buffer ?
It seems to me that, yes, but I have doubts about the same buffer.
The problem, especially if you allocate all address space :oops:
Without buffer, then just left empty some sockets if needed to cooperate with other existing expansion.
With buffer it is still send the FFh to the bus when the socket is empty and make a collosion on the data bus. At this mode need a enable jumpers for each socket which is can disable the bus drive and the chip enable (then not needed really remove the chip).

Anyway I really don't know more ROM programs than 512K :oops: I suggest the secondary ROM socket with jumpers for FLASH/SRAM mode.

Other suggestions which is make the address decoding more complex :-)

For using lot of memory needed my Quick Memory test. One reason the original EXOS test testing megabytes of memory for minutes at each reset... will be better done at few seconds :-D
Another reason: the original EXOS only find ROM extensions at x0h segments and in the cartridge (04-07h). My test can find ROMs at any segment. (And also possible simulate ROMs in RAM).
The best way is using my unofficial upgarded EXOS versions (then some EXOS bugs also fixed), but need to dismantle the machine, and modifiy the ROM socket for 64K.
Other way use the cartridge version. This is needed to placed to 04h for the EXOS can find it.

Then will be good idea if 64K of the Flash ROM can be moved to 04-07H (cartridge area) with a jumper settings. (for example the 24-27h moved) Then possibel to run cartridge version of the Quick Test with untouched machine and without additional cartridge.

Other suggestion for EP64: unfortunatelly most of EP128 programs don't allocate the memory from the EXOS :cry: using direct segment address from F8h-
Then needed to put 64K memory expansion to F8-FBh for make EP64 compatible with EP128. Then the suggestion are EP64 jumper which is move 64K of one SRAM to this area.

Maybe I will apply a series of ACT (fast and energy-efficient).
It is good idea! (I using HCTs from early '90s)
Title: Re: Enterprise All-In-One interface
Post by: lgb on 2015.April.23. 13:33:58
Quote
Other suggestion for EP64: unfortunatelly most of EP128 programs don't allocate the memory from the EXOS :cry: using direct segment address from F8h-
Then needed to put 64K memory expansion to F8-FBh for make EP64 compatible with EP128. Then the suggestion are EP64 jumper which is move 64K of one SRAM to this area.

But isn't it the problem with turbo, that the 64K extension panel in EP128 is often too slow and must be replaced? Then with "tons" of memory I would be more happy to remove the internal RAM expansion, or making the all-in-one interface an internal thing, basically placed instead of the internal memory expander PCB. Well, or maybe this project's goal is for having an external interface more, and not internal modification too much ......
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.23. 14:08:24
With buffer it is still send the FFh to the bus when the socket is empty and make a collosion on the data bus. At this mode need a enable jumpers for each socket which is can disable the bus drive and the chip enable (then not needed really remove the chip).
You're right. I have to add a configuration jumpers.

Anyway I really don't know more ROM programs than 512K :oops: I suggest the secondary ROM socket with jumpers for FLASH/SRAM mode.
OK. As a second ROM can be pseudo-ROM emulated by SRAM.
Here, you probably will need to do a registry that has the ability to lock the write.
Otherwise, when the computer will know that it is a ROM ?

Other suggestions which is make the address decoding more complex :-)
I have to think about it and figure out whether the logic will fit on a single chip GAL.
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.23. 14:22:58
Otherwise, when the computer will know that it is a ROM ?
My Quick Test first check the ROM header and if it is present, then the RAM test not run on this segment. Than any normal RAM segment can be used for ROM simulation.
Similar thing, the RAMDISK also can be preserved.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.23. 19:01:21
Without significantly complicating can do this:
00-03: onboard ROM
10-13,20-23,30-33,40-43,50-53,60-63,70-73: Flash ROM (standard ROM extensions segments)
80-83 (jumper switched on 04-07): Flash ROM
80-83: RAM as ROM when Flash switched to cartridge segment
90-93,A0-A3,B0-B3,C0-C3,D0-D3,E0-E3,F0-F3: RAM as ROM (standard ROM extensions segments)
9C-9F,AC-AF,BC-BF,CC-CF,DC-DF,EC-EF: unused
F8-FB: internal RAM (jumper mapped on external RAM)
FC-FF: onboard RAM
others not listed above: RAM (2.5MB - 64KB at F8-FB)

It seems strange, but such an arrangement does not require a complicated method of addressing.
Simply connect the address lines A18-A20 of Enterprise to address lines A16-A18 of the memories, and decode chip addresses with the A16, A17 and A21.
Wasted only 64 KB of RAM, if internal memory expansion is installed.
What do You think about it ?
Title: Re: Enterprise All-In-One interface
Post by: Tuby128 on 2015.April.23. 19:59:55
Hello Mr. Pear,

 I am courious, which kind of PCB CAD program are you using to make the boards. And which company creates the board for you? May I ask how much does a board cost in Dollar or Eur, like that one you posted before? Here in Hungary an average 2 sided board [100X150mm] costs ca. 60-90 Euro with solder mask, via plating, white print etc.

 Thank you for your answer!
Title: Re: Enterprise All-In-One interface
Post by: ssr86 on 2015.April.24. 04:13:53
It is a wish list from a non professional user. Some are meaningless some are impossible.
And todays some are obsolete (IDE, RS232...).

My today wish list :-)
[...]
- external 4x8 bit DAC, connected to sound input lines. It is already supported by DTM player
- AY chip, connected to sound input lines. Will be usefull for Spectrum emulator.
- SID chip, connected to sound input lines. For the SID Player.
- will be great if these 3 sound devices can be used in same time :-) (+Dave)
[...]
I think two Daves would be good enough. You could do chip metal with that (using 4 channels for getting two guitar sounds):twisted:  
More unique and more enterprise-spirited...
But Daves are rare compared to Sids, Pokeys and AY... so this would need a "remake" of the chip...

Only a week is impressive.....
I have no clue about electronics (despite having a electronics-hobbyist father), so to me it sounds veeery impressive (especially looking at the prefossional-looking outcome):)
I guess this isn't just a hobby for pear...(?)

Here in Hungary an average 2 sided board [100X150mm] costs ca. 60-90 Euro with solder mask, via plating, white print etc.
...looks like quite an expensive hobby:(
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.24. 06:33:07
Just Pear, enough :) Nick comes from my name, which in Polish means roughly "pear".

Currently I'm using DipTrace (http://diptrace.com/). Up to 300 pins this program is free for non-commercial use.
I can recommend - very convenient to operate. I plan to purchase the Standard version (1000 pins).
Cost of production of small series PCBs in Poland are very similar.
That's why my projects plates are manufactured in China. Orders made up by the website (http://www.kikipcb.com/index.html).
Contrary to what some people write, the quality is very good and does not differ from European production.
In contrast, the prices are about five times lower. And it's starting with the shipment. On the website is calculator.
In return, you have to wait a little longer (about 3-4 weeks from sending the project to receive the finished PCB via standard mail).

I guess this isn't just a hobby for pear...(?)
Well, yes and no.
Electronics I have been dealing with a 10 year old. I finished school and studied electronics.
But unfortunately I do not work in my profession.

...looks like quite an expensive hobby:(
Yes, but if not now when ? :)
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.April.24. 08:08:19
Don't worry, it makes adding more illusion on this.
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.24. 09:09:57
It seems strange, but such an arrangement does not require a complicated method of addressing.

What do You think about it ?
Interesting idea! The problem: with this method hard to empty address space when needed cooperation with other expansion. Probably all memory ICS- needed to disabled :oops:

For the original, with 74HCT138 just two 74HCT151 needed to add for the jumpering.
For the A-B-C selection pins go A16-A17-A18. To the 8 input pins go the chip enable signal for the ROM, the 20-3Fh one. Output are the CE for the Flash ROM.
Then one input pin are for one 64K area of the ROM.
Input 1 will be jumperable for 00-1Fh/20-3Fh signal, then can be enabled the cartridge emulation.
For the RAM also similar, need Input 6 jumperable, for example 40-5Fh/E0-FFh signals, then 58-5Bh can be moved to F8-FBh
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.24. 10:02:28
If I know that I have to leave free segments for other extensions, then I guess I'm able to do it.
The only problem is that even just a little know the Enterprise.
That is why I am so glad that I finally came across this forum :)

What are existent extensions which segments need ?
Besides, after which on the other cards to mount additional ROMs available with 512KB Flash ?
I think they can be turned off for the other cards?
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.24. 19:57:11
which segments need ?
00-FFh :-D
Many different configurations exist, for example machines with internal 192K,320K,512K,576K,1088K or 1088K with different mapping memory.
Then I think the maximum flexibility for "mega memory card" will be a good option.
My idea: start with the 74HCT138 decoding. Each outputs can be disabled (8x jumpers or DIP switches).

First SRAM addressed with additional 74HCT151:
Input 0: E0-FFh signal
Input 1: E0-FFh/00-1Fh
Input 2,3,4,5: 00-1Fh
Input 6: 00-1Fh/E0-FFh
Input 7: 00-1Fh
Result: SRAM at E0-E7h,08-1Fh. The second 64K can be remapped to cartridge area on expanded machine where the Exh used, but the cartridge don't used.
18-1Bh can be remapped to F8-FBh for Enterprise 64

FLASH ROM also with 74HCT151, 24-27h can be remapped to 04-07h as I wrote previously.

SRAM2 at 40-5Fh
SRAM3 at 60-7Fh
SRAM4 at 80-9Fh
SRAM5 at A0-BFh
SRAM6 at C0-DFh
One of these (I suggest SRAM2) with Flash ROM pinout, and with jumpers for replace Pin 29 and 31 (WE  at different location on FLASH and SRAM), then second FLASH can be installed.
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.29. 15:56:27
Werner suggested this, but I'm also thinking about it:
8-bit CF interface (http://www.waveguide.se/?article=8-bit-compact-flash-interface), instead the very complicated 16 bit IDE card.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.29. 17:02:34
In such a configuration, there is a complete capacity CF card, or only half?
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.April.29. 17:47:15
And, can it work with a CF to SD adapter?
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.April.29. 19:25:58
Full capacity.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.April.29. 20:12:11
It sucks, because I have already PCB project to the IDE ;)
But this idea is closer to All-In-One.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.06. 19:06:09
I dug up old projects from the drawer.
A new revised version of the FlexiBridge and IDE-CF module I sent into production.

Almost finished a module RAM-Flash-Clock.
I'm a little caught a cold and I do not give advice to prepare files for production in this year.
I need some rest.

Short description of RFC module:
- RTC consistent with the project M.Gy. Enterprise Clock & Calendar (DS12887),
- sockets for two FlashROM and five SRAM (512KB each),
- both FlashROM can be replace by SRAM (configuration jumpers)
- possible to program 8 modes memory mapping (3 jumper M0, M1, M2) if I manage to fit, so much logic in the PLD (GAL 22V10)
- each chip can be independently off, including the RTC (dip-switch).
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.December.06. 19:46:57
Pear, you are tireless even ill...

What are these changes on Flexibridge and IDE card?

An Enterprise with all your cards can be incredible...
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.06. 19:52:43
The most important change is a reversal of IDC sides.
This will make possible the back conversion of FlexiBridge to the classic bridge.
The rest is basically cosmetic.
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.December.07. 09:41:14
As you know, I have one of your Bus Bridges and one of your Spectrum Emulators clone.

Will serve them for your modular system?
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 10:02:25
With new version of FlexiBridge already yes.
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.December.07. 10:09:02

Glad to know it, but count on me in any case...

You will bring a revolution...
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 10:38:39
These are the prototypes for now.
PCBs are large, so they are not cheap (approx. $ 15 apiece), but it is easier to make adjustments and look for errors.
Ultimately, when all of the blocks will work, I want all enclose in one large PLD.

PS. With this revolution, it's not as loud, because I could be in trouble ;)
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 11:06:02
Imagine ONE, not to big card, attached to the Enterprise edge connector, which is also the power supply.
Inside, lots of memory, slots for memory card, connector for the disk (maybe even SSD), USB ports etc.
Outside, only one IDC connector for new, experimental devices.
No jumpers. All configured from the menu on the computer screen (such witchcraft is already Zozo ;)).
Dreamy ...
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.December.07. 11:19:29
I previously suggested (https://enterpriseforever.com/hardware/enterprise-all-in-one-interface-1176/msg46301/#msg46301): forgot my complicated IDE card, and design new one directly for CF card. It is will more simpler and smaller.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 12:11:09
OK, but is there any ready-made software for EP that can handle such a simplified interface ?
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.December.07. 12:26:52
OK, but is there any ready-made software for EP that can handle such a simplified interface ?
My IDE sw easy can be modified. Only the very low level I/O routines needed to be modified (simplified). Can be done under few days.
Title: Re: Enterprise All-In-One interface
Post by: BruceTanner on 2015.December.07. 12:54:51
I previously suggested (https://enterpriseforever.com/hardware/enterprise-all-in-one-interface-1176/msg46301/#msg46301): forgot my complicated IDE card, and design new one directly for CF card. It is will more simpler and smaller.
I still hope to add a CF slot to the next revision of my EPNET card - all the address decoding etc is already there. And it now has 512k RAM :)
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 17:10:14
Could use a summary of the ports used by existing devices for EP.

10h-13h & 18h: Floppy Disk Controller
7Eh-7Fh:       Clock & Calendar
E8h-EBh:       IDE 16-bit channel 0
ECh-EFh:       IDE 16-bit channel 1

What else (serial card, EPNET, ZX Emulator, internal) ?
I would not like to do conflicts by creating new devices.
The 8-bit IDE-CF is needed eight available addresses.
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.December.07. 18:10:23
Ports 00h and 01h, input and output of the M.Gy. serial card.
Title: Re: Enterprise All-In-One interface
Post by: BruceTanner on 2015.December.07. 19:12:25
A similar list for the memory map would be useful too, I have been wondering about this.

ETNET is adjustable for both, but the I/O location is realted to the memory location:

Memory (512k)I/O (16 bytes)
20-3f10-1f
40-5f20-2f
60-7f30-3f
80-9f40-4f
a0-bf50-5f
c0-df60-6f
e0-fb*70-7f
* special EP64 mode to make the RAM continuous for badly-written programs

So more briefly :)  the I/O is the first memory segment / 2.

(sorry I don't know how to make a table display better than that)
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 19:26:51
B5h-B7h: Keyboard, Control, Serial, Printer
Title: Re: Enterprise All-In-One interface
Post by: BruceTanner on 2015.December.07. 19:34:19
Imagine ONE, not to big card, attached to the Enterprise edge connector, which is also the power supply.
Inside, lots of memory, slots for memory card, connector for the disk (maybe even SSD), USB ports etc.
Outside, only one IDC connector for new, experimental devices.
No jumpers. All configured from the menu on the computer screen (such witchcraft is already Zozo ;)).
Dreamy ...
Hi pear,

If you want to include an ethernet interface in with that lot the module I'm using (datasheet (http://wiznethome.cafe24.com/wp-content/uploads/wiznethome/Network%20Module/WIZ830MJ/Document/WIZ830MJ_DS_V130E.pdf)) only needs /CS, /RD /WR (and address & data lines of course). The tricky part is the code but I can help you out there :) just need 2 segments from a 29C010 FLASH

B.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 20:00:42
Just do what you're doing.
It makes no sense to duplicate.
When all the blocks will be ready, then we combine them into one whole.
For now, the point is that these blocks will fit together.
As one set :)
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.December.07. 20:28:31
What else (serial card, EPNET, ZX Emulator, internal) ?
I/O port list from Lgb (http://ep.lgb.hu/doc/ports.html)
And some addition:
-Z180 ports moved to 40-7Fh at the initialisation
-08-0Fh used by the SID sound card
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.December.07. 20:58:44
Then Pear can use that spare IDE ports from E0h to EBh, isn't it?
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 21:01:03
E0h-E7h: IDE-CF 8-bit :)
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.December.07. 21:03:57
And, what about the SD-card reader? does it take any port from that spare IDE ones?
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 21:22:15
Which ports use an SD card reader ?
Well, how many card readers at the same time you want to use?
As a last resort, you can still take advantage of the full 16-bit addressing ports.
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2015.December.07. 21:33:52
SD don't use any I/O ports, it is use memory mapped I/O in cartridge address space.

16 bit I/O can't used on Enterprise, because the Dave paging registers also active at I/O operations. Max 14 bit (A0-A13) can be used.
Title: Re: Enterprise All-In-One interface
Post by: lgb on 2015.December.07. 21:38:48
Which ports use an SD card reader ?
Well, how many card readers at the same time you want to use?
As a last resort, you can still take advantage of the full 16-bit addressing ports.

No port is used. SD card reader is a "BASIC cartridge replacement" like solution and uses normal memory addresses instead of I/O operations.

By the way, what's the advantage of CF over SD? Since the SD solution for EP is already well established, I am curious what CF can give that it's better. If it's better at all :) Sorry for the dumb question, I've never had CF card, and I never used, that's why I ask this.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 21:48:46
To read the CF card does not need additional processor that handles the SPI protocol. Nothing else.
Title: Re: Enterprise All-In-One interface
Post by: lgb on 2015.December.07. 21:58:08
To read the CF card does not need additional processor that handles the SPI protocol. Nothing else.

I see, but the SPI protocol is handled by a CPLD in the SD cartridge, so there you don't need to "talk" SPI directly by the EP either. Or you mean, that you can save a CPLD here ...

Ok, I may get the point now, I am sorry :) I thought the CF card is needed on the all-in-one stuff because there is some fundamental problem with the already existing SD card cartridge solution and that was what I didn't understand ...
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.07. 22:09:47
But I will not insist.
I just want to try different solutions.
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2015.December.07. 22:33:15
I think, the actual (or near future) variety in hardware is infinitely better than the lonely desert of the past.

And the best is that all the bits will be compatible.
Title: Re: Enterprise All-In-One interface
Post by: BruceTanner on 2015.December.08. 00:36:00
Also "Compact" Flash is  not actually very compact! Well compared to an SD card anyway. And I think it's a bit more expensive for the same size.

I think it's single advantage is its ease of interfacing to the z80.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2015.December.11. 06:25:42
Santa Claus goes with PCBs :smt114
Title: Re: Enterprise All-In-One interface
Post by: Tutus on 2015.December.11. 09:42:42
Santa Claus goes with PCBs :smt114

Pear, this is fantastic!
We are looking forward. :ds_icon_cheesygrin:
Title: Re: Enterprise All-In-One interface
Post by: slugman on 2015.December.11. 18:06:43
Santa Claus goes with PCBs :smt114

:cool: Excellent!
Title: Re: Enterprise All-In-One interface
Post by: Bagpuss22 on 2015.December.31. 00:35:14
Awesome, as always!
Title: Re: Enterprise All-In-One interface
Post by: pear on 2016.February.18. 17:27:55
Another part of the puzzle on the way - RAM/Flash/Clock card
Title: Re: Enterprise All-In-One interface
Post by: Z80System on 2016.February.18. 18:07:16
I do not say I'm understand what these are and how to use these and for what to use these ... :shock:
Title: Re: Enterprise All-In-One interface
Post by: geco on 2016.February.18. 18:08:54
I think RAM expansion, you can write ROM images into Flash, and a clock card. It is cool.
Take me into account if it is ready :)
Title: Re: Enterprise All-In-One interface
Post by: Z80System on 2016.February.18. 18:13:15
But there are two other ones ...
Title: Re: Enterprise All-In-One interface
Post by: pear on 2016.February.18. 18:18:26
At the first image, at the top of the page, is the IDE/CF card.
Below is the FlexiBridge which connects the cards to the Enterprise.
The last picture is an extension of memory (up to 3.5 MB) with real-time clock.
Optionally, instead of the first two chips of RAM you can install flash memory.
Title: Re: Enterprise All-In-One interface
Post by: Z80System on 2016.February.18. 18:26:55
Quote
Below is the FlexiBridge which connects the cards to the Enterprise.

What properties make a FlexiBridge flexi ?

How can somebody connect two card to a FlexiBridge (As far I can see, the FlexiBridge has only one connector on its surface) ?
Title: Re: Enterprise All-In-One interface
Post by: pear on 2016.February.18. 18:36:01
Connectors are clamped on a multiwire flexible tape (similar to hard disks IDE, just wider).
You can plug into the tape as many connectors as you need.
Flexible solution :)
Title: Re: Enterprise All-In-One interface
Post by: Z80System on 2016.February.18. 18:40:51
Interesting, but I cannot imagine that ...

Why will those cards stand ? Or do I have to make a case for the cards, and will I join that case with the cable ?
Title: Re: Enterprise All-In-One interface
Post by: pear on 2016.February.18. 18:55:32
For now are only prototypes. All cards are still possible to mount the connector (IDC to FlexiBridge) or edge connector (standard connector EP without the mediation of the bridge).
The tab holes are in the same spacing which is in the drive 3.5 ".
At the top of the stack are floppy drives.
The next cards, you can add one below the other, combining them with distance spacers.
Housing for the "tower" is not planned.
If all the "floors" will work, then I plan to design one card with all the features of each prototype cards.
At the moment, "tower" has a working interface EXDOS and two floppy drives.
(https://enterpriseforever.com/hardware/zx-spectrum-emulator-card/?action=dlattach;attach=12342;image)
(https://enterpriseforever.com/hardware/entermice-joy-ps2-mouse-interface/?action=dlattach;attach=13423;image)
Title: Re: Enterprise All-In-One interface
Post by: Z80System on 2016.February.18. 19:02:44
Wow! What do you think about the size (physical dimensions) of the REAL all in one card ? :)
Title: Re: Enterprise All-In-One interface
Post by: Z80System on 2016.February.18. 19:05:51
And when will you announce a hardware snapshot function for the EP, at last ? :)

I would like to play on a real-steel machine with savegames ...
Title: Re: Enterprise All-In-One interface
Post by: pear on 2016.February.18. 19:08:04
Maybe able to make it smaller than the original EXDOS.
The bus-bridge will be superfluous.

A hardware snapshot function ?
When "floors" will be done and tested.
Title: Re: Enterprise All-In-One interface
Post by: Z80System on 2016.February.18. 19:10:26
Wow2!

Wow3!
Title: Re: Enterprise All-In-One interface
Post by: pear on 2016.February.18. 19:17:22
For the tests, I'll try to design the maximum possible configuration able to connecting with the EP.
I do not know if it will work. Still poorly I know the Enterprise (just three years ago I did not know that this existed :oops:  ).
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2016.February.18. 19:20:02
And when will you announce a hardware snapshot function for the EP, at last ? :)
I think it is near to impossible :oops:


My question is more easy: sprite unit? :-)
Title: Re: Enterprise All-In-One interface
Post by: Z80System on 2016.February.18. 19:37:11
Quote
I think it is near to impossible :oops:

Near to impossible doing one 98% working one,

or near to impossible doing a 100% working one ?
Title: Re: Enterprise All-In-One interface
Post by: pear on 2016.May.14. 19:59:07
I did launch today the new FlexiBridge and I did the first tests of the card RAM/Flash/Clock.
Memory in slots RAM2-RAM6 passed the test successfully.
In slot FlashROM_RAM1 working properly both as Flash and as RAM (jumper).
Each of the memory chips (512K), you can individually turn off without removing it from the socket (dip-switch).
The RTC chip didn't install yet. I've got also a bit of work on the PLD.

Is the test at startup can detect the Flash memory ?
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2016.May.14. 21:06:23
Wow! :smt038

Is the test at startup can detect the Flash memory ?
As chip type? Currently no.

If you write lot of roms to it, then you can test it is working.
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2016.May.14. 21:42:37
3200kb of Ram... Whoaaa! I get dizzy only thinking on it....

Wait, we are on year 2016.....
Title: Re: Enterprise All-In-One interface
Post by: Ep128 on 2016.May.14. 23:36:34
Nice! :-)
Title: Re: Enterprise All-In-One interface
Post by: Bagpuss22 on 2016.May.15. 02:00:16
Excellent work, as always :cool:
Title: Re: Enterprise All-In-One interface
Post by: Tutus on 2016.May.15. 07:12:04
:smt041 :smt041 :smt041
Title: Re: Enterprise All-In-One interface
Post by: dmacoco on 2016.June.17. 03:36:33
:shock:

is that interface will allow enterprise 64 owners to use all the programs ?
Title: Re: Enterprise All-In-One interface
Post by: pear on 2016.June.17. 06:17:25
Yes, why not ? :D
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2016.June.17. 09:42:49
is that interface will allow enterprise 64 owners to use all the programs ?
Not all, because some are incompatible with the EXOS 2.0 :-(
But most of will run.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2017.December.14. 08:09:22
I disappeared for a while, but 2017 was very busy for me. Unfortunately, the effects of this work are hardly visible.
I spent a lot of time on repairing retro computers. Mainly ZX Spectrum.
I also lost a lot of time for the remake of the Italian Chrome 128 project.
It caused a lot of problems, and even though the clone works, I'm not happy with the result.
I wanted to squeeze out more of it.

So it's time to go back to my own projects.
Because in the last year quite a lot has happened in the equipment for EP (internal RAM, SD card reader), I have revised my publishing plans.
Only two projects will remain from the entire package of cards I have planned so far:
* Dream Turbo Card (https://enterpriseforever.com/hardware/6mhz-and-more/msg64628/#msg64628) (started) and
* AMIO Card (originally it was supposed to be AllMost In-One, now more Advanced Module IO ;) ).
It will be a compilation of previous projects.

The first one will be an internal module. It will feature:
* a programmable, two-channel clock for the system and EXDOS
* Real Time Clock
* 1 MB RAM memory (optional 2MB)
* FlashROM 512KB with programmable page mapping.

The second module will be external. It will contain:
* a diskette drive controller
* 3.5" diskette drive
* built-in Gotek-HxC
* CompactFlash card slot
* maybe ZX Spectrum 48K Emulator.

This is the plan and at the same time the New Year's resolution :)
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2017.December.15. 11:16:30
As the turbo clocks are generated internally, how will you pass the clock signal to the WD on the Exdos controller? I think you will need an extra connector to not interfere with the system clock on the expansion connector.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2017.December.15. 11:22:15
The second clock I will want to move out on the external edge connector instead of existing 8MHz signal.
Title: Re: Enterprise All-In-One interface
Post by: gflorez on 2017.December.15. 12:06:52
But then, it will interfere with other cards that need the stock 8Mhz clock.

Better ask Zozo if some of the Not/Connected pins of the expansion connector can be used.
Title: Re: Enterprise All-In-One interface
Post by: pear on 2017.December.15. 12:19:28
In this case, only pins A34 or B34 remain on the edge connector.
What about the 1MHz signal? Is it also supposed to remain original?
Title: Re: Enterprise All-In-One interface
Post by: Zozosoft on 2017.December.15. 13:59:37
But then, it will interfere with other cards that need the stock 8Mhz clock.
No any card which is use it.
I suggested it this solution, because then not need to modify the EXDOS card for HD handling. (Only need WD 1772 PH 02-02 installed).
Title: Re: Enterprise All-In-One interface
Post by: Tutus on 2017.December.16. 07:24:37
Very good news!
We are looking forward to have a card with FlashROM :)