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Author Topic: SD card interface (Read 98214 times)

Offline Z80System

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Re: SD card interface
« Reply #225 on: 2014.September.18. 16:36:52 »
What will happen when we are using a cartridge SD controller and other EXDOS extension devices together ? :)

IDE controller card (what is an EXDOS extension device, too) can work together with the WD floppy controller, by design.

But the cartridge SD has EXDOS and its own SDEXT, what will happen if I connect an EXDOS card with floppy controller, or Saint's combined RAM/ROM/SD card what will probably contain an own EXDOS and its SDEXT like extension ?

Can anybody say it ? :)

Will these be "use by itself alone" devices ?
« Last Edit: 2014.September.18. 16:40:22 by Z80System »
Z80 System

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Re: SD card interface
« Reply #226 on: 2014.September.18. 16:53:03 »
Any EXDOS extension can be combined, only limit: Z are the last drive letter :-)

Offline Z80System

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Re: SD card interface
« Reply #227 on: 2014.September.18. 16:58:51 »
Quote
Any EXDOS extension can be combined, only limit: Z are the last drive letter 

Okay, it is then the hardware side and the EXDOS extension software side,

but what will be with the multiple and different EXDOS ROM instances ?

I will have to reduce to only one EXDOS ROM instance in my system ? And if my system will have a WD floppy controller chip, I will have to reduce to a WD compatible (original) EXDOS ROM, and when I have no WD chip in my system, I will have to reduce to a single EXDOS ROM without WD chip support ?
Z80 System

Offline Z80System

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Re: SD card interface
« Reply #228 on: 2014.September.18. 16:59:56 »
Quote
Any EXDOS extension can be combined, only limit: Z are the last drive letter 
And there will not be name collisions, like SDEXT, or something ?
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Offline Z80System

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Re: SD card interface
« Reply #229 on: 2014.September.18. 17:08:42 »
In the other side,

what have been with the quick(advanced) ram test(detection) side of the saint's combined extension ?

Will it work plugging into a stock machine, finally ? Or have I to burn quick test to the cartridge or the mainboard ?
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Offline Z80System

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Re: SD card interface
« Reply #230 on: 2014.September.18. 17:11:18 »
And how can I change the ROMs in the extension ? Is there a software done for it, already ? I can change the ROMs as simple as I can with the cartridge SD card's ROM segments ?
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Offline Saint

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Re: SD card interface
« Reply #231 on: 2014.September.18. 17:52:45 »
The fast test is mapped into the onboard flash on the expansion. Currently there is no flashing software (I haven't had time to write it), so you would have to flash any additional ROM's manually. However it wouldn't be difficult to write a flashing program if someone wanted to do this... :)

Offline Z80System

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Re: SD card interface
« Reply #232 on: 2014.September.18. 18:00:26 »
Quote
The fast test is mapped into the onboard flash on the expansion.
Hmmm ... I thought the fast test can be placed only into the cartridge or into the mainboard rom.


Quote
 so you would have to flash any additional ROM's manually

What does it mean "manually" ? With an external device, or something ?
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Re: SD card interface
« Reply #233 on: 2014.September.18. 18:01:25 »
I have a FLASH program. The best way extend this to universal FLASH program.
Your card use which type of FLASH chip?

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Re: SD card interface
« Reply #234 on: 2014.September.18. 18:04:35 »
Hmmm ... I thought the fast test can be placed only into the cartridge or into the mainboard rom.
If the card ROM decoded to cartridge address space, then fast test can be used with stock machine. (No cartridge can be used in this situation.)

Offline Saint

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Re: SD card interface
« Reply #235 on: 2014.September.18. 18:04:55 »
I decode the cartridge address space... ah, which does mean of course, you cant run a cartridge as well as this expansion. I designed this as a "plug and play" device for any Enterprise, which will give you RAM / ROM and SD card, fast RAM test and latest BASIC.

Flash is an SST39SF040 :)

Offline Z80System

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Re: SD card interface
« Reply #236 on: 2014.September.18. 18:11:04 »
Quote
If the card ROM decoded to cartridge address space, then fast test can be used with stock machine. (No cartridge can be used in this situation.)

Does the cartridge decode to fix position, cannot I change to other place ?

So if saint's extension maps to the cartridge place, cartridge will be an other place ?
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Re: SD card interface
« Reply #237 on: 2014.September.18. 18:13:18 »
Quote
I decode the cartridge address space... ah, which does mean of course, you cant run a cartridge as well as this expansion.
Cannot somebody change the decoding of the expansion ROM to other places in those cases, when they have already a quick test in the cartridge or in the mainboard rom ?

With jumpers or some programming of something in the card ? :)
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Offline Z80System

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Re: SD card interface
« Reply #238 on: 2014.September.18. 18:22:20 »
Against the confusion:

I would like to get this device when it will be possible,
it does not depend on the cartridge thing,
I'm only asking to know ... :)
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Re: SD card interface
« Reply #239 on: 2014.September.18. 18:27:42 »
I also want to have both! :-)