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Author Topic: EPNET 1.2 (Read 231 times)

Offline BruceTanner

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EPNET 1.2
« on: 2017.July.24. 21:35:58 »
A few people have asked about EPNET progress recently so I thought I'd start a new topic for everything to do with EPNET.

Recent work
After the problems I had with glitches on the Enterprise's /RD and other z80 signals on the expansion bus (described in painful detail in other topics :cry:), and after discovering that a few original EXDOS cards include a fix :shock: , I have copied the fix and applied it to EPNET. This involved a new revision of the PCB which I am calling EPNET 1.2. (1.0 was my first version, and 1.1 was an intermediate version that never got made).

EPNET 1.2
EPNET 1.2 also includes: A compact FLASH card interface, nearly :oops: 512k expansion RAM, the ability to enable 64k FLASH ROM for any other ROM images, the ability to sit between the Enterprise and other expansion such as EXDOS, and the ability to live in a box.

18325-018327-1

Current state
I hope to be able to send out two "beta" prototype cards soon time for further testing in environments other than my little workshop. For example I have not tried it with 8 or 10MHz machines or with any Enterprises other than the 3 I own. I am particularly nervous about the last point given my /RD noise problems :(

If that goes ok I have enough parts and PCBs to build 7 more. While I am doing that I will need to order more parts and PCBs which will have a lead time of several weeks.

I hope to make it available as a vertical naked PCB as shown above (which can also be plugged into an expansion bus), a vertical box, or a horizontal box as shown above. (No photo yet of the vertical box as I am still working on it! :oops: ). The box versions sadly will have to be more expensive due mostly to the cost of the box itself.

Future
ESP8266 version: it should be possible to make a wireless version by just replacing the network module. But so far I only have a half-built prototype. :oops:
EXDOS integration: I would like to be able to map a drive letter to a network directory so that EPDOS etc works with a network directory. This requires a lot of work with EXDOS but that should also lay the ground work for FAT16 or possibly even FAT32. :shock:

This project is only a "hobby" in my spare time so no guarantees of timescales. I am going as quickly as I can but there are lots of other demands on my time particularly in the summer months! :roll:.

Offline Zozosoft

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Re: EPNET 1.2
« Reply #1 on: 2017.July.24. 21:42:57 »
Wow! Looks very promising!
:smt041

Offline Witchy

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Re: EPNET 1.2
« Reply #2 on: 2017.July.24. 22:25:27 »
Fantastic effort there!

I have several EPs near Cambridge if you need beta testers :ds_icon_cheesygrin:

Offline gflorez

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Re: EPNET 1.2
« Reply #3 on: 2017.July.25. 00:45:10 »
I have translated to Spanish your commentary on the Retrowiki web page.

Please keep on working on that amazing card.....

Thanks.


Offline geco

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Re: EPNET 1.2
« Reply #4 on: 2017.July.25. 08:54:17 »
Cool :)

Offline Tutus

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Re: EPNET 1.2
« Reply #5 on: 2017.July.25. 18:29:41 »
Very nice!!! :smt038