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Author Topic: EPNET (Read 4390 times)

Offline BruceTanner

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Re: EPNET
« Reply #30 on: 2017.September.25. 13:47:22 »
Current position: I have a almost-complete PCB layout for the wifi module but there is still a lot of work to do yet. At the moment I am concentrating on getting some EPNET cards out to a couple of other people other people for further "beta" testing.

The good news is I have finally fixed the signal noise problems! I will save the technical details for another post, but there are some EPs that are "problematic", mostly ISSUE 4 PCB EP64s, that will not work with add-on hardware such as Microteam cards and sometimes original EXDOS cards. I am lucky enough to have one of these EP64s :lol:  and EPNET is now working happily with it.

In case you are wondering, the LEDs in the photo are on legs because it can fit in a box, and they need to poke through the lid!

Offline Tutus

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Re: EPNET
« Reply #31 on: 2017.September.25. 14:21:26 »
Thanks for the information, Bruce! :)

Can I get a card for beta testing? :)

Online gflorez

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Re: EPNET
« Reply #32 on: 2017.September.25. 18:20:50 »
"The good news is I have finally fixed the signal noise problems! I will save the technical details for another post,...."


I am eager waiting for you to reveal those details, to know if the fixes can be applied easily to older expansion cards, even putting the fixes on a Bridge Connector...

Offline BruceTanner

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Re: EPNET
« Reply #33 on: 2017.September.25. 19:25:04 »
I am eager waiting for you to reveal those details, to know if the fixes can be applied easily to older expansion cards, even putting the fixes on a Bridge Connector...

Yes with just two capacitors I have successfully "fixed" a Microteam EXDOS card so that it works on my "bad" EP64, which it did not before the fix. It is not really a proper fix using only capacitors as there are still glitches around but on the "fixed" signals they are now just small enough not to cause trouble (ie. <0.8V); on the other signals (address lines etc), well, who knows?, it seems to work! :shock: :lol:. I only did it to prove my theory, I have already "unfixed" it again because it is useful to me for EPNET testing.

The full EPNET fix to suppress a glitch is a resistor with the capacitor but as it is not practical to do this to every z80 signal (or is it...? :lol:), EPNET does it on it's memory address decoding output, I/O address decoding output and a few other selected signals. Five pairs of R and C in total.

The downside is that there are signal timing implications - a R & C will delay the signal a bit - so I am keen to see if it works at 10MHz!

So yes it should be possible to bodge a Bridge Connector, or even to fix a "bad" EP internally.

Offline BruceTanner

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Re: EPNET
« Reply #34 on: 2017.September.26. 16:38:18 »

Online Zozosoft

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Re: EPNET
« Reply #35 on: 2017.September.27. 21:02:58 »
The "deep water" testing when I can try with my "few" machines :-)

Offline BruceTanner

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Re: EPNET
« Reply #36 on: 2017.September.28. 09:49:54 »
The "deep water" testing when I can try with my "few" machines :-)
Will be interesting...the thing I am most worried about now is 10MHz :shock: :shock: :shock:

Offline Tutus

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Re: EPNET
« Reply #37 on: 2017.September.28. 16:29:36 »
So thinking ahead ... :ds_icon_cheesygrin:
Is there a text-based browser on the CP/M system?
Or can you then write program something on EP? (index.html file reading)

Offline BruceTanner

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Re: EPNET
« Reply #38 on: 2017.September.28. 17:36:30 »
Is there a text-based browser on the CP/M system?
No I don't think so, CP/M was too far before the internet.

Or can you then write program something on EP? (index.html file reading)
I have written a simple text-based browser in C that will display a .html file, but it only goes from top to bottom. Doing page up/down while preserving the formatting is another thing altogether. I think there is an open-source text-based browser, I've forgotten what it is called, but that too looked rather complicated!

Even http: is a bit out of date now, many web sites have now moved to https: (eg. enterpriseforever.com!) :shock: :shock: :shock:

Offline BruceTanner

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Re: EPNET
« Reply #39 on: 2017.October.05. 21:14:29 »
I took some photos today to update the User Manual.

19056-0
19057-1
19058-2
19059-3
19060-4
19061-5

Offline Tutus

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Re: EPNET
« Reply #40 on: 2017.October.05. 21:17:54 »
This is something wonderful!!! :)
:smt041 :smt041 :smt041

Online gflorez

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Re: EPNET
« Reply #41 on: 2017.October.06. 01:07:39 »
Great! I put the pictures on the Spanish web page.

Offline geco

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Re: EPNET
« Reply #42 on: 2017.October.06. 08:33:57 »
coooooooooool :smt041

Online dangerman

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Re: EPNET
« Reply #43 on: 2017.December.22. 12:22:38 »
Wow - I'm an old EP enthusiast and I've just found out about EPNET. Sounds really exciting. Great to see there are so many EP hardware projects still going on in 2017!

And even better that EPNET is being made by Bruce Tanner - who wrote the original IS BASIC. Brilliant!

Can't wait for it to be released...

Offline Kapitany

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Re: EPNET
« Reply #44 on: 2017.December.22. 15:00:54 »
I hope I can start translating the manual during the holidays - if there is still need for it :)

K