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Author Topic: Yet another another super breakout  (Read 1521 times)
vernimark
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« on: January 17, 2017, 11:02:22 PM »


I found a superbreakout board used for years as spare, so some chips were missing including roms.
I installed all missing parts and tested the board with the roms from another board. One ram was faulty but it has been an easy fix.
Now I have a working board withoit roms (pcb version with 3 1024x8 roms)
Do you have spare to sell me or any idea how to replace them?

Thank you!
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Pinge
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« Reply #1 on: January 17, 2017, 11:27:34 PM »

Is it not possible to burn the roms you need?  Huh?
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vernimark
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« Reply #2 on: January 18, 2017, 12:02:06 AM »

I haven t any idea which kind of rom it is.
Should be 2048x8 but pinout is different from proms i know...

Mostek 28000p is similar but power pins don t match. Seems it needs -12v

I ll check better
« Last Edit: January 18, 2017, 12:11:19 AM by vernimark » Logged
vernimark
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« Reply #3 on: January 18, 2017, 11:30:53 AM »

During the night I had an idea.
I want to try to transform my -04 board version to a -03 version.
It means to populate the "small" proms instead of the 3 big roms.
Small proms are 74s 573, easier to find (and to burn of course)
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