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Re: Another Egyptian Enterprise 64
Posted: 21 Sep 2026 20:13
by stephen_usher
If it's detecting 512K but then saying that it's bad suggests a data line issue rather than an address line, which is what's on EXP2. Well, it could be the SRAM chip being faulty as well I s'pose.
I had a different design of RAM board.
- IMG_5290.jpeg (247.83 KiB) Viewed 22 times
P.S. Do I see a dry joint one one of the header pins on your board?
Re: Another Egyptian Enterprise 64
Posted: 21 Sep 2026 20:46
by PhilC
@rubber_jonnie yes that's the rom chip I meant. Do check that I put the ram chip in the socket correctly :lol: and not impossible the ram chip is bad. It's new old stock from China so never know.
Re: Another Egyptian Enterprise 64
Posted: 21 Sep 2026 21:45
by rubber_jonnie
PhilC wrote: 21 Sep 2026 20:46
@rubber_jonnie yes that's the rom chip I meant. Do check that I put the ram chip in the socket correctly :lol: and not impossible the ram chip is bad. It's new old stock from China so never know.
Well that's the ROM taken care of at least.
The RAM was correctly inserted BTW, will see if I can find a similar RAM ic, do a cross check.
Re: Another Egyptian Enterprise 64
Posted: 21 Sep 2026 22:14
by stephen_usher
With respect to the ROM...
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