I may have caused some confusion, sorry.  Until I check the machine, which is 
in storage, I'm not certain about what's on the board, other than it's 
definitely not an EEPROM.  A write once/read many PROM would be my guess.

FWIW,  I've previously used a burning service for EPROMs and plan on doing so 
again.  My electronics bench is configured for things like the 12AX7/ECC83, not 
digital stuff.

I will move ahead, very slowly.  The 32 MB RAM limitation I appear to be 
squarely up against rules any sort of useful Linux out.  The OS will be Windows 
98 (phooey!) and I already have DOS utilities, which can  deal with the Y2K and 
586 configuration matters.  Autoexec.bat or (possibly) config.sys will run that 
code, before windoze thunks out of 16 bit real mode into 32 bit protected mode.

16 MB 30 pin SIMM "slugs" are available, but I can't even begin to guess if the 
chipset can be tweaked into working with them.  It would seem the number of 
address lines hasn't changed, as 30 pins is 30 pins.  The SIMMs are arranged in 
2X 4 "slug" banks, with each SIMM making up 1 byte of any given 32 bit word.



Eli D.



________________________________
From: Felix Held <[email protected]>
Sent: Monday, November 11, 2019 2:29 AM
To: Eli Duttman <[email protected]>
Cc: [email protected] <[email protected]>
Subject: Re: [coreboot] Re: Howdy!

Hi!

> Since you mentioned that the system is using an EPROM, what type is it? Maybe 
> there's a way to emulate it

If it's a parallel eeprom/nor flash, the memsim2 might be worth a look. Beware 
though that if the mainboard has +12V connected to the programming voltage pin 
or another unused pin of the socket, that'll fry the memsim2, so build a small 
adapter that doesn't connect those two pins, but connects the rest.
There's also an open source tool to push the firmware image to the emulator; 
haven't tried the vendor tool.

Regards
Felix

--
Felix Held
c/o cyberkombinat23
Steinstraße 23
76133 Karlsruhe
Germany

[email protected]

Ust-ID: DE301814366

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