View Full Version : Modified A2386SX for Zetr0
09 February 2008, 20:47
I'm new here, but I thought I would throw this up for Zetr0. He seems to like hardware as much as I do. It's an A2386SX-20 with the Cyrix 486 upgrade, socketed clock oscillator, and coin cell/diode hack.
Perhaps someone can help me with the Bios modifications for 16MB. See the thread at Amiga.org for details.
10 February 2008, 00:36
see my reputation proceeds me!!!!
thats a fine hack indeed!
hmmm insofar as upgrading to 16MB.... perhaps using a bios boot rom a latent 486slc card ???
this linkie might help
Welcome to the EAB :D
10 February 2008, 00:52
BBOAH says this:
RAM: 1MB (Expandable to 8MB with ZIPs, 16MB with a ZIP to SIMM converter)
seems like a very difficult task... I doubt that by taking a "bios" from a GG card this will work... even if u could, it would not work either...
and if you think of it, nothing that runs on a 386sx/486slc/486slc2 would require more than 8MB RAM... even DOOM that is it's high-end game IMHO is happy with 8MB , plus it is crappy on even a 486slc2/50mhz bridgeboard.... I have one , I know!
you get the following speed, that it's just not enough....
10 February 2008, 03:57
There was a hack at aminet about this ... hmm can't remember right now, but you had to dump the rom, change some bits and write it back I guess ... Hope you have a rom burner handy.
22 August 2008, 21:35
If either of you would like to pursue this, I have a firmware programmer available which can definitely read/write to the EPROMS. I can also source some EPROMS if the C= ROMS are true ROMS.
Let me know, zetro et al.
22 August 2008, 23:31
Hello there, Welcome to the EAB :)
theres plenty of retr0licious mischief to get up to :)
Alas I don't have an Golden Gate SBC although any help you can offer those that do I am sure they would really appreciate it :D
23 August 2008, 14:17
386sx class cpu's (including the 486slc ones) cannot address more than 16MB of RAM.
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