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09 February 2008, 20:47
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#1 |
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Registered User
Join Date: Aug 2007
Location: USA
Posts: 365
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Modified A2386SX for Zetr0
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.
A2386SX.jpg Perhaps someone can help me with the Bios modifications for 16MB. See the thread at Amiga.org for details. http://www.amiga.org/modules/newbb/v...=43317&forum=8 Jeff |
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10 February 2008, 00:36
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#2 |
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Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
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@Magic
Awesome!!!!! 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 http://amiga.resource.cx/exp/search....&base=dec&pid= btw.... Welcome to the EAB 
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10 February 2008, 00:52
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#3 |
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.
Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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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.... 
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10 February 2008, 03:57
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#4 |
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hastala vista winny vista
Join Date: Feb 2006
Location: mt fuji
Age: 46
Posts: 1,335
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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.
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22 August 2008, 21:35
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#5 |
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Registered User
Join Date: Aug 2008
Location: San Francisco Bay Area
Posts: 94
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I have a firmware programmer
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. |
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22 August 2008, 23:31
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#6 |
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Ya' like it Retr0?
Join Date: Jul 2005
Location: United Kingdom
Age: 49
Posts: 9,768
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@aperez
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
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23 August 2008, 14:17
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#7 |
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.
Join Date: Oct 2004
Location: Ioannina/Greece
Posts: 5,040
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386sx class cpu's (including the 486slc ones) cannot address more than 16MB of RAM.
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