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Not so sure on the "easy steps"
Have exactly everything detailed in the steps.
Have a nice collection of 27C400 EPROMS that pass
blank checks and UV wipes perfectly.
Have a decent UNIMAX universal programmer
Have original kickstart 3.1 rom image from working
A2000.
Loaded of the rom image, performed byte swap
Burned chip. Passes verification.
Plug chip into A500 boot..........
Power light flashes then system fault press left mouse button.
I've tried on 7 chips. All no go when put into a rev 6A A500,
This is the same unit as the A500+ just minus the extra 512k chip
and clock but the MB has the silkscreen for where they would go.
Am I missing something in the translation?
I know the 27C400 is the correct part, matches exactly to the
MX part used for almost every 3.1 kickstart out there.
Anyone else use a UNIMAX or MULTIMAX programmer have an idea
where I might be going wrong?
I'm doing this for fun and education. I own every Amiga production
model made and am using my off time now to have fun and tweak the
kickstart with patches.
Angelo
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