ScuzzBlog: Diaries July 2017
Entry 2nd July 2017: Post: 1
Early Amiga 500
Hi
A month or so ago I went through the A500's I have and found around
three with issues. One was a very early A500 with the red LED and C= key
and the red Caps Lock. When I switched on I am getting a yellow screen.
Anyway I opened up and first found a Trops RAM 500 card with a strange
couple of wires in the trap door. There was also something very loose
inside. I removed the keyboard and shielding and out from below the
floppy drive popped a switch. The small wires ran from the card and the
switch I assume use to just hang out the bottom.
All appeared fine. A500 Rev 5 and Serial No. 011753. The ROM had been
upgraded to the 1.3 315093-02 1988. The chips had the distinctive mark
of IIIOE... MOS that's as close as I can make it look.
And so having seated what I could I fired up and she worked first time.
Memory 888128. With the switch the other way the memory was 363936,
though that caused a GURU and a reboot. Still worked though with the
smaller memory. Whether the switch was causing a short I don't know.
Nice to be able to put one of my oldest 500s to bed.
This is the RAM board.
http://amiga.resource.cx/exp/eram500
scuzz
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