Help getting an unknown Gigatron A500 card running in my Amiga 500 (rev 6a)

[Antti]

Hi pSyChO dAd

First of all, I see that you have a jumper connected to ST2. ST2 is for connecting the memory board to the Gary adapter. Jumpers are used in JX A & B.

Anyway, I have Gigatron MiniMax in one of my A500. I didn't get any memory out of it without the cable connected to the Gary adapter. I took a picture of my setup and marked the pins if you want to make your own cable (I used my own pin numbering). Just connect 1 to 1, etc.

Also you might get 512KB if you remove the Gary adapter and set jumpers to JX A and B as the manual suggests. I have not tried that myself.

Hope this helps

[Antti]

Ouch, that doesn't look too good If you have a multimeter you could check the rail for continuity on that corroded area. Or solder a patch wire and see if that's enough to bring the card back to life. Card's on/off switch ST3 seems to be connect to that rail also. Anyway you should remove or replace the battery or eventually it will kill the card for good. I doubt the battery is required, usually they just keep the clock powered when Amiga is powered off.