A while ago I had an Amiga 4000 that boots fine with an A3630, but A3640 (or A3660) won’t boot. I spent many hours to find the problem, couldn’t find it. So I left the board for a week or two, after that I inspected everything again, and everything seemed ok. There was one thing […]
Tag: amiga
Upgrade Amiga 500 rev. 8a board to Amiga 500+
A while ago I got an empty Amiga 500 plus (+) case, without keyboard and mainboard. I had a spare Amiga 500 rev.8a board (and keyboard), so I decided tot upgrade that one to an Amiga 500+. In this post I show which components must be replace on the board and which changes must be […]
A600 joystick problem
Got an A600 for recap, in the pretest I discovered a problem when joystick UP was triggered it triggers both UP & LEFT. It occured on both joystick ports. Never seen this problem before, found some forums that reported the same issues but without any solution/fix for it. Multiplexer My first thought was U34 (74LS157 […]
A1200 CIA timer failure
A1200 with timer failure on CIA-A (u7) with amiga test kit (ATK). Removed CIA (U7) Placed PLCC44 socket and new CIA Result.. Timers are working again.
Amiga 500,500+,2000 & 3000 drive selector switch
Amiga 500,500+,2000,3000 drive selector switch