VIC 20
assy no 250403
fab no 251040-01
rev.d
also laut anhang scheidet der 6522 uab3 aus da cassette funzt...
UAB1 6522 VIAINTERFACE, KEYBOARD-SERIAL
Startup screen normal, but no cursor. Keyboard doesn't work at all.
Partial failure: some keys "stuck" or don't work... may be a whole row or
column. Also can cause serial port (drive access) problems. Can produce
blank screen if shorted (remove to check).
UAB3 6522 VIAINTERFACE, SERIAL-JOY-USER-CASS
Startup screen normal, but drive access problems ("SEARCHING FOR.. "
forever). One or more joystick positions don't work. No cassette or user
port access. Can produce blank screen if shorted (remove to check).
quelle ray carlson
http://personalpages.tds.net/~rcarlsen/cbm/vic20/vic20.txt