21-10-2022, 12:19 AM
Hi John,
Nice find.
Video board on the right is the later model with full 8 bits for screen Mem, so you probably have Lower Case already.
Test with:
10 FOR T = 0 to 255
20 POKE 15360+T,T
30 NEXT T
40 GOTO 40
You also have some kind of expansion ROM fitted in the $3000 area (The ceramic EPROM at the bottom left of the CPU board).
Would be interested to know what is on it?
Try activating it with:
SYSTEM <ENTER>
*/12288 <ENTER>
(Could have different entry points though)
Cheers,
Leslie
Nice find.
Video board on the right is the later model with full 8 bits for screen Mem, so you probably have Lower Case already.
Test with:
10 FOR T = 0 to 255
20 POKE 15360+T,T
30 NEXT T
40 GOTO 40
You also have some kind of expansion ROM fitted in the $3000 area (The ceramic EPROM at the bottom left of the CPU board).
Would be interested to know what is on it?
Try activating it with:
SYSTEM <ENTER>
*/12288 <ENTER>
(Could have different entry points though)
Cheers,
Leslie