I've just been getting my old EXDOS board working. I found the EPROM had stopped working (it gave different results on every read!), but I didn't have any 27128 EPROMs around, but did have some 27256, so I thought about adding the extra address line for A14 and installing EXDOS 1.3. Then I noticed the PCB already has jumpers for A14 on the board! So soldered the pin 27 jumper to A14 from 5v and put in EXDOS 1.3, but it still wouldn't boot...
I got all sorts of weird crashes (green screen, black screen, corrupted screen, reset), and on the rare occasion it made it to BASIC, :help showed no EXDOS.
So I thought maybe the Enterprise was the problem (this was my Arabic Enterprise), so I tried it on my original UK Enterprise, and to my surprise it boots to BASIC and :help shows EXDOS 1.3!
I've not replaced all the caps on the Arabic motherboard -- I'm guessing this is going to be the cause of the problem. But in-case anyone else (Zozo
) knows any other reasons why this could be happening, I thought I would ask!
I have EXDOS working again!! Now I just need to dig out a floppy drive and try and write some floppies... then maybe get the HxC...