Witchy
Experienced Member
Hi Folks,
After a lot of virtual hair tearing, desoldering, NOP generating and logic analysing on my PET2001-32N I've reached a question: Has anyone here actually put the BASIC2 ROM set from Zimmers in a UK 2001/3xxx machine? I ask because I don't have another machine easily available since my 3032 is next on the ToDo list and I'm baffled since neither the physical ROM set of:
901465-01 (UD6)
901465-02 (UD7)
901447-24 (UD8)
902465-03 (UD9)
or the BASIC2 side of my ROM/RAM board will boot in this machine - I just get a blank screen, no garbage, just blank. I've been reading a few things that say the 2xxx/3xxx non-CRTC video is 60hz only but surely that's just in the US?
Anyway, tonight I burnt a BASIC4 set with a non-CRTC 50hz editor (normal keyboard) and got a constant monitor prompt which means either the DIAG pin is pulled low on the user port or BASIC isn't starting. Buzzing out the previously unused ROM slot D5 showed a fault with one of the address lines so I removed the white socket and replaced it with a turned pin one like I've already done for D6/7/8/9. Success!
So, anyone? I suppose I could leave it at BASIC4...
Cheers
Witchy
After a lot of virtual hair tearing, desoldering, NOP generating and logic analysing on my PET2001-32N I've reached a question: Has anyone here actually put the BASIC2 ROM set from Zimmers in a UK 2001/3xxx machine? I ask because I don't have another machine easily available since my 3032 is next on the ToDo list and I'm baffled since neither the physical ROM set of:
901465-01 (UD6)
901465-02 (UD7)
901447-24 (UD8)
902465-03 (UD9)
or the BASIC2 side of my ROM/RAM board will boot in this machine - I just get a blank screen, no garbage, just blank. I've been reading a few things that say the 2xxx/3xxx non-CRTC video is 60hz only but surely that's just in the US?
Anyway, tonight I burnt a BASIC4 set with a non-CRTC 50hz editor (normal keyboard) and got a constant monitor prompt which means either the DIAG pin is pulled low on the user port or BASIC isn't starting. Buzzing out the previously unused ROM slot D5 showed a fault with one of the address lines so I removed the white socket and replaced it with a turned pin one like I've already done for D6/7/8/9. Success!
So, anyone? I suppose I could leave it at BASIC4...
Cheers
Witchy