Recent content by RayS666

Hi, thanks for the input.. the story so far... the rom in skt1 was blank, not only blank but unprogrammable even after UV. when i burned a new copy it would boot but be in perpetual 'break point' mode until the stack full caused a reset. I traced this to a 'misbehaving rom0, looked ok in the...

Thank you, I pulled down the roms from mame, so at least that eliminates the blank rom issue, can now move on the the next issue :)

I have been restoring one of these machines and run into a problem... After getting past the broken pins, dry joints, and bad IC sockets I have it narrowed down to 2 of the roms, the HEK1A SKT1 (2732) is blank, and the 2716 in IC5 has patches of &FF in 0100-01FF & 0400-04FF, I am not sure this...

OK, some progress, after getting past the broken pins, dry joints, and bad IC sockets I have it narrowed down to 2 of the roms, the HEK1A SKT1 (2732) is blank, and the 2716 in IC5 has patches of &FF in 0100-01FF & 0400-04FF, I am not sure this is right though it could be by design. I really need...

Yeah, got that and watched the video, these must be extremely rare as there is next to no information on the entire interweb. I wouldn't care I actually did this course back in 1984 but at that time we had to return the unit!

Don't know what went wrong with the first attempt at a post (I blame the AI running this sim!) Hello from the UK. Ex. Comms/Electronics/IT Engineer, now retired, started to collect (again) all the old 8bit computers of my youth, including but not limited to: MK14, UK101, BBC B, Ataris, etc...

oops. Senior (very) moment, my confusion started to set in when we stopped using valves and the telegraph system!

Hello from the UK. Ex. Comms/Electronics/IT Engineer, now retired, started to collect (again) all the old 8bit computers of my youth, including but not limited to: MK14, UK101, BBC B, Ataris, etc. Recently built a few Z80/6502 systems and looking to collect more. Also acquired a HEKTOR PT502...

It's a long shot considering the timescales but does anyone have any information, rom images, etc, for the HEKTOR PT502 and its peripheral board? I have just acquired one, faulty, and the previous person suggested that it had 'many' faults!, so just trying to cover all bases?