Kicad conversion of the Thomson MO5

[sporniket]

Yes, it should be finished during novembre, if all goes well

[sporniket]

It took some time to make work the power supply adapter. It turns out the schematic had wrong values on some resistors that are part of the feedback loop around the LM311. With help from knowledgeable people on the french forum, we could assert the correct values. Same thing for the reset circuit, a wrong value (100uF instead of 1uF) gave a long delay (in the 5-10 seconds range).

Plugging a SDDrive extension (disk unit emulator using SD Card ) and a "music and game" extension (2 game controllers and a 6-bit DAC for sound), I could perform some typical activity on this remake, validating that most part of the computer are correct. I won't test the tape reader port nor the light pen port (no CRT anyway) on this assembly. I plan to get a finalized version ( actually a release candidate 2 or 3) and assemble it next spring.

2024-11-30--01-sddrive-boot.jpg (106.46 KiB) Viewed 59 times

2024-11-30--02-androides-demo.jpg (102.65 KiB) Viewed 59 times

[HigashiJun]

[sporniket]

Thanks, and here is the final timelapse :