Amazing job duplicating this board, both electrically and visually. Thanks for letting me tag along!
Just waiting for a few oddball parts (like the darn 7445 TTL) to arrive to finish up, but seeing System Monitor 3.3 on the screen was very rewarding!
- Gary
Well, if you need another challenge, it would be fun to duplicate the DD board
I recall that there is code for the CTC in some of MicroCornucopia's stuff.
I take it that's a different display than the early photos with the Tetris game? The resolution looks very nice here, compared to those earlier photos. Was that because those were flat panels and the conversion from composite to digital? Or do you think the resolution was en route to be improved on the flat panel displays?
This is wonderful! Very nice work.
I have a Big Board II which I'm trying to duplicate with KiCad. Is it possible to obtain a PCB for testing?
Best regards,
Edzard
Video and Keyboard both running nicely now. I was getting some jitter (a common BB1 problem) and changing U11 to a 74F04 seemed to improve it.
The board also works nicely with XMON4 (2716x2) which adds a few features (but removes the memory test).
Printed up your RT-50B case, very nice.
Getting ready to hook up FlashFloppy once my 7445 arrives (or I may just steal one from another system). What disk image(s) did you use?
Thanks!