This morning, I wired 65C51 and 65C22 IRQ lines with AND logic and then tested handling interrupts from both in software. I'm a step closer to having the connections for this machine finalized
and moving from breadboards to either wire wrap or PCB, neither of which I've done before.

A quick search suggests it costs less to get multiple smaller PCBs than a single larger one. If I go with PCB, I may put processor, VIAs, CIAs, ROM, RAM, and addressing decoding and glue logic
on one board, the LCD on another board, forthcoming sound generation hardware on a
3rd board, and so on.

If I go with wire wrap instead, increasing prototype board size doesn't affect cost as much.
So I might try to get everything I can on one board.


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How about an inexpensive motherboard layout with right angle header pins like the RC2014?


@oranje I'll def. take another look at RC2014 for inspiration. I met and talked to Spencer, its creator, at the hackaday con, btw.

As a complete beginner, I just need to dive in: do a couple hours research on PCB construction and try the PCB tool in kicad.

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