Assembled the Last Two Boards
I will skip the board testing and will code the Monitor to the FlashROM (AT29C256).
You never know I may get lucky.
I designed and build a Nano controlled FlashROM programmer a while back:
Programmer Failure?
I loaded the AT29C256 chip into the stripboard version of my Flash ROM programmer, uploaded my code but it did not work (i.e. load). Stripboard sometimes needs to be cleaned if it has been sitting around for a while. Still no. Found the PCB version of the programmer and still no? Salvaged a known good chip and the programmer was fine. Another bad AT29C256 chip! I have had a few bad chips so I was sort of expecting it.
Loaded the chip into the Page Memory board and no. So I need to test the board.
AlanX
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