Don Superfo
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Jan 06,2025
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ZX Max 128 Issue 5

ZX Spectrum 128 Clone base on CLPD EPM7128S
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Published: Jan 06,2025
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Computers & USB
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  • I can't implement R112 and C65 because I made them with the initial Gerber file. Will MIDI work without these?

    Mar 29,20253 Comments
    Don Superfo 2025-04-01 12:37:58Reply

    The first version I connect pin 38 (RST) of SAM2695 to pin 26 (RST) of Z80 and I found it make Z80 not stable. In theory it should work. When you build this board, do not solder SAM2695 and related components, make sure everything work first. After you solder SAM2695 and related components and the board doesn't work try cut the trace between pin 38 of SAM2695 and pin 26 of Z80 and add R112 and C65.

    kazmat 2025-04-06 18:32:30Reply
    Reply@ Don Superfo：

    At first I used Zilog's Z80 (NMOS 6MHZ) but DivMMC did not work, so I replaced it with TOSHIBA's TMPZ84C00AP-6 and it worked fine. I tried to play MIDI with it, but it worked fine without R112 and C65.

    Don Superfo 2025-04-07 10:24:08Reply
    Reply@ kazmat：

    That's great! thank you for let me know so I can tell others if they have the same problem problem or order the early version of pcb.

    Reply

  • Does the ULA include ULA+ ?

    Jan 14,20251 Comments
    Don Superfo 2025-01-14 11:57:29Reply

    No, it's not support ULA+

    Reply
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