[vcf-midatlantic] Z80 single board computer needs a good home.

William Dudley wfdudley at gmail.com
Fri Aug 13 21:07:29 UTC 2021

Wil Birkmaier has claimed this, and I will make arrangements to send it to

Thanks to all who expressed interest.

Bill Dudley

This email is free of malware because I run Linux.

On Fri, Aug 13, 2021 at 4:56 PM Wil Birkmaier <wil at birkmaier.org> wrote:

> I would be interested, I'm in Boston. Thanks!
> On Aug 13, 2021 16:48, William Dudley via vcf-midatlantic <
> vcf-midatlantic at lists.vcfed.org> wrote:
> In the late 70's I designed and produced a single board Z80 computer for
> my
> job, and I kept one for myself, and eventually used it in home automation
> projects.  I don't need this anymore, so it wants to be adopted by
> somebody
> who wants to play with a Z80 without breaking anything expensive.
> Specs:
> approx size: 11.25 x 9 inches.    double sided
> ceramic/gold Z80 with 2.4576 MHz crystal
> 6 2114 RAM installed, room for 2 more.  So 3K bytes installed, upgradable
> to 4K bytes
> 2732 EPROM installed but socket designed to take bigger parts.  EPROM is
> running a simple monitor that allows one to control the I/O ports.
> Footprints on the board for two
> more EPROMS.
> 2 Z80 DARTs, so 4 serial ports  1488 and 1489 RS232 line driver/rcvr
> installed.  Three of the serial ports are brought out in DB25 connectors.
> 1 Z80 CTC installed, room for a 2nd one.
> Footprint on the board for a Z80 PIO
> 2 74LS374 8 bit latches for I/O installed.
> Footprints on the board for an analog mux and an A/D converter, both in 28
> pin 600 mil wide packages.  No idea what part they are.
> Input power should be 5v and +/- 12v (for the RS232 output)
> The board comes with almost no documentation, but it's a double sided
> board, so it should be easy-ish to reverse engineer it, especially since
> it's half populated and there are handwritten markings for some of the
> uninstalled parts.
> The board and I are in Jackson, NJ.
> I will be going to the repair workshop at the museum this weekend, though
> I
> realize this is short notice.  I can ship this at your expense.
> Bill Dudley
> This email is free of malware because I run Linux.

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