Computer Help and Support

I also built a ZX81 from kit.



I've still got most of my Atari and Sinclair stuff but it's not in collectible condition because I was always hacking it.

Before that I built two COSMAC 1802 computers. I still have the second 1802 machine, which has parts cannibalized from the first.

The earliest computers I built used telephone relays, lots of diodes, and Nixie tubes.



As someone accustomed to the architectures of the PDP-11, 1802, and 6502 processors, the architecture of the TMS9900 microprocessor used in the TI-99/4A was strange to me and I didn't have any good reason to explore it.

My favorite computer today is the Raspberry Pi. The new Raspberry Pi 400 is reminiscent of older computer-in-the-keyboard machines like the TI-99/4A or Sinclairs.

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