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- Firmware CardCard to put a 2K or 4K EPROM anywhere in the memory map.
- Letters: Can Anybody Help?Writer seeks program to plot stationary satellite positions for use with TVRO Earth Station.
- Letters: Help!, Penance!One writer seeks service manual for ZX81; other points out that many support options available for Timex/Sinclair 1000.
- Letters: Last CallSAMS Computerfacts technical service data for Timex-Sinclair 1000 and Sinclair ZX-81 mentioned.
- Letters: TimexG.S. of Cheektowaga, NY, laments lack of info about Timex/Sinclair 1000.
- Letters: ZX81's OK!Fan defends the ZX81.
- Machine Code Development System For Your Timex Sinclair 1000Turn your Timex Sinclair 1000 or Sinclair ZX81 into a high-speed, machine-code development system.
- Machine Code Development System For Your Timex Sinclair 1000 Part IITurn your Timex Sinclair 1000 or Sinclair ZX81 into a high-speed, machine-code development system.
- Voice ReproductionMachine language tools to sample and playback voice recordings.
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