Start date Name Description Status
2021-03-27 Sinclair QL

Issue 7 PCB

  • Faulty keyboard membrane
 In progress
2021-03-13 Sinclair ZX81 E

Issue One / 2C184E ULA / Dual RAM ICs

  • Bad keyboard membrane
  • Composite mod
 Completed
2021-03-13 Sinclair ZX81 D

Issue 3 / 2C184E ULA / Single RAM IC

  • Composite upgrade
  • 16K ram upgrade
 Completed
2021-03-13 Sinclair ZX81 C

Issue 1 / 2C210E ULA / Dual RAM ICs

  • Faulty ULA replaced with vLA81
  • 16K ram upgrade
 Completed
2021-03-13 Sinclair ZX81 B

Issue 1 / 2C184E ULA / Single RAM IC

  • Composite mod
  • Faulty Z80 CPU
  • Broken keyboard membrane
  • 16K ram upgrade
 Completed
2021-03-13 Sinclair ZX81 A

Issue 1 / 2C184E ULA / Dual RAM ICs

  • Composite mod
  • 16K ram upgrade
 Completed