Wang 720A Machine Log

This is the restoration and preservation log for DoPECC’s Wang 720A Calculator, Serial 870019, dated September 1970.

1 June 2024 Sticky: Faults Found/Fixed
S/N 870019 - List of Faults Found & Fixed
20 July 2024 First Startup
Starting and Testing
14 July 2024 Volt Clamps, ROM Emulator
Safety and ROM replacement
9 July 2024 Reading and Recovering Microcode
Inspecting and attempting to read the Wang 720's P720-2A microcode ROM, part of a wider wire-ROM sensing failure under investigation
20 June 2024 Inspection and Cleaning
Inspection and cleaning of a dirty but complete Wang 720, with its wired backplane and compression-clip connections