Here is a list of all related documentation pages:

GE-120 C ABI
Operating the GE-120 Console
Hybrid → per-clock conversion checklist
GE-120 micro-sequencer flow charts → gemu state map & fidelity audit
funktionalcpu deck — annotated disassembly & routine names
Backplane straps and maintenance options
GE-120 / GE-130 Instruction Set Architecture
Integrated peripherals (channels 1 and 2)
GE-120 Punched-Card Formats — Decoding Notes
Todo List