Click a net label to trace it — endpoints colour-coded input · output · in/out — click an IC box (either panel) to select it in both, click again to deselect (multi-select OK), Esc clears all. Use the IC rail on the far left to jump straight to a chip. A net name shown muted like this and prefixed $ is ours - a node the 1985 drawing leaves unlabelled; every other name was read off the drawing. Hover a pin for its net's story.
Notes and open questions on this sheet (22)
Not yet walked against a physical board. The 235 pins and 72 nets on this sheet were read from the original drawing and cross-checked against MAME; every IC is still marked auto. Part numbers and pin assignments are what the drawing shows, not what has been metered.
Extraction uncertainty: RC4 pin 1A: the sheet prints '5' where every other H-IC001 prints '2'. Pin 5 is already used by 2Y on the same device, so '5' cannot be right. There is a small proof-mark scribble just above the digit. Recorded as pin 2. Ask Robert to buzz RC4 pin 2 to edge pin T on the board.
Extraction uncertainty: 3A outputs O5/O6/O7 are drawn inside the symbol but carry no printed pin number and no wire. Pin numbers 10/9/7 assumed from the standard '138 pinout, not read from the drawing.
Extraction uncertainty: IN0..IN4 are drawn with NO overbar even though they are '138 outputs and drive active-low enables. Recorded unbarred, as printed.
Extraction uncertainty: The five DIP-switch positions labelled with circled digits: 2A and 1A each carry a circled 1 near the top of the symbol and a circled 8 near the bottom, next to the text '8P'. These read as parts-list callouts rather than switch numbering, since the drawn row pairing (pin 9 with pin 8 at the top, pin 16 with pin 1 at the bottom) makes the top row switch element 8 and the bottom row element 1. Electrical mapping is unambiguous either way and is what is recorded.
Extraction uncertainty: 'AB0' is hand-lettered 'ABO' (letter-O shape) but is unambiguously address bit 0 given AB1/AB2 below it.
Discrepancy vs IC index: RC4 1A pin number printed as '5', conflicting with 2Y='5' on the same package and with 1A='2' on RC1/RC2/RC3/RC5.
Discrepancy vs IC index: 8A leaves DB2 and DB3 undriven at 0x3000 - only six of the eight SYSTEM bits exist, and the '367 is a hex buffer so there is no spare channel. Those two bits will read back as whatever RA3 leaves them at (high).
Discrepancy vs IC index: 4A and 5A leave DB6/DB7 undriven at 0x3001/0x3002 for the same reason.
Discrepancy vs IC index: No DIP-switch function legend (coinage / lives / difficulty / bonus life) is printed anywhere on this sheet. If that table exists it is on another sheet or in the manual text, not here.
Discrepancy vs IC index: Vcc/GND are not drawn for any of the 74-series parts (3A, 4A, 5A, 8A, 1B, 2B). Only the H-IC001 modules show their Vcc/GND pins.
Extraction uncertainty: RC4 pin 1A: the sheet prints '5' where every other H-IC001 prints '2'. Pin 5 is already used by 2Y on the same device, so '5' cannot be right. There is a small proof-mark scribble just above the digit. Recorded as pin 2. Ask Robert to buzz RC4 pin 2 to edge pin T on the board.
Extraction uncertainty: 3A outputs O5/O6/O7 are drawn inside the symbol but carry no printed pin number and no wire. Pin numbers 10/9/7 assumed from the standard '138 pinout, not read from the drawing.
Extraction uncertainty: IN0..IN4 are drawn with NO overbar even though they are '138 outputs and drive active-low enables. Recorded unbarred, as printed.
Extraction uncertainty: The five DIP-switch positions labelled with circled digits: 2A and 1A each carry a circled 1 near the top of the symbol and a circled 8 near the bottom, next to the text '8P'. These read as parts-list callouts rather than switch numbering, since the drawn row pairing (pin 9 with pin 8 at the top, pin 16 with pin 1 at the bottom) makes the top row switch element 8 and the bottom row element 1. Electrical mapping is unambiguous either way and is what is recorded.
Extraction uncertainty: 'AB0' is hand-lettered 'ABO' (letter-O shape) but is unambiguously address bit 0 given AB1/AB2 below it.
Discrepancy vs IC index: RC4 1A pin number printed as '5', conflicting with 2Y='5' on the same package and with 1A='2' on RC1/RC2/RC3/RC5.
Discrepancy vs IC index: 8A leaves DB2 and DB3 undriven at 0x3000 - only six of the eight SYSTEM bits exist, and the '367 is a hex buffer so there is no spare channel. Those two bits will read back as whatever RA3 leaves them at (high).
Discrepancy vs IC index: 4A and 5A leave DB6/DB7 undriven at 0x3001/0x3002 for the same reason.
Discrepancy vs IC index: No DIP-switch function legend (coinage / lives / difficulty / bonus life) is printed anywhere on this sheet. If that table exists it is on another sheet or in the manual text, not here.
Discrepancy vs IC index: Vcc/GND are not drawn for any of the 74-series parts (3A, 4A, 5A, 8A, 1B, 2B). Only the H-IC001 modules show their Vcc/GND pins.
Edge connector: IDENTICAL to Commando 85605, pin for pin. Confirmed from the EDGE CONNECTOR tables, GnG manual page 1 and Commando manual page 8. Both are the same 56-way part (Hirose CR7E-56DA-3.96E or KEL 1168-056-009) with the keyway at J/8. GND 1/2/A/B, +5 3/4/C/D, R=5 G=E B=6 SYNC=F, GND 7/H, 1P controls 9-15 and 2P K-S, 1P/2P SELECT 16/T, (D4)/(D5) 17/U, COIN1/COIN2 18/V, GND 19/W, +12V COMMON 22/Z, COUNTER1/2 23/a, SP+/SP- 24/b, +12 25/c, GND(12V) 26/d, GND 27/28/e/f. One JAMMA converter therefore serves both machines.
