Gakken Invader 2000 Chip labeled MP1604 MSHL^8218 die labeled 1370A MP1604 L/R switch, Fire button, 1/2 player switch VFD piezo TMS1024 TMS1370 SDIP 28 pinout 1 R11 - TMS1024-24 + diode to 1P/2P switch 2 R12 - TMS1024-23 + diode to L/R switch 3 R13 - TMS1024-6 4 VDD - battery - 5 K1 - 1P/2P switch + L/R switch 6 K2 - 1P/2P switch + L/R switch 7 K4 - VSS 8 K8 - fire button 9 INIT - VDD 10 O7 - TMS1024-3 11 O6 - TMS1024-2 12 O5 - TMS1024-28 13 O4 - TMS1024-27 14 O3 - N/C 15 VSS - battery + 16 OSC1 - 47pF disc cap, 36K resistor 17 OSC2 - OSC1 18 R0 - piezo 19 R1 - VFD row 1 (bottom) 20 R2 - VFD row 2 21 R3 - VFD row 3 22 R4 - VFD row 4 23 R5 - VFD row 5 24 R6 - VFD row 6 25 R7 - VFD row 7 26 R8 - VFD row 8 27 R9 - VFD digits 28 R10 - VFD digits TMS1024 1 V+ - battery + 2 H3 - TMS1370-11 3 H4 - TMS1370-10 4 /CE - V- 5 MS - V+ (latch mode) 6 STD - TMS1370-3 7 4A - column 2 bomb (dropped by enemy) 8 4B - column 1 bomb 9 4C - column 1 bullet (fired up by player) 10 4D - column 1 enemy 11 5A - column 3 bullet 12 5B - column 3 enemy 13 5C - column 2 bullet 14 5D - column 2 enemy 15 6A - column 4 bullet 16 6B - column 4 enemy 17 6C - column 4 bomb 18 6D - column 3 bomb 19 7A - stars 20 7B - column 5 bomb 21 7C - column 5 bullet 22 7D - column 5 enemy 23 S0 - TMS1370-2 24 S1 - TMS1370-1 25 S2 - V+ (ports 4-7) 26 V- - battery - 27 H1 - TMS1370-13 28 H2 - TMS1370-12 input matrix K1 K2 K4 K8 R11 1P 2P -- -- R12 L R -- -- VSS -- -- jumper Fire VFD Segments (row 1 bottom, row 8 top, col 1 left, col 5 right, digits 54321 (dig 5 is always 1, digs 2 and 1 are always 0) row 1 row 2 row 3 row 4 row 5 row 6 row 7 row 8 digits digits R1 R2 R3 R4 R5 R6 R7 R8 R9 R10 TMS1024 col2 4A expl xx bomb bomb bomb bomb bomb xx xx xx col1 4B expl bomb bomb bomb bomb bomb bomb xx xx right life col1 4C bullet bullet bullet bullet bullet bullet bullet lwr enemy xx left life col1 4D gun enemy enemy enemy enemy enemy enemy upr enemy xx upr life col3 5A bullet bullet bullet bullet bullet bullet bullet lwr enemy dig 1 (0) dig 5 (1) col3 5B gun enemy enemy enemy enemy enemy enemy upr enemy dig 2 (0) xx col3 5C bullet lwr shield bullet bullet bullet bullet bullet lwr enemy xx xx col2 5D gun upr shiled enemy enemy enemy enemy enemy upr enemy xx xx col4 6A bullet lwr shield bullet bullet bullet bullet bullet lwr enemy dig 3 D dig 4 D col4 6B gun upr shield enemy enemy enemy enemy enemy upr enemy dig 3 C dig 4 C col4 6C expl xx bomb bomb bomb bomb bomb xx dig 3 B dig 4 B col3 6D expl bomb bomb bomb bomb bomb bomb xx dig 3 A dig 4 A mixed 7A xx xx c2 B/c3 R c1 R/c4 B c3 R c2 B/c5 R c1 R/c4 B xx xx xx col5 7B expl bomb bomb bomb bomb bomb bomb xx dig 3 G dig 4 G col5 7C bullet lwr shield bullet bullet bullet bullet bullet lwr enemy dig 3 F dig 4 F col5 7D gun enemy enemy enemy enemy enemy enemy upr enemy dig 3 E dig 4 E