(At the computer)
50 PIN MALE EDGE the computer.
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | +5v |  |
Power, 300mA |
| 2 | /CNTRL2 |  |
Game adapter control signal |
| 3 | +12v | |
Power, 100mA |
| 4 | -12v | |
Power, 50mA |
| 5 | /CNTRL1 | |
Game adapter control signal |
| 6 | /WAIT | |
Z80 WAIT |
| 7 | /RST | |
Z80 RST |
| 8 | CPU CLK | |
Buffered 3.58MHz system clock |
| 9 | A15 | |
Buffered Address bus |
| 10 | A14 | |
" |
| 11 | A13 | |
" |
| 12 | A12 | |
" |
| 13 | A11 | |
" |
| 14 | A10 | |
" |
| 15 | A9 | |
" |
| 16 | A8 | |
" |
| 17 | A7 | |
" |
| 18 | A6 | |
" |
| 19 | A5 | |
" |
| 20 | A4 | |
" |
| 21 | A3 | |
" |
| 22 | A2 | |
" |
| 23 | A1 | |
" |
| 24 | A0 | |
" |
| 25 | /RFSH | |
RAM expansion refresh |
| 26 | /EXCSR | |
Video-CPU write select |
| 27 | /M1 | |
Z80 M1 |
| 28 | /EXCSW | |
CPU-Video write select |
| 29 | /WR | |
Z80 WR |
| 30 | /MREQ | |
Z80 MREQ |
| 31 | /IORQ | |
Z80 IORQ |
| 32 | /RD | |
Z80 RD |
| 33 | D0 | I/O | Buffered Data Bus |
| 34 | D1 | I/O | " |
| 35 | D2 | I/O | " |
| 36 | D3 | I/O | " |
| 37 | D4 | I/O | " |
| 38 | D5 | I/O | " |
| 39 | D6 | I/O | " |
| 40 | D7 | I/O | " |
| 41 | CSOUND | |
Audio input signal |
| 42 | /INT | |
Z80 INT |
| 43 | /RAMDIS | |
Disable user RAM |
| 44 | /ROMDIS | |
Disable basic ROM |
| 45 | /BK32 | |
Enable bank 32 Memory (8000-ffff) |
| 46 | /BK31 | |
Enable bank 31 Memory (0000-7FFF) |
| 47 | /BK22 | |
Enable bank 22 Memory (8000-FFFF) |
| 48 | /BK21 | |
Enable bank 21 Memory (0000-7FFF) |
| 49 | GND | - | System Ground |
| 50 | GND | - | System Ground |