Vintage PC pages
Prodest PC1 : Pinouts
Video 1
Video 1 contains various signals which can be used to connect the PC1 to a television. Pin numbers are given for creating a PC1-to-SCART lead.
| Pin number | Meaning | SCART pin number |
|---|---|---|
| 1 | Blue video | 7 |
| 2 | Green video | 11 |
| 3 | Red video | 15 |
| 4 | Ground | 5, 9, 13, 17 and 18 |
| 5 | Sync | 20 |
| 6 | unknown | not connected |
| 7 | Composite video | not connected |
| 8 | Function switching | 8 |
Mouse
The mouse port is for a quadrature mouse, like the one used on Amstrad's early PCs. However, the pinout is different. This table lists the pins, including pin numbers for a lead that can be used to connect a PC1512 mouse to the PC1.
| Pin number | Meaning | Amstrad mouse pin number |
|---|---|---|
| 1 | Right button | 9 |
| 2 | Left button | 6 |
| 3 | XA | 1 |
| 4 | YB | 4 |
| 5 | +5v | 7 |
| 6 | YA | 3 |
| 7 | XB | 7 |
| 8 | Ground | 8 |
| 9 | ENA | 8 |
If ENA is not pulled low, the PC1 assumes a joystick is connected to the mouse port. It's possible that a standard Atari pinout is used in this case.
John Elliott 12 June 2004