I/O Map
The following table lists the main I/O definitions of the VELF.
| Q |
- Video Terminal: serial output - Sound on/off: fixed tone - Cassette out |
| EF1 | CDP 1861 display: display status |
| EF2 |
- Video Terminal: serial inpput - Casssette in |
| EF3 | Keyboard pressed |
| EF4 | If EF4=0 IN button is pressed |
| OUT 1 | CDP 1861 display: display off |
| OUT 2 | Key latch |
| OUT 4 | TIL 311 data display |
| INP 1 | CDP 1861 display: display on |
| INP 4 | Data switch panel input |