| System variables

5CB6: Channel information

Initialised by the routine at NEW (from the initial channel information table), read by the routines at CHAN_FLAG, CLOSE_2 and OPEN, and updated by the routine at KEY_INPUT. For each channel the output routine address comes before the input routine address and the channel's code.
CHINFO | 5CB6 | DEFW PRINT_OUT | Keyboard.
| 5CB8 | DEFW KEY_INPUT
| 5CBA | DEFB "K"
| 5CBB | DEFW PRINT_OUT | Screen.
| 5CBD | DEFW REPORT_J
| 5CBF | DEFB "S"
| 5CC0 | DEFW ADD_CHAR | Work space.
| 5CC2 | DEFW REPORT_J
| 5CC4 | DEFB "R"
| 5CC5 | DEFW PRINT_OUT | Printer.
| 5CC7 | DEFW REPORT_J
| 5CC9 | DEFB "P"
| 5CCA | DEFB $80 | End marker.