| Data

05551: THE 'INITIAL CHANNEL INFORMATION'

Used by the routine at NEW, which copies the information from here to CHINFO. Initially there are four channels - 'K', 'S', 'R', and 'P' - for communicating with the 'keyboard', 'screen', 'work space' and 'printer'. For each channel the output routine address comes before the input routine address and the channel's code.
CHANINFO | 05551 | DEFW PRINT_OUT | Keyboard.
| 05553 | DEFW KEY_INPUT
| 05555 | DEFB "K"
| 05556 | DEFW PRINT_OUT | Screen.
| 05558 | DEFW REPORT_J
| 05560 | DEFB "S"
| 05561 | DEFW ADD_CHAR | Work space.
| 05563 | DEFW REPORT_J
| 05565 | DEFB "R"
| 05566 | DEFW PRINT_OUT | Printer.
| 05568 | DEFW REPORT_J
| 05570 | DEFB "P"
| 05571 | DEFB 128 | End marker.