The following table is a summary of the channels which are known to the BIOS. One should note that further channels can be installed via Bconmap.
| Channel | Name | Meaning |
| 0 | PRT | Parallel port |
| 1 | AUX | Serial port |
| 2 | CON | Console (with VT-52-sequences) |
| 3 | MIDI | MIDI-port |
| 4 | IKBD | Intelligent Keyboard processor |
| 5 | RAWCON | Console (without control characters) |
| 6 | —— | ST-compatible serial (Modem-1) |
| 7 | —— | SCC Channel-B (Modem-2) |
| 8 | —— | TT-MFP (Serial-1) |
| 9 | —— | SCC Channel-A (Serial-2) |
Note: Output via Channel-5 (RAWCON) can be appreciably faster than via Channel-2 (CON), as the control sequences do not have to be evaluated. A further advantage arising from this is a greater supply of characters.
See also:
Bconin Bconout Bconstat Bcostat Directory U:\DEV