| reg | value | descr |
|---|---|---|
| AH | 0x1A | |
| AL | 0x00 | get video display combination |
| 0x01 | set video display combination BL = active display (see table below) BH = inactive display |
| reg | descr |
|---|---|
| AL | 0x1A, if a valid function was requested in AH |
| BL | active display (AL=00, see table below) |
| BH | inactive display (AL=00) |
| 00h | |
| 01h | monochrome adapter w/ monochrome display |
| 02h | CGA w/ color display |
| 03h | reserved |
| 04h | EGA w/ color display |
| 05h | EGA w/ monochrome display |
| 06h | PGA w/ color display |
| 07h | VGA w/ monochrome analog display |
| 08h | VGA w/ color analog display |
| 09h | reserved |
| 0Ah | MCGA w/ digital color display |
| 0Bh | MCGA w/ monochrome analog display |
| 0Ch | MCGA w/ color analog display |
| FFh | unknown display type |