Values for switch settings on original EGA/VGA |
| Value | Settings | |
|---|---|---|
|
00h |
primary MDA/HGC | secondary EGA+ 40x25 |
| 01h - 03h | primary MDA/HGC | secondary EGA+ 80x25 |
| 04h | primary CGA 40x25 | secondary EGA+ 80x25 mono |
| 05h | primary CGA 80x25 | secondary EGA+ 80x25 mono |
| 06h | primary EGA+ 40x25 | secondary MDA/HGC (optional) |
| 07h - 09h | primary EGA+ 80x25 | secondary MDA/HGC (optional) |
| 0Ah | primary EGA+ 80x25 mono | secondary CGA 40x25 (optional) |
| 0Bh | primary EGA+ 80x25 mono | secondary CGA 40x25 (optional) |