| ??? 06/07/06 19:19 Read: times |
#117974 - what host does to PS/2 keyboard at boot? Responding to: ???'s previous message |
Keyboard runs own POST at power-on and after a while (400ms? I don't recall but it's important) sends the 0xAA if the POST is OK. Once the PC sees this it configures the keyboard which is usually a flurry of commands. If the keyboard gets any of them wrong, the PC usually pretends the keyboard isn't there.
GB |
| Topic | Author | Date |
| what host does to PS/2 keyboard at boot? | 01/01/70 00:00 | |
| what host does to PS/2 keyboard at boot? | 01/01/70 00:00 | |
| different for different OS | 01/01/70 00:00 | |
| I think it's more a case of the BIOS | 01/01/70 00:00 | |
| further explanation | 01/01/70 00:00 | |
| Codes at startup | 01/01/70 00:00 | |
| startup codes | 01/01/70 00:00 | |
| Codes at startup | 01/01/70 00:00 | |
| Hold the lines low until KB startup | 01/01/70 00:00 | |
| use half of this | 01/01/70 00:00 | |
| Protocol and MORE | 01/01/70 00:00 | |
| Answer all PC queries | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 | |
| Answer all PC queries | 01/01/70 00:00 | |
| Also check this link | 01/01/70 00:00 | |
| POR??? | 01/01/70 00:00 | |
| Re: POR??? | 01/01/70 00:00 | |
| Two methods | 01/01/70 00:00 | |
| ps2 | 01/01/70 00:00 | |
| eh? | 01/01/70 00:00 | |
problem pretty much resolved | 01/01/70 00:00 |