mk3
Member level 2
PC Keyboard at bootstrap
I'm interfacing a device acting as an AT keyboard to a PC.
After reading all the docs I was able to find on the 'net I've made a board with a micro that try to emulate a pc at keyboard. The circuit and program seems to work, except for the emulated keyboard at PC bootstrap.
So I disabled keyboard check in the BIOS at startup. This works on some computer, but not with others. Also with keyb. test disabled, the PC hangs at startup waiting for something forever after the BIOS screen and the memory check...
Anyone has info on this or can explain better to me? How can I find more info about timings in keb<->pc comm. at bootstrap, or a working example includingthe bootstrap and keyboard test phase? :?:
I'm interfacing a device acting as an AT keyboard to a PC.
After reading all the docs I was able to find on the 'net I've made a board with a micro that try to emulate a pc at keyboard. The circuit and program seems to work, except for the emulated keyboard at PC bootstrap.
So I disabled keyboard check in the BIOS at startup. This works on some computer, but not with others. Also with keyb. test disabled, the PC hangs at startup waiting for something forever after the BIOS screen and the memory check...
Anyone has info on this or can explain better to me? How can I find more info about timings in keb<->pc comm. at bootstrap, or a working example includingthe bootstrap and keyboard test phase? :?: