5

One thing I can say for certain: installing an earlier version of MS-DOS could not have made anything worse (or better, anyway). Both MS-DOS 6.22 and 7.x (the version built into Windows 95) rely on BIOS interrupt service 0x16 to access the keyboard. But that same thing also makes the fact that the keyboard is fully functional during the POST stage ...


1

Many vintage PCs have a PS/2 port that can be configured (via jumpers, BIOS, or both) to work as either PS/2 keyboard, PS/2 mouse, or combined keyboard+mouse with a Y-cable adapter. Having the port configured differently than what is actually connected can confuse software and drivers and prevent the keyboard from working. However, the keyboard might still ...


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