Ted Unangst wrote: > Can you explain this? I'd think A20 issues would have been sorted out > 15 years ago.
Hi, reading gateA20.c code, I've found that only two methods for enabling the A20 line were used: the fast gate that use the I/O port 0x92 and the "classic" one that use the keyboard controller. However in newer BIOS there is a new way to enable the A20: the use of the INT15 AX=2401 function... I coded a small routine that try first to use the new routine if it is available, otherwise continue as before... Regards, Giuseppe
