1st 64 K RAM chip or data line failure - bit 4
Unexpected interrupt in Protected Mode
1st 64 K RAM chip or data line failure - bit 5
RAM test in progress or failure above address
0FFFFh
1st 64 K RAM chip or data line failure - bit 6
1st 64 K RAM chip or data line failure - bit 7
Interval Timer Channel 2 test in progress or
failure
1st 64 K RAM chip or data line failure - bit 8
Time-Of-Day Clock test in progress or failure
1st 64 K RAM chip or data line failure - bit 9
1st 64 K RAM chip or data line failure - bit A
1st 64 K RAM chip or data line failure - bit B
1st 64 K RAM chip or data line failure - bit C
1st 64 K RAM chip or data line failure - bit D