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SurePOS 500 4846-XX5 Technical Reference
Page 25 of 63
6Ch
4
Timer Counter
1Ah
70h
1
Timer Overflow
1Ah
71h
1
Break key state
16h
72h
2
Reset Flag
74h
1
HDD operation status
13h
75h 1
Number of HDDs
attached
13h
76h 2
Reserved
13h
78h
1
LPT1 time-out
14h
79h
1
LPT2 time-out
14h
7Ah
1
LPT3 time-out
14h
7Bh 1
Reserved
7Ch
1
COM1 time-out
7Dh
1
COM2 time-out
7Eh
1
COM3 time-out
7Fh
1
COM4 time-out
80h
2
Keyboard buffer start ptr
16h
82h
2
Keyboard buffer end ptr
16h
84h
7
Video info
10h
89h 2
Reserved
8Bh
1
Floppy media control
13h
8Ch
1
HDD Controller status
13h
8Dh 1
HDD Controller error
status
13h
8Eh
1
HDD Interrupt control
13h
8Fh 1
Reserved
90h
1
Floppy 0 media status
13h
91h
1
Floppy 1 media status
13h
92h
1
Floppy 2 media status
13h
93h
1
Floppy 3 media status
13h
94h
1
Drive 0 current cylinder
13h
95h
1
Drive 1 current cylinder
13h
96h 1
Keyboard mode state &
flags
16h
97h
1
Keyboard LED flags
16h
98h
2
User Wait flag offset
15h
9Ah
2
User wait flag segment
15h
9Ch 2
Low word of user wait
count
15h
9Eh 2
High word of user wait
count
15h
A0h
1
Wait active flag
15h
A1h 7
Reserved
A8h
4
Video info
10h
ACh 54h
Reserved
100h
1
Print Screen status
05h