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Drive Control Register, I/O Port 3F6h/376h (Write Only)
Bit
Function
7..3
Reserved
2
Controller Control:
0 = Re-enable
1 = Reset
1
Interrupt Enable/Disable
0 = Disable interrupts
1 = Enable interrupts
0
Reserved
Drive Access Register, I/O Port 3F7h/377h (Read Only)
Bit
Function
7
Reserved
6
WRITE GATE- Signal Active (if set)
5..2
Head Select:
0000 = 15
1000 = 7
0001 = 14
1001 = 6
0010 = 13
1010 = 5
0011 = 12
1011 = 4
0100 = 11
1100 = 3
0101 = 10
1101 = 2
0110 = 9
1110 = 1
0111 = 8
1111 = 0
1,0
Drive Select:
00 = Disabled
01 = Drive 1 selected
10 = Drive 0 selected
11 = Invalid
Compaq Deskpro 4000 and 6000 Personal Computers
featuring the Pentium II Processor
First Edition -October 1997
Technical Reference Guide
5-7
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