DIGITAL-LOGIC Microspace MSM586SEN Technical User Manual page 173

DIGITAL-LOGIC AG
I/O Ad- Read/Write
dress Status
0173h R / W
0174h R / W
0175h R / W
0716h R / W
0177h R
0177h W
01F0h R / W
01F1h R
01F1h W
01F2h R / W
01F3h R / W
01F4h R / W
01F5h R / W
Description
Sector number for hard disk 1
Number of cylinders (low byte) for hard drive 1
Number of cylinders (high byte) for hard drive 1
Drive/head register for hard drive 1
Status register for hard drive 1
Command register for hard drive 1
Data register base port for hard drive 0
Error register for hard drive 0
Diagnostic mode
bits 7-3 = Reserved
bits 2-0 = Errors
0001 No errors
0010 Controller error
0011 Sector buffer error
0100 ECC device error
0101 Control processor error
Operation mode
bit 7 = Block
0 Bad block
1 Block not bad
bit 6 = Error
0 No error
1 Uncorrectable ECC error
bit 5 = Reserved
bit 4 = ID
0 ID located
1 ID not located
bit 3 = Reserved
bit 2 = Command
0 Completed
1 Not completed
bit 1 = Track 000
0 Not found
1 Found
bit 0 = DRAM
0 Not found
1 Found (CP-3022 always 0)
Write precomposition register for hard drive 0
Sector count for hard disk 0
Sector number for hard drive 0
Number of cylinders (low byte) for hard drive 0
Number of cylinders (high byte) for hard drive 0
57
MSM586SEN/SEV Manual V1.5E
Continued...