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INT 41 - FIXED DISK PARAMETERS (XT,AT,XT2,XT286,PS except ESDI disks)
WORD cylinders
BYTE heads
WORD starting reduced write current cylinder
(XT only, 0 for others)
WORD starting write pre-comp cylinder
BYTE maximum ECC burst length
BYTE control byte
| Control
Byte |
| Bit |
Dec |
Hex |
Description |
| 0 |
1 |
01h |
drive
option (XT only, 0 for others) |
| 1 |
2 |
02h |
| 2 |
4 |
04h |
| 3 |
8 |
08h |
set if more than 8
heads |
| 4 |
16 |
10h |
always 0 |
| 5 |
32 |
20h |
set if manufacturer's
defect map on max cylinder+1 |
| 6 |
64 |
40h |
disable ECC retries |
| 7 |
128 |
80h |
disable access retries |
BYTE standard timeout (XT only, 0 for others)
BYTE formatting timeout (XT only, 0 for others)
BYTE timeout for checking drive (XT only, 0 for others)
WORD landing zone (AT/PS2)
BYTE sectors/track (AT/PS2)
BYTE 0 |