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INT 41 - (NOT a vector!) FIXED DISK PARAMS (XT,AT,XT2,XT286,PS except ESDI)
SeeAlso: INT 1E,INT 46

Format of fixed disk parameters:
Offset  Size    Description
 00h    WORD    cylinders
 02h    BYTE    heads
 03h    WORD    starting reduced write current cylinder (XT only, 0 for others)
 05h    WORD    starting write pre-comp cylinder
 07h    BYTE    maximum ECC burst length
 08h    BYTE    control byte
                   bits 0-2: drive option (XT only, 0 for others)
                   bit 3:    set if more than 8 heads
                   bit 4:    always 0
                   bit 5:    set if manufacturer's defect map on max cylinder+1
                   bit 6:    disable ECC retries
                   bit 7:    disable access retries
 09h    BYTE    standard timeout (XT only, 0 for others)
 0Ah    BYTE    formatting timeout (XT only, 0 for others)
 0Bh    BYTE    timeout for checking drive (XT only, 0 for others)
 0Ch    WORD    landing zone (AT/PS2)
 0Eh    BYTE    sectors/track (AT/PS2)
 0Fh    BYTE    00h