FVBLOCK STRUC
fvSpecFunc db 0 ;special functions (must be zero)
fvHead dw ? ;head to format/verify
fvCylinder dw ? ;cylinder to format/verify
FVBLOCK ENDS
The FVBLOCK structure specifies the head and cylinder to format or verify.
fvSpecFunc
Must be zero.
fvHead
Specifies the number of the read/write head. The head number is used to determine the track to format or verify.
fvCylinder
Specifies the number of the cylinder. The cylinder number is used to determine the track to format or verify.
Interrupt 21h Function 440Dh Minor Code 42h Format Track on Logical Drive
Interrupt 21h Function 440Dh Minor Code 62h Verify Track on Logical Drive