int 13h

[ninjarider]

got a small program that dumps the floppy data to the screen 1 sector at a time. Theres 18 sectors per track, 2 heads, and lik 80 cylinders.

Would code work

BeginingofLoop:
inc cl
cmp cl, 19
je ChangeSector
...


jump BeginingofLoop

ChangeSector:
mov cl, 1
xor dh, 1
cmp dh, 1
je BeginingofLoop
inc ch
jump BeginingofLoop

[sinsi]

Code Select Expand


    sub ch,ch    ;start track 0
DoTrack:
    sub dh,dh    ;start head 0
DoSide:
    mov cl,1     ;start sector 1
DoSector:
    ;read one sector
    ;display it or whatever
    inc cl
    cmp cl,18
    jbe DoSector
    inc dh
    cmp dh,1
    jbe DoSide
    inc ch
    cmp ch,80
    jbe DoTrack


[ninjarider]

with the code you pasted wouldn't it be cmp cl, 19 or is it cmp al, 18

[sinsi]

18 with JBE, 19 with JB

oops, should also be

Code Select Expand


    cmp ch,79
    jbe DoTrack

since track is 0..79

[ninjarider]

thnx. i'll check it out tonight to see if it works the way it should.