kolibrios/kernel/branches/flat_kernel/blkdev/fdc.inc

74 lines
1.6 KiB
PHP
Raw Normal View History

iglobal
;function pointers.
fdc_irq_func dd fdc_null
endg
uglobal
dmasize db 0x0
dmamode db 0x0
endg
fdc_init: ;start with clean tracks.
mov edi,0xD201
mov al,0
mov ecx,160
rep stosb
ret
fdc_filesave: ;ebx: cluster to be saved.
pusha ;returns immediately. does not trigger a write.
mov eax,ebx
add eax,31
mov bl,18
div bl
mov ah,0
add eax,0xD201
mov [eax],byte 1 ;This track is now dirty.
popa
ret
fdc_irq:
call [fdc_irq_func]
fdc_null:
ret
save_image:
call reserve_flp
call restorefatchain
pusha
call check_label
cmp [FDC_Status],0
jne unnecessary_save_image
mov [FDD_Track],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
mov [FDD_Head],0 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
mov [FDD_Sector],1 ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
mov esi,RAMDISK
call SeekTrack
save_image_1:
push esi
call take_data_from_application_1
pop esi
add esi,512
call WriteSectWithRetr
; call WriteSector
cmp [FDC_Status],0
jne unnecessary_save_image
inc [FDD_Sector]
cmp [FDD_Sector],19
jne save_image_1
mov [FDD_Sector],1
inc [FDD_Head]
cmp [FDD_Head],2
jne save_image_1
mov [FDD_Head],0
inc [FDD_Track]
call SeekTrack
cmp [FDD_Track],80
jne save_image_1
unnecessary_save_image:
mov [fdc_irq_func],fdc_null
popa
mov [flp_status],0
ret