42 lines
703 B
PHP
42 lines
703 B
PHP
;; File: floppy.inc
|
|
;;
|
|
;; Usefull links:
|
|
;; - <https://wiki.osdev.org/Floppy_Disk_Controller>
|
|
;; - <datasheet at http://www.osdever.net/documents/82077AA_FloppyControllerDatasheet.pdf>
|
|
|
|
CMOS_FLOPPY_TYPE = 0x10
|
|
|
|
FLOPPY_NONE = 0x0
|
|
FLOPPY_360KB = 0x1
|
|
FLOPPY_1_2MB = 0x2
|
|
FLOPPY_720KB = 0x3
|
|
FLOPPY_1_44MB = 0x4
|
|
FLOPPY_2_88MB = 0x5
|
|
|
|
floppy_probe:
|
|
mov al, CMOS_FLOPPY_TYPE
|
|
out CMOS_COMMAND, al
|
|
in al, CMOS_DATA
|
|
mov ah, al
|
|
and al, 0x0F
|
|
and ah, 0xF0
|
|
or al, al
|
|
jz @f
|
|
push ax
|
|
mov esi, szMsgFloppy1Found
|
|
call klog
|
|
pop ax
|
|
@@:
|
|
or ah, ah
|
|
jz @f
|
|
mov esi, szMsgFloppy0Found
|
|
call klog
|
|
@@:
|
|
ret
|
|
|
|
floppy_irq:
|
|
iret
|
|
|
|
szMsgFloppy0Found db "floppy0: Found", 0
|
|
szMsgFloppy1Found db "floppy1: Found", 0
|