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/kernel/trunk/blkdev/flp_drv.inc
0,0 → 1,685
;**********************************************************
; ¥¯®á।á⢥­­ ï à ¡®â  á ª®­â஫«¥à®¬ £¨¡ª®£® ¤¨áª
;**********************************************************
; €¢â®à ¨á室­®£® ⥪áâ  Šã« ª®¢ ‚« ¤¨¬¨à ƒ¥­­ ¤ì¥¢¨ç.
; €¤ ¯â æ¨ï ¨ ¤®à ¡®âª  Mario79
fdd_read_and_write:
pusha
read_sector:
cmp eax,1
jne write_sector
call save_HTS_values
call flp_readsector
call give_back_application_data
jmp fdd_read_end
write_sector:
cmp eax,2
jne fdd_read_end
call save_HTS_values
call take_data_from_application
call flp_writesector
fdd_read_end:
popa
ret
save_HTS_values:
mov [FDD_Sector],bl
mov [FDD_Head],bh
shr ebx,16
mov [FDD_Track],bl
mov [FDD_Type],bh
ret
give_back_application_data: ; ¯¥à¥á« âì ¯à¨«®¦¥­¨î
mov edi,[3010h]
mov edi,[edi+10h]
add edi,ecx
give_back_application_data_1:
mov esi,0xD000 ;FDD_DataBuffer ;0x40000
xor ecx,ecx
mov cx,128
cld
rep movsd
ret
take_data_from_application: ; ¢§ïâì ¨§ ¯à¨«®¦¥­¨ï
mov esi,[3010h]
mov esi,[esi+10h]
add esi,ecx
take_data_from_application_1:
mov edi,0xD000 ;FDD_DataBuffer ;0x40000
xor ecx,ecx
mov cx,128
cld
rep movsd
ret
flp_initialization:
; “áâ ­®¢¨âì ­®¢ë© ®¡à ¡®â稪 ¯à¥à뢠­¨ï ƒŒ„
call SetUserInterrupts
; ‚ª«îç¨âì ¬®â®à ¤¨áª®¢®¤
call FDDMotorON
; ˆ­¨æ¨ «¨§¨à®¢ âì ¯¥à¥¬¥­­ë¥
; mov [FDD_Track],0
; mov [FDD_Head],0
; mov [FDD_Sector],1
; à®¢¥á⨠४ «¨¡à®¢ªã ¨ ¯®¨áª ­ã«¥¢®© ¤®à®¦ª¨
call RecalibrateFDD
call SeekTrack
ret
flp_readsector:
call flp_initialization
; à®ç¨â âì ᥪâ®à
call ReadSectWithRetr
; call ReadSector
; cmp [FDC_Status],0
; jne @@SectorNotFound
mov [fdc_irq_func],fdc_null
; call FDDMotorOFF
ret
flp_writesector:
call flp_initialization
; ‡ ¯¨á âì ᥪâ®à
call WriteSectWithRetr
; call WriteSector
; cmp [FDC_Status],0
; jne @@SectorNotFound
mov [fdc_irq_func],fdc_null
; call FDDMotorOFF
ret
@@DiskNotFound:
ret
@@SectorNotFound:
ret
; Š®¤ë § ¢¥à襭¨ï ®¯¥à æ¨¨ á ª®­â஫«¥à®¬ (FDC_Status)
FDC_Normal equ 0 ;­®à¬ «ì­®¥ § ¢¥à襭¨¥
FDC_TimeOut equ 1 ;®è¨¡ª  â ©¬- ãâ
FDC_DiskNotFound equ 2 ;¢ ¤¨áª®¢®¤¥ ­¥â ¤¨áª
FDC_TrackNotFound equ 3 ;¤®à®¦ª  ­¥ ­ ©¤¥­
FDC_SectorNotFound equ 4 ;ᥪâ®à ­¥ ­ ©¤¥­
; Œ ªá¨¬ «ì­ë¥ §­ ç¥­¨ï ª®®à¤¨­ â ᥪâ®à  (§ ¤ ­­ë¥
; §­ ç¥­¨ï ᮮ⢥âáâ¢ãîâ ¯ à ¬¥âà ¬ áâ ­¤ àâ­®£®
; âà¥å¤î©¬®¢®£® £¨¡ª®£® ¤¨áª  ®¡ê¥¬®¬ 1,44 Œ¡)
MAX_Track equ 79
MAX_Head equ 1
MAX_Sector equ 18
; ‘ç¥â稪 ⨪®¢ â ©¬¥à
TickCounter dd ?
; Š®¤ § ¢¥à襭¨ï ®¯¥à æ¨¨ á ª®­â஫«¥à®¬ ƒŒ„
FDC_Status DB ?
; ”« £ ¯à¥à뢠­¨ï ®â ƒŒ„
FDD_IntFlag DB ?
; Œ®¬¥­â ­ ç «  ¯®á«¥¤­¥© ®¯¥à æ¨¨ á ƒŒ„
FDD_Time DD ?
; ®¬¥à ¤¨áª®¢®¤
FDD_Type db 0
; Š®®à¤¨­ âë ᥪâ®à
FDD_Track DB ?
FDD_Head DB ?
FDD_Sector DB ?
; «®ª १ã«ìâ â  ®¯¥à æ¨¨
FDC_ST0 DB ?
FDC_ST1 DB ?
FDC_ST2 DB ?
FDC_C DB ?
FDC_H DB ?
FDC_R DB ?
FDC_N DB ?
; ‘ç¥â稪 ¯®¢â®à¥­¨ï ®¯¥à æ¨¨ ç⥭¨ï
ReadRepCounter DB ?
; ‘ç¥â稪 ¯®¢â®à¥­¨ï ®¯¥à æ¨¨ ४ «¨¡à®¢ª¨
RecalRepCounter DB ?
; Ž¡« áâì ¯ ¬ï⨠¤«ï åà ­¥­¨ï ¯à®ç¨â ­­®£® ᥪâ®à
;FDD_DataBuffer: times 512 db 0 ;DB 512 DUP (?)
fdd_motor_status db 0
timer_fdd_motor dd 0
;*************************************
;* ˆˆ–ˆ€‹ˆ‡€–ˆŸ  †ˆŒ€ „ „‹Ÿ ƒŒ„ *
;*************************************
Init_FDC_DMA:
pushad
mov al,0
out 0x0c,al ; reset the flip-flop to a known state.
mov al,6 ; mask channel 2 so we can reprogram it.
out 0x0a,al
mov al,[dmamode] ; 0x46 -> Read from floppy - 0x4A Write to floppy
out 0x0b,al
mov al,0
out 0x0c,al ; reset the flip-flop to a known state.
mov eax,0xD000
out 0x04,al ; set the channel 2 starting address to 0
shr eax,8
out 0x04,al
shr eax,8
out 0x81,al
mov al,0
out 0x0c, al ; reset flip-flop
mov al, 0xff ;set count (actual size -1)
out 0x5, al
mov al,0x1 ;[dmasize] ;(0x1ff = 511 / 0x23ff =9215)
out 0x5,al
mov al,2
out 0xa,al
popad
ret
;***********************************
;* ‡€ˆ‘€’œ €‰’ ‚ Ž’ „€›• FDC *
;*  à ¬¥âàë: *
;* AL - ¢ë¢®¤¨¬ë© ¡ ©â. *
;***********************************
FDCDataOutput:
; pusha
push ax cx dx
mov AH,AL ;§ ¯®¬­¨âì ¡ ©â ¢ AH
; ‘¡à®á¨âì ¯¥à¥¬¥­­ãî á®áâ®ï­¨ï ª®­â஫«¥à
mov [FDC_Status],FDC_Normal
; à®¢¥à¨âì £®â®¢­®áâì ª®­â஫«¥à  ª ¯à¨¥¬ã ¤ ­­ëå
mov DX,3F4h ;(¯®àâ á®áâ®ï­¨ï FDC)
xor CX,CX ;ãáâ ­®¢¨âì áç¥â稪 â ©¬- ãâ
@@TestRS:
in AL,DX ;¯à®ç¨â âì ॣ¨áâà RS
and AL,0C0h ;¢ë¤¥«¨âì à §àï¤ë 6 ¨ 7
cmp AL,80h ;¯à®¢¥à¨âì à §àï¤ë 6 ¨ 7
je @@OutByteToFDC
loop @@TestRS
; Žè¨¡ª  â ©¬- ãâ
mov [FDC_Status],FDC_TimeOut
jmp @@End_5
; ‚뢥á⨠¡ ©â ¢ ¯®àâ ¤ ­­ëå
@@OutByteToFDC:
inc DX
mov AL,AH
out DX,AL
@@End_5:
; popa
pop dx cx ax
ret
;******************************************
;* Ž—ˆ’€’œ €‰’ ˆ‡ Ž’€ „€›• FDC *
;* à®æ¥¤ãà  ­¥ ¨¬¥¥â ¢å®¤­ëå ¯ à ¬¥â஢. *
;* ‚ë室­ë¥ ¤ ­­ë¥: *
;* AL - áç¨â ­­ë© ¡ ©â. *
;******************************************
FDCDataInput:
push ECX
push DX
; ‘¡à®á¨âì ¯¥à¥¬¥­­ãî á®áâ®ï­¨ï ª®­â஫«¥à
mov [FDC_Status],FDC_Normal
; à®¢¥à¨âì £®â®¢­®áâì ª®­â஫«¥à  ª ¯¥à¥¤ ç¥ ¤ ­­ëå
mov DX,3F4h ;(¯®àâ á®áâ®ï­¨ï FDC)
xor CX,CX ;ãáâ ­®¢¨âì áç¥â稪 â ©¬- ãâ
@@TestRS_1:
in AL,DX ;¯à®ç¨â âì ॣ¨áâà RS
and AL,0C0h ;¢ë¤«¨âì à §àï¤ë 6 ¨ 7
cmp AL,0C0h ;¯à®¢¥à¨âì à §àï¤ë 6 ¨ 7
je @@GetByteFromFDC
loop @@TestRS_1
; Žè¨¡ª  â ©¬- ãâ
mov [FDC_Status],FDC_TimeOut
jmp @@End_6
; ‚¢¥á⨠¡ ©â ¨§ ¯®àâ  ¤ ­­ëå
@@GetByteFromFDC:
inc DX
in AL,DX
@@End_6: pop DX
pop ECX
ret
;*********************************************
;* Ž€Ž’—ˆŠ  ›‚€ˆŸ Ž’ ŠŽ’Ž‹‹ € ƒŒ„ *
;*********************************************
FDCInterrupt:
;  §à¥è¨âì ¯à¥à뢠­¨ï
; sti
; push AX
; “áâ ­®¢¨âì ä« £ ¯à¥à뢠­¨ï
mov [FDD_IntFlag],1
; ®á« âì ª®¬ ­¤ã EOI ª®­â஫«¥àã ¯à¥à뢠­¨©
; mov AL,20h
; out 20h,AL
; pop AX
ret
;******************************************
;* “‘’€Ž‚ˆ’œ Ž‚›‰ Ž€Ž’—ˆŠ  ›‚€ˆ‰ *
;* ƒŒ„ *
;******************************************
SetUserInterrupts:
mov [fdc_irq_func],FDCInterrupt
ret
;*******************************************
;* Ž†ˆ„€ˆ  ›‚€ˆŸ Ž’ ŠŽ’Ž‹‹ € ƒŒ„ *
;*******************************************
WaitFDCInterrupt:
pusha
; ‘¡à®á¨âì ¡ ©â á®áâ®ï­¨ï ®¯¥à æ¨¨
mov [FDC_Status],FDC_Normal
; ‘¡à®á¨âì ä« £ ¯à¥à뢠­¨ï
mov [FDD_IntFlag],0
; Ž¡­ã«¨âì áç¥â稪 ⨪®¢
mov eax,[timer_ticks]
mov [TickCounter],eax
; Ž¦¨¤ âì ãáâ ­®¢ª¨ ä« £  ¯à¥à뢠­¨ï ƒŒ„
@@TestRS_2:
cmp [FDD_IntFlag],0
jnz @@End_7 ;¯à¥à뢠­¨¥ ¯à®¨§®è«®
mov eax,[timer_ticks]
sub eax,[TickCounter]
cmp eax,50 ;25 ;5 ;®¦¨¤ âì 5 ⨪®¢
jb @@TestRS_2
; jl @@TestRS_2
; Žè¨¡ª  â ©¬- ãâ
mov [FDC_Status],FDC_TimeOut
; mov [flp_status],0
@@End_7: popa
ret
;*********************************
;* ‚Š‹ž—ˆ’œ ŒŽ’Ž „ˆ‘ŠŽ‚Ž„€ "A:" *
;*********************************
FDDMotorON:
pusha
; cmp [fdd_motor_status],1
; je fdd_motor_on
mov al,[flp_number]
cmp [fdd_motor_status],al
je fdd_motor_on
; à®¨§¢¥á⨠á¡à®á ª®­â஫«¥à  ƒŒ„
mov DX,3F2h ;¯®àâ ã¯à ¢«¥­¨ï ¤¢¨£ â¥«ï¬¨
mov AL,0
out DX,AL
; ‚ë¡à âì ¨ ¢ª«îç¨âì ¬®â®à ¤¨áª®¢®¤
cmp [flp_number],1
jne FDDMotorON_B
; call FDDMotorOFF_B
mov AL,1Ch ; Floppy A
jmp FDDMotorON_1
FDDMotorON_B:
; call FDDMotorOFF_A
mov AL,2Dh ; Floppy B
FDDMotorON_1:
out DX,AL
; Ž¡­ã«¨âì áç¥â稪 ⨪®¢
mov eax,[timer_ticks]
mov [TickCounter],eax
; Ž¦¨¤ âì 0,5 á
@@dT:
mov eax,[timer_ticks]
sub eax,[TickCounter]
cmp eax,50 ;10
jb @@dT
cmp [flp_number],1
jne fdd_motor_on_B
mov [fdd_motor_status],1
jmp fdd_motor_on
fdd_motor_on_B:
mov [fdd_motor_status],2
fdd_motor_on:
call save_timer_fdd_motor
popa
ret
;*****************************************
;* ‘Ž•€ ˆ “Š€‡€’ ‹Ÿ ‚ Œ ˆ *
;*****************************************
save_timer_fdd_motor:
mov eax,[timer_ticks]
mov [timer_fdd_motor],eax
ret
;*****************************************
;* Ž‚ Š€ ‡€„ †Šˆ ‚›Š‹ž— ˆŸ ŒŽ’Ž€ *
;*****************************************
check_fdd_motor_status:
cmp [fdd_motor_status],0
je end_check_fdd_motor_status
mov eax,[timer_ticks]
sub eax,[timer_fdd_motor]
cmp eax,500
jb end_check_fdd_motor_status
call FDDMotorOFF
mov [fdd_motor_status],0
end_check_fdd_motor_status:
ret
;**********************************
;* ‚›Š‹ž—ˆ’œ ŒŽ’Ž „ˆ‘ŠŽ‚Ž„€ *
;**********************************
FDDMotorOFF:
push AX
push DX
cmp [flp_number],1
jne FDDMotorOFF_1
call FDDMotorOFF_A
jmp FDDMotorOFF_2
FDDMotorOFF_1:
call FDDMotorOFF_B
FDDMotorOFF_2:
pop DX
pop AX
; á¡à®á ä« £®¢ ª¥è¨à®¢ ­¨ï ¢ á¢ï§¨ á ãáâ à¥¢ ­¨¥¬ ¨­ä®à¬ æ¨¨
mov [root_read],0
mov [flp_fat],0
ret
FDDMotorOFF_A:
mov DX,3F2h ;¯®àâ ã¯à ¢«¥­¨ï ¤¢¨£ â¥«ï¬¨
mov AL,0Ch ; Floppy A
out DX,AL
ret
FDDMotorOFF_B:
mov DX,3F2h ;¯®àâ ã¯à ¢«¥­¨ï ¤¢¨£ â¥«ï¬¨
mov AL,5h ; Floppy B
out DX,AL
ret
;*******************************
;*  Š€‹ˆŽ‚Š€ „ˆ‘ŠŽ‚Ž„€ "A:" *
;*******************************
RecalibrateFDD:
pusha
call save_timer_fdd_motor
; ®¤ âì ª®¬ ­¤ã "¥ª «¨¡à®¢ª "
mov AL,07h
call FDCDataOutput
mov AL,00h
call FDCDataOutput
; Ž¦¨¤ âì § ¢¥à襭¨ï ®¯¥à æ¨¨
call WaitFDCInterrupt
; cmp [FDC_Status],0
; je no_fdc_status_error
; mov [flp_status],0
;no_fdc_status_error:
call save_timer_fdd_motor
popa
ret
;*****************************************************
;* Žˆ‘Š „ŽŽ†Šˆ *
;*  à ¬¥âàë ¯¥à¥¤ îâáï ç¥à¥§ £«®¡ «ì­ë¥ ¯¥à¥¬¥­­ë¥: *
;* FDD_Track - ­®¬¥à ¤®à®¦ª¨ (0-79); *
;* FDD_Head - ­®¬¥à £®«®¢ª¨ (0-1). *
;* ¥§ã«ìâ â ®¯¥à æ¨¨ § ­®á¨âáï ¢ FDC_Status. *
;*****************************************************
SeekTrack:
pusha
call save_timer_fdd_motor
; ®¤ âì ª®¬ ­¤ã "®¨áª"
mov AL,0Fh
call FDCDataOutput
; ¥à¥¤ âì ¡ ©â ­®¬¥à  £®«®¢ª¨/­ ª®¯¨â¥«ï
mov AL,[FDD_Head]
shl AL,2
call FDCDataOutput
; ¥à¥¤ âì ¡ ©â ­®¬¥à  ¤®à®¦ª¨
mov AL,[FDD_Track]
call FDCDataOutput
; Ž¦¨¤ âì § ¢¥à襭¨ï ®¯¥à æ¨¨
call WaitFDCInterrupt
cmp [FDC_Status],FDC_Normal
jne @@Exit
; ‘®åà ­¨âì १ã«ìâ â ¯®¨áª
mov AL,08h
call FDCDataOutput
call FDCDataInput
mov [FDC_ST0],AL
call FDCDataInput
mov [FDC_C],AL
; à®¢¥à¨âì १ã«ìâ â ¯®¨áª
; ®¨áª § ¢¥à襭?
test [FDC_ST0],100000b
je @@Err
; ‡ ¤ ­­ë© â४ ­ ©¤¥­?
mov AL,[FDC_C]
cmp AL,[FDD_Track]
jne @@Err
; ®¬¥à £®«®¢ª¨ ᮢ¯ ¤ ¥â á § ¤ ­­ë¬?
mov AL,[FDC_ST0]
and AL,100b
shr AL,2
cmp AL,[FDD_Head]
jne @@Err
; Ž¯¥à æ¨ï § ¢¥à襭  ãᯥ譮
mov [FDC_Status],FDC_Normal
jmp @@Exit
@@Err: ; ’४ ­¥ ­ ©¤¥­
mov [FDC_Status],FDC_TrackNotFound
; mov [flp_status],0
@@Exit:
call save_timer_fdd_motor
popa
ret
;*******************************************************
;* —’ ˆ ‘ Š’Ž€ „€›• *
;*  à ¬¥âàë ¯¥à¥¤ îâáï ç¥à¥§ £«®¡ «ì­ë¥ ¯¥à¥¬¥­­ë¥: *
;* FDD_Track - ­®¬¥à ¤®à®¦ª¨ (0-79); *
;* FDD_Head - ­®¬¥à £®«®¢ª¨ (0-1); *
;* FDD_Sector - ­®¬¥à ᥪâ®à  (1-18). *
;* ¥§ã«ìâ â ®¯¥à æ¨¨ § ­®á¨âáï ¢ FDC_Status. *
;* ‚ á«ãç ¥ ãᯥ譮£® ¢ë¯®«­¥­¨ï ®¯¥à æ¨¨ ç⥭¨ï *
;* ᮤ¥à¦¨¬®¥ ᥪâ®à  ¡ã¤¥â § ­¥á¥­® ¢ FDD_DataBuffer. *
;*******************************************************
ReadSector:
pushad
call save_timer_fdd_motor
; “áâ ­®¢¨âì ᪮à®áâì ¯¥à¥¤ ç¨ 500 Š¡ ©â/á
mov AX,0
mov DX,03F7h
out DX,AL
; ˆ­¨æ¨ «¨§¨à®¢ âì ª ­ « ¯àאַ£® ¤®áâ㯠 ª ¯ ¬ïâ¨
mov [dmamode],0x46
call Init_FDC_DMA
; ®¤ âì ª®¬ ­¤ã "—⥭¨¥ ¤ ­­ëå"
mov AL,0E6h ;ç⥭¨¥ ¢ ¬ã«ìâ¨â४®¢®¬ ०¨¬¥
call FDCDataOutput
mov AL,[FDD_Head]
shl AL,2
call FDCDataOutput
mov AL,[FDD_Track]
call FDCDataOutput
mov AL,[FDD_Head]
call FDCDataOutput
mov AL,[FDD_Sector]
call FDCDataOutput
mov AL,2 ;ª®¤ à §¬¥à  ᥪâ®à  (512 ¡ ©â)
call FDCDataOutput
mov AL,18 ;+1; 3Fh ;ç¨á«® ᥪâ®à®¢ ­  ¤®à®¦ª¥
call FDCDataOutput
mov AL,1Bh ;§­ ç¥­¨¥ GPL
call FDCDataOutput
mov AL,0FFh ;§­ ç¥­¨¥ DTL
call FDCDataOutput
; Ž¦¨¤ ¥¬ ¯à¥à뢠­¨¥ ¯® § ¢¥à襭¨¨ ®¯¥à æ¨¨
call WaitFDCInterrupt
cmp [FDC_Status],FDC_Normal
jne @@Exit_1
; ‘ç¨â뢠¥¬ áâ âãá § ¢¥à襭¨ï ®¯¥à æ¨¨
call GetStatusInfo
test [FDC_ST0],11011000b
jnz @@Err_1
mov [FDC_Status],FDC_Normal
jmp @@Exit_1
@@Err_1: mov [FDC_Status],FDC_SectorNotFound
; mov [flp_status],0
@@Exit_1:
call save_timer_fdd_motor
popad
ret
;*******************************************************
;* —’ ˆ ‘ Š’Ž€ (‘ Ž‚’Ž ˆ Œ Ž €–ˆˆ ˆ ‘Ž ) *
;*  à ¬¥âàë ¯¥à¥¤ îâáï ç¥à¥§ £«®¡ «ì­ë¥ ¯¥à¥¬¥­­ë¥: *
;* FDD_Track - ­®¬¥à ¤®à®¦ª¨ (0-79); *
;* FDD_Head - ­®¬¥à £®«®¢ª¨ (0-1); *
;* FDD_Sector - ­®¬¥à ᥪâ®à  (1-18). *
;* ¥§ã«ìâ â ®¯¥à æ¨¨ § ­®á¨âáï ¢ FDC_Status. *
;* ‚ á«ãç ¥ ãᯥ譮£® ¢ë¯®«­¥­¨ï ®¯¥à æ¨¨ ç⥭¨ï *
;* ᮤ¥à¦¨¬®¥ ᥪâ®à  ¡ã¤¥â § ­¥á¥­® ¢ FDD_DataBuffer. *
;*******************************************************
ReadSectWithRetr:
pusha
; Ž¡­ã«¨âì áç¥â稪 ¯®¢â®à¥­¨ï ®¯¥à æ¨¨ ४ «¨¡à®¢ª¨
mov [RecalRepCounter],0
@@TryAgain:
; Ž¡­ã«¨âì áç¥â稪 ¯®¢â®à¥­¨ï ®¯¥à æ¨¨ ç⥭¨ï
mov [ReadRepCounter],0
@@ReadSector_1:
call ReadSector
cmp [FDC_Status],0
je @@Exit_2
cmp [FDC_Status],1
je @@Err_3
; ’஥ªà â­®¥ ¯®¢â®à¥­¨¥ ç⥭¨ï
inc [ReadRepCounter]
cmp [ReadRepCounter],3
jb @@ReadSector_1
; ’஥ªà â­®¥ ¯®¢â®à¥­¨¥ ४ «¨¡à®¢ª¨
call RecalibrateFDD
call SeekTrack
inc [RecalRepCounter]
cmp [RecalRepCounter],3
jb @@TryAgain
; mov [flp_status],0
@@Exit_2:
popa
ret
@@Err_3:
mov [flp_status],0
popa
ret
;*******************************************************
;* ‡€ˆ‘œ ‘ Š’Ž€ „€›• *
;*  à ¬¥âàë ¯¥à¥¤ îâáï ç¥à¥§ £«®¡ «ì­ë¥ ¯¥à¥¬¥­­ë¥: *
;* FDD_Track - ­®¬¥à ¤®à®¦ª¨ (0-79); *
;* FDD_Head - ­®¬¥à £®«®¢ª¨ (0-1); *
;* FDD_Sector - ­®¬¥à ᥪâ®à  (1-18). *
;* ¥§ã«ìâ â ®¯¥à æ¨¨ § ­®á¨âáï ¢ FDC_Status. *
;* ‚ á«ãç ¥ ãᯥ譮£® ¢ë¯®«­¥­¨ï ®¯¥à æ¨¨ § ¯¨á¨ *
;* ᮤ¥à¦¨¬®¥ FDD_DataBuffer ¡ã¤¥â § ­¥á¥­® ¢ ᥪâ®à. *
;*******************************************************
WriteSector:
pushad
call save_timer_fdd_motor
; “áâ ­®¢¨âì ᪮à®áâì ¯¥à¥¤ ç¨ 500 Š¡ ©â/á
mov AX,0
mov DX,03F7h
out DX,AL
; ˆ­¨æ¨ «¨§¨à®¢ âì ª ­ « ¯àאַ£® ¤®áâ㯠 ª ¯ ¬ïâ¨
mov [dmamode],0x4A
call Init_FDC_DMA
; ®¤ âì ª®¬ ­¤ã "‡ ¯¨áì ¤ ­­ëå"
mov AL,0xC5 ;0x45 ;§ ¯¨áì ¢ ¬ã«ìâ¨â४®¢®¬ ०¨¬¥
call FDCDataOutput
mov AL,[FDD_Head]
shl AL,2
call FDCDataOutput
mov AL,[FDD_Track]
call FDCDataOutput
mov AL,[FDD_Head]
call FDCDataOutput
mov AL,[FDD_Sector]
call FDCDataOutput
mov AL,2 ;ª®¤ à §¬¥à  ᥪâ®à  (512 ¡ ©â)
call FDCDataOutput
mov AL,18; 3Fh ;ç¨á«® ᥪâ®à®¢ ­  ¤®à®¦ª¥
call FDCDataOutput
mov AL,1Bh ;§­ ç¥­¨¥ GPL
call FDCDataOutput
mov AL,0FFh ;§­ ç¥­¨¥ DTL
call FDCDataOutput
; Ž¦¨¤ ¥¬ ¯à¥à뢠­¨¥ ¯® § ¢¥à襭¨¨ ®¯¥à æ¨¨
call WaitFDCInterrupt
cmp [FDC_Status],FDC_Normal
jne @@Exit_3
; ‘ç¨â뢠¥¬ áâ âãá § ¢¥à襭¨ï ®¯¥à æ¨¨
call GetStatusInfo
test [FDC_ST0],11000000b ;11011000b
jnz @@Err_2
mov [FDC_Status],FDC_Normal
jmp @@Exit_3
@@Err_2: mov [FDC_Status],FDC_SectorNotFound
@@Exit_3:
call save_timer_fdd_motor
popad
ret
;*******************************************************
;* ‡€ˆ‘œ ‘ Š’Ž€ (‘ Ž‚’Ž ˆ Œ Ž €–ˆˆ ˆ ‘Ž ) *
;*  à ¬¥âàë ¯¥à¥¤ îâáï ç¥à¥§ £«®¡ «ì­ë¥ ¯¥à¥¬¥­­ë¥: *
;* FDD_Track - ­®¬¥à ¤®à®¦ª¨ (0-79); *
;* FDD_Head - ­®¬¥à £®«®¢ª¨ (0-1); *
;* FDD_Sector - ­®¬¥à ᥪâ®à  (1-18). *
;* ¥§ã«ìâ â ®¯¥à æ¨¨ § ­®á¨âáï ¢ FDC_Status. *
;* ‚ á«ãç ¥ ãᯥ譮£® ¢ë¯®«­¥­¨ï ®¯¥à æ¨¨ § ¯¨á¨ *
;* ᮤ¥à¦¨¬®¥ FDD_DataBuffer ¡ã¤¥â § ­¥á¥­® ¢ ᥪâ®à. *
;*******************************************************
WriteSectWithRetr:
pusha
; Ž¡­ã«¨âì áç¥â稪 ¯®¢â®à¥­¨ï ®¯¥à æ¨¨ ४ «¨¡à®¢ª¨
mov [RecalRepCounter],0
@@TryAgain_1:
; Ž¡­ã«¨âì áç¥â稪 ¯®¢â®à¥­¨ï ®¯¥à æ¨¨ ç⥭¨ï
mov [ReadRepCounter],0
@@WriteSector_1:
call WriteSector
cmp [FDC_Status],0
je @@Exit_4
cmp [FDC_Status],1
je @@Err_4
; ’஥ªà â­®¥ ¯®¢â®à¥­¨¥ ç⥭¨ï
inc [ReadRepCounter]
cmp [ReadRepCounter],3
jb @@WriteSector_1
; ’஥ªà â­®¥ ¯®¢â®à¥­¨¥ ४ «¨¡à®¢ª¨
call RecalibrateFDD
call SeekTrack
inc [RecalRepCounter]
cmp [RecalRepCounter],3
jb @@TryAgain_1
@@Exit_4:
popa
ret
@@Err_4:
mov [flp_status],0
popa
ret
;*********************************************
;* Ž‹“—ˆ’œ ˆ”ŽŒ€–ˆž Ž  ‡“‹œ’€’ Ž €–ˆˆ *
;*********************************************
GetStatusInfo:
push AX
call FDCDataInput
mov [FDC_ST0],AL
call FDCDataInput
mov [FDC_ST1],AL
call FDCDataInput
mov [FDC_ST2],AL
call FDCDataInput
mov [FDC_C],AL
call FDCDataInput
mov [FDC_H],AL
call FDCDataInput
mov [FDC_R],AL
call FDCDataInput
mov [FDC_N],AL
pop AX
ret