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/trunk/detect/commouse.inc
0,0 → 1,121
;**************************************************
;* ÏÎÈÑÊ ÌÛØÈ ÏÎ ÏÎÑËÅÄÎÂÀÒÅËÜÍÛÌ ÏÎÐÒÀÌ *
;* Ïðîöåäóðà ïîäãîòàâëèâàåò ãëîáàëüíûå ïåðåìåííûå *
;* COMPortNum è COMPortBaseAddr äëÿ ïîäïðîãðàììû *
;* óñòàíîâêè îáðàáîò÷èêà ïðåðûâàíèÿ *
;**************************************************
; Àâòîð èñõîäíîãî òåêñòà Êóëàêîâ Âëàäèìèð Ãåííàäüåâè÷.
; Àäàïòàöèÿ è äîðàáîòêà Mario79
 
MSMouseSearch:
pusha
; Çàïðåòèòü ïðåðûâàíèå COM1 è COM2
cli
in AL,21h ;ïðî÷èòàòü ìàñêó ïðåðûâàíèé
or AL,18h ;çàïðåòèòü IRQ3 è IRQ4
out 21h,AL ;çàìåíèòü ìàñêó
sti
; ÏÎÈÑÊ ÌÛØÈ ×ÅÐÅÇ COM-ÏÎÐÒÛ
MouseSearch:
; Óñòàíàâëèâàåì ñêîðîñòü
; ïðèåìà/ïåðåäà÷è 1200 áîä
mov DX,[COMPortBaseAddr]
add DX,3
in AL,DX
or AL,80h ;óñòàíîâèòü áèò DLAB
out DX,AL
mov DX,[COMPortBaseAddr]
mov AL,60h ;1200 áîä
out DX,AL
inc DX
mov AL,0
out DX,AL
; Óñòàíîâèòü äëèíó ñëîâà 7 áèò, 1 ñòîïîâûé áèò,
; ÷åòíîñòü íå êîíòðîëèðîâàòü
mov DX,[COMPortBaseAddr]
add DX,3
mov AL,00000010b
out DX,AL
; Çàïðåòèòü âñå ïðåðûâàíèÿ
mov DX,[COMPortBaseAddr]
inc DX
mov AL,0
out DX,AL
; Ïðîâåðèòü, ÷òî óñòðîéñòâî ïîäêëþ÷åíî è ÿâëÿåòñÿ
; ìûøüþ òèïà MSMouse
; Îòêëþ÷èòü ïèòàíèå ìûøè è ïðåðûâàíèÿ
mov DX,[COMPortBaseAddr]
add DX,4 ;ðåãèñòð óïðàâëåíèÿ ìîäåìîì
mov AL,0 ;ñáðîñèòü DTR, RTS è OUT2
out DX,AL
; Îæèäàòü 5 "òèêîâ" (0,2 ñ)
mov ecx,0xffff
dT_1:
dec ecx
cmp ecx,0
jne dT_1
mov ecx,0xffff
; Âêëþ÷èòü ïèòàíèå ìûøè
mov AL,11b ;óñòàíîâèòü DTR è RTS
out DX,AL
; Î÷èñòèòü ðåãèñòð äàííûõ
mov DX,[COMPortBaseAddr]
in AL,DX
; Öèêë îïðîñà ïîðòà
WaitData:
; Îæèäàòü åùå 10 "òèêîâ"
dec ecx
cmp ecx,0
je NoMouse
; Ïðîâåðèòü íàëè÷èå èäåíòèôèêàöèîííîãî áàéòà
mov DX,[COMPortBaseAddr]
add DX,5
in AL,DX
test AL,1 ;Äàííûå ãîòîâû?
jz WaitData
; Ââåñòè äàííûå
mov DX,[COMPortBaseAddr]
in AL,DX
; Óñòðîéñòâî ÿâëÿåòñÿ ìûøüþ?
cmp AL,'M'
je EndDetect
NoMouse:
inc [COMPortNum]
cmp [COMPortNum],1
ja EndDetect
sub [COMPortBaseAddr],100h
jmp MouseSearch
 
iglobal
COMPortBaseAddr dw 3F8h
COMPortNum dw 0
endg
 
iglobal
boot_setmouse_type db 'No COM mouse, set PS2',0
db 'Detected - COM1 mouse',0
db 'Detected - COM2 mouse',0
endg
 
EndDetect:
cmp [COMPortNum],0 ;íîìåð ïîðòà ìåíüøå 0?
jl ComMouseNotFound ;ìûøü íå íàéäåíà
cmp [COMPortNum],1 ;íîìåð ïîðòà áîëüøå 1?
ja ComMouseNotFound ;ìûøü íå íàéäåíà
mov ax,[COMPortNum]
add al,2
jmp set_detecting_mouse
ComMouseNotFound:
mov al,1
set_detecting_mouse:
mov [0xF604],al
dec al
movzx eax,al
imul eax,22
mov esi,boot_setmouse_type
add esi,eax
call boot_log
popa
 
 
/trunk/detect/dev_fd.inc
0,0 → 1,20
;***************************************************
; ïðåäâàðèòåëüíàÿ î÷èñòêà îáëàñòè òàáëèöû
; ïîèñê è çàíåñåíèå â òàáëèöó ïðèâîäîâ FDD
; àâòîð Mario79
;***************************************************
xor eax,eax
mov edi,0x40000
mov ecx,16384
cld
rep stosd
 
mov al,0x10
out 0x70,al
mov cx,0xff
wait_cmos:
dec cx
cmp cx,0
jne wait_cmos
in al,0x71
mov [0x40000],al
/trunk/detect/dev_hdcd.inc
0,0 → 1,374
;******************************************************
; ïîèñê ïðèâîäîâ HDD è CD
; àâòîð èñõîäíîãî òåêñòà Êóëàêîâ Âëàäèìèð Ãåííàäüåâè÷.
; àäàïòàöèÿ è äîðàáîòêà Mario79
;******************************************************
 
;****************************************************
;* ÏÎÈÑÊ HDD è CD *
;****************************************************
FindHDD:
mov [ChannelNumber],1
mov [DiskNumber],0
call FindHDD_3
; mov ax,[Sector512+176]
; mov [0x40006],ax
; mov ax,[Sector512+126]
; mov [0x40008],ax
; mov ax,[Sector512+128]
; mov [0x40008],ax
mov [DiskNumber],1
call FindHDD_3
; mov al,[Sector512+176]
; mov [0x40007],al
inc [ChannelNumber]
mov [DiskNumber],0
call FindHDD_3
; mov al,[Sector512+176]
; mov [0x40008],al
mov [DiskNumber],1
call FindHDD_1
; mov al,[Sector512+176]
; mov [0x40009],al
jmp EndFindHDD
 
FindHDD_1:
call ReadHDD_ID
cmp [DevErrorCode],0
jne FindHDD_2
cmp [Sector512+6],word 16
ja FindHDD_2
cmp [Sector512+12],word 255
ja FindHDD_2
inc byte [0x40001]
jmp FindHDD_2_2
FindHDD_2:
call DeviceReset
cmp [DevErrorCode],0
jne FindHDD_2_2
call ReadCD_ID
cmp [DevErrorCode],0
jne FindHDD_2_2
inc byte [0x40001]
inc byte [0x40001]
FindHDD_2_2:
ret
 
FindHDD_3:
call FindHDD_1
shl byte [0x40001],2
ret
 
 
; Àäðåñ ñ÷èòûâàåìîãî ñåêòîðà â ðåæèìå LBA
SectorAddress DD ?
 
;*************************************************
;* ×ÒÅÍÈÅ ÈÄÅÍÒÈÔÈÊÀÒÎÐÀ ÆÅÑÒÊÎÃÎ ÄÈÑÊÀ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðåìåííûå: *
;* ChannelNumber - íîìåð êàíàëà (1 èëè 2); *
;* DiskNumber - íîìåð äèñêà íà êàíàëå (0 èëè 1). *
;* Èäåíòèôèêàöèîííûé áëîê äàííûõ ñ÷èòûâàåòñÿ *
;* â ìàññèâ Sector512. *
;*************************************************
ReadHDD_ID:
; Çàäàòü ðåæèì CHS
mov [ATAAddressMode],0
; Ïîñëàòü êîìàíäó èäåíòèôèêàöèè óñòðîéñòâà
mov [ATAFeatures],0
mov [ATAHead],0
mov [ATACommand],0ECh
call SendCommandToHDD
cmp [DevErrorCode],0 ;ïðîâåðèòü êîä îøèáêè
jne @@End ;çàêîí÷èòü, ñîõðàíèâ êîä îøèáêè
mov DX,[ATABasePortAddr]
add DX,7 ;àäðåñ ðåãèñòðà ñîñòîÿíèÿ
mov ecx,0xffff
@@WaitCompleet:
; Ïðîâåðèòü âðåìÿ âûïîëíåíèÿ êîìàíäû
dec ecx
cmp ecx,0
je @@Error1 ;îøèáêà òàéì-àóòà
; Ïðîâåðèòü ãîòîâíîñòü
in AL,DX
test AL,80h ;ñîñòîÿíèå ñèãíàëà BSY
jnz @@WaitCompleet
test AL,1 ;ñîñòîÿíèå ñèãíàëà ERR
jnz @@Error6
test AL,08h ;ñîñòîÿíèå ñèãíàëà DRQ
jz @@WaitCompleet
; Ïðèíÿòü áëîê äàííûõ îò êîíòðîëëåðà
; mov AX,DS
; mov ES,AX
mov EDI,Sector512 ;offset Sector512
mov DX,[ATABasePortAddr] ;ðåãèñòð äàííûõ
mov CX,256 ;÷èñëî ñ÷èòûâàåìûõ ñëîâ
rep insw ;ïðèíÿòü áëîê äàííûõ
jmp @@End
; Çàïèñàòü êîä îøèáêè
@@Error1:
mov [DevErrorCode],1
jmp @@End
@@Error6:
mov [DevErrorCode],6
@@End: ret
 
 
 
; Ñòàíäàðòíûå áàçîâûå àäðåñà êàíàëîâ 1 è 2
StandardATABases DW 1F0h, 170h
; Íîìåð êàíàëà
ChannelNumber DW ?
; Íîìåð äèñêà
DiskNumber DB ?
; Áàçîâûé àäðåñ ãðóïïû ïîðòîâ êîíòðîëëåðà ATA
ATABasePortAddr DW ?
; Ïàðàìåòðû ATA-êîìàíäû
ATAFeatures DB ? ;îñîáåííîñòè
ATASectorCount DB ? ;êîëè÷åñòâî îáðàáàòûâàåìûõ ñåêòîðîâ
ATASectorNumber DB ? ;íîìåð íà÷àëüíîãî ñåêòîðà
ATACylinder DW ? ;íîìåð íà÷àëüíîãî öèëèíäðà
ATAHead DB ? ;íîìåð íà÷àëüíîé ãîëîâêè
ATAAddressMode DB ? ;ðåæèì àäðåñàöèè (0 - CHS, 1 - LBA)
ATACommand DB ? ;êîä êîìàíäû, ïîäëåæàùåé âûïîëíåíèþ
; Êîä îøèáêè (0 - íåò îøèáîê, 1 - ïðåâûøåí äîïóñòèìûé
; èíòåðâàë îæèäàíèÿ, 2 - íåâåðíûé êîä ðåæèìà àäðåñàöèè,
; 3 - íåâåðíûé íîìåð êàíàëà, 4 - íåâåðíûé íîìåð äèñêà,
; 5 - íåâåðíûé íîìåð ãîëîâêè, 6 - îøèáêà ïðè âûïîëíåíèè
; êîìàíäû)
DevErrorCode DB ?
 
;****************************************************
;* ÏÎÑËÀÒÜ ÊÎÌÀÍÄÓ ÇÀÄÀÍÍÎÌÓ ÄÈÑÊÓ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðåìåííûå: *
;* ChannelNumber - íîìåð êàíàëà (1 èëè 2); *
;* DiskNumber - íîìåð äèñêà (0 èëè 1); *
;* ATAFeatures - "îñîáåííîñòè"; *
;* ATASectorCount - êîëè÷åñòâî ñåêòîðîâ; *
;* ATASectorNumber - íîìåð íà÷àëüíîãî ñåêòîðà; *
;* ATACylinder - íîìåð íà÷àëüíîãî öèëèíäðà; *
;* ATAHead - íîìåð íà÷àëüíîé ãîëîâêè; *
;* ATAAddressMode - ðåæèì àäðåñàöèè (0-CHS, 1-LBA); *
;* ATACommand - êîä êîìàíäû. *
;* Ïîñëå óñïåøíîãî âûïîëíåíèÿ ôóíêöèè: *
;* â ATABasePortAddr - áàçîâûé àäðåñ HDD; *
;* â DevErrorCode - íîëü. *
;* Ïðè âîçíèêíîâåíèè îøèáêè â DevErrorCode áóäåò *
;* âîçâðàùåí êîä îøèáêè. *
;****************************************************
SendCommandToHDD:
; Ïðîâåðèòü çíà÷åíèå êîäà ðåæèìà
cmp [ATAAddressMode],1
ja @@Err2
; Ïðîâåðèòü êîððåêòíîñòü íîìåðà êàíàëà
mov BX,[ChannelNumber]
cmp BX,1
jb @@Err3
cmp BX,2
ja @@Err3
; Óñòàíîâèòü áàçîâûé àäðåñ
dec BX
shl BX,1
movzx ebx,bx
mov AX,[ebx+StandardATABases]
mov [ATABasePortAddr],AX
; Îæèäàíèå ãîòîâíîñòè HDD ê ïðèåìó êîìàíäû
; Âûáðàòü íóæíûé äèñê
mov DX,[ATABasePortAddr]
add DX,6 ;àäðåñ ðåãèñòðà ãîëîâîê
mov AL,[DiskNumber]
cmp AL,1 ;ïðîâåðèòü íîìåðà äèñêà
ja @@Err4
shl AL,4
or AL,10100000b
out DX,AL
; Îæèäàòü, ïîêà äèñê íå áóäåò ãîòîâ
inc DX
mov ecx,0xfff
; mov eax,[timer_ticks]
; mov [TickCounter_1],eax
@@WaitHDReady:
; Ïðîâåðèòü âðåìÿ îæèäàíèÿ
dec ecx
cmp ecx,0
je @@Err1
; mov eax,[timer_ticks]
; sub eax,[TickCounter_1]
; cmp eax,300 ;îæèäàòü 300 òèêîâ
; ja @@Err1 ;îøèáêà òàéì-àóòà
; Ïðî÷èòàòü ðåãèñòð ñîñòîÿíèÿ
in AL,DX
; Ïðîâåðèòü ñîñòîÿíèå ñèãíàëà BSY
test AL,80h
jnz @@WaitHDReady
; Ïðîâåðèòü ñîñòîÿíèå ñèãíàëà DRQ
test AL,08h
jnz @@WaitHDReady
; Çàãðóçèòü êîìàíäó â ðåãèñòðû êîíòðîëëåðà
cli
mov DX,[ATABasePortAddr]
inc DX ;ðåãèñòð "îñîáåííîñòåé"
mov AL,[ATAFeatures]
out DX,AL
inc DX ;ñ÷åò÷èê ñåêòîðîâ
mov AL,[ATASectorCount]
out DX,AL
inc DX ;ðåãèñòð íîìåðà ñåêòîðà
mov AL,[ATASectorNumber]
out DX,AL
inc DX ;íîìåð öèëèíäðà (ìëàäøèé áàéò)
mov AX,[ATACylinder]
out DX,AL
inc DX ;íîìåð öèëèíäðà (ñòàðøèé áàéò)
mov AL,AH
out DX,AL
inc DX ;íîìåð ãîëîâêè/íîìåð äèñêà
mov AL,[DiskNumber]
shl AL,4
cmp [ATAHead],0Fh ;ïðîâåðèòü íîìåð ãîëîâêè
ja @@Err5
or AL,[ATAHead]
or AL,10100000b
mov AH,[ATAAddressMode]
shl AH,6
or AL,AH
out DX,AL
; Ïîñëàòü êîìàíäó
mov AL,[ATACommand]
inc DX ;ðåãèñòð êîìàíä
out DX,AL
sti
; Ñáðîñèòü ïðèçíàê îøèáêè
mov [DevErrorCode],0
jmp @@End_2
; Çàïèñàòü êîä îøèáêè
@@Err1: mov [DevErrorCode],1
jmp @@End_2
@@Err2: mov [DevErrorCode],2
jmp @@End_2
@@Err3: mov [DevErrorCode],3
jmp @@End_2
@@Err4: mov [DevErrorCode],4
jmp @@End_2
@@Err5: mov [DevErrorCode],5
; Çàâåðøåíèå ðàáîòû ïðîãðàììû
@@End_2:
ret
 
;*************************************************
;* ×ÒÅÍÈÅ ÈÄÅÍÒÈÔÈÊÀÒÎÐÀ ÓÑÒÐÎÉÑÒÂÀ ATAPI *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðìåííûå: *
;* ChannelNumber - íîìåð êàíàëà; *
;* DiskNumber - íîìåð äèñêà íà êàíàëå. *
;* Èäåíòèôèêàöèîííûé áëîê äàííûõ ñ÷èòûâàåòñÿ *
;* â ìàññèâ Sector512. *
;*************************************************
ReadCD_ID:
; Çàäàòü ðåæèì CHS
mov [ATAAddressMode],0
; Ïîñëàòü êîìàíäó èäåíòèôèêàöèè óñòðîéñòâà
mov [ATAFeatures],0
mov [ATASectorCount],0
mov [ATASectorNumber],0
mov [ATACylinder],0
mov [ATAHead],0
mov [ATACommand],0A1h
call SendCommandToHDD
cmp [DevErrorCode],0 ;ïðîâåðèòü êîä îøèáêè
jne @@End_1 ;çàêîí÷èòü, ñîõðàíèâ êîä îøèáêè
; Îæèäàòü ãîòîâíîñòü äàííûõ HDD
mov DX,[ATABasePortAddr]
add DX,7 ;ïîðò 1õ7h
mov ecx,0xffff
@@WaitCompleet_1:
; Ïðîâåðèòü âðåìÿ
dec ecx
cmp ecx,0
je @@Error1_1 ;îøèáêà òàéì-àóòà
; Ïðîâåðèòü ãîòîâíîñòü
in AL,DX
test AL,80h ;ñîñòîÿíèå ñèãíàëà BSY
jnz @@WaitCompleet_1
test AL,1 ;ñîñòîÿíèå ñèãíàëà ERR
jnz @@Error6_1
test AL,08h ;ñîñòîÿíèå ñèãíàëà DRQ
jz @@WaitCompleet_1
; Ïðèíÿòü áëîê äàííûõ îò êîíòðîëëåðà
; mov AX,DS
; mov ES,AX
mov EDI,Sector512 ;offset Sector512
mov DX,[ATABasePortAddr] ;ïîðò 1x0h
mov CX,256 ;÷èñëî ñ÷èòûâàåìûõ ñëîâ
rep insw
jmp @@End_1
; Çàïèñàòü êîä îøèáêè
@@Error1_1:
mov [DevErrorCode],1
jmp @@End_1
@@Error6_1:
mov [DevErrorCode],6
@@End_1:
ret
 
;*************************************************
;* ÑÁÐÎÑ ÓÑÒÐÎÉÑÒÂÀ *
;* Âõîäíûå ïàðàìåòðû ïåðåäàþòñÿ ÷åðåç ãëîáàëüíûå *
;* ïåðåìåííûå: *
;* ChannelNumber - íîìåð êàíàëà (1 èëè 2); *
;* DiskNumber - íîìåð äèñêà (0 èëè 1). *
;*************************************************
DeviceReset:
; Ïðîâåðèòü êîððåêòíîñòü íîìåðà êàíàëà
mov BX,[ChannelNumber]
cmp BX,1
jb @@Err3_2
cmp BX,2
ja @@Err3_2
; Óñòàíîâèòü áàçîâûé àäðåñ
dec BX
shl BX,1
movzx ebx,bx
mov DX,[ebx+StandardATABases]
mov [ATABasePortAddr],DX
; Âûáðàòü íóæíûé äèñê
add DX,6 ;àäðåñ ðåãèñòðà ãîëîâîê
mov AL,[DiskNumber]
cmp AL,1 ;ïðîâåðèòü íîìåðà äèñêà
ja @@Err4_2
shl AL,4
or AL,10100000b
out DX,AL
; Ïîñëàòü êîìàíäó "Ñáðîñ"
mov AL,08h
inc DX ;ðåãèñòð êîìàíä
out DX,AL
mov ecx,0xffff
@@WaitHDReady_1:
; Ïðîâåðèòü âðåìÿ îæèäàíèÿ
dec ecx
cmp ecx,0
je @@Err1_2 ;îøèáêà òàéì-àóòà
; Ïðî÷èòàòü ðåãèñòð ñîñòîÿíèÿ
in AL,DX
; Ïðîâåðèòü ñîñòîÿíèå ñèãíàëà BSY
test AL,80h
jnz @@WaitHDReady_1
; Ñáðîñèòü ïðèçíàê îøèáêè
mov [DevErrorCode],0
jmp @@End_3
; Îáðàáîòêà îøèáîê
@@Err1_2: mov [DevErrorCode],1
jmp @@End_3
@@Err3_2: mov [DevErrorCode],3
jmp @@End_3
@@Err4_2: mov [DevErrorCode],4
; Çàïèñàòü êîä îøèáêè
@@End_3:
ret
 
EndFindHDD:
 
/trunk/detect/disks.inc
0,0 → 1,4
include 'dev_fd.inc'
include 'dev_hdcd.inc'
include 'sear_par.inc'
 
/trunk/detect/sear_par.inc
0,0 → 1,116
;****************************************************
; ïîèñê ëîãè÷åñêèõ äèñêîâ íà îáíàðóæåííûõ HDD
; è çàíåñåíèå äàííûõ â îáëàñòü òàáëèöû
; àâòîð Mario79
;****************************************************
mov [transfer_adress],0x4000a
search_partitions_ide0:
test [0x40001],byte 0x40
jz search_partitions_ide1
mov [hdbase],0x1f0
mov [hdid],0x0
mov [hdpos],1
mov [fat32part],1
search_partitions_ide0_1:
call set_FAT32_variables
cmp [problem_partition],0
jne search_partitions_ide1
inc byte [0x40002]
call partition_data_transfer
add [transfer_adress],100
inc [fat32part]
jmp search_partitions_ide0_1
 
search_partitions_ide1:
test [0x40001],byte 0x10
jz search_partitions_ide2
mov [hdbase],0x1f0
mov [hdid],0x10
mov [hdpos],2
mov [fat32part],1
search_partitions_ide1_1:
call set_FAT32_variables
cmp [problem_partition],0
jne search_partitions_ide2
inc byte [0x40003]
call partition_data_transfer
add [transfer_adress],100
inc [fat32part]
jmp search_partitions_ide1_1
 
search_partitions_ide2:
test [0x40001],byte 0x4
jz search_partitions_ide3
mov [hdbase],0x170
mov [hdid],0x0
mov [hdpos],3
mov [fat32part],1
search_partitions_ide2_1:
call set_FAT32_variables
cmp [problem_partition],0
jne search_partitions_ide3
inc byte [0x40004]
call partition_data_transfer
add [transfer_adress],100
inc [fat32part]
jmp search_partitions_ide2_1
 
search_partitions_ide3:
test [0x40001],byte 0x1
jz end_search_partitions_ide
mov [hdbase],0x170
mov [hdid],0x10
mov [hdpos],4
mov [fat32part],1
search_partitions_ide3_1:
call set_FAT32_variables
cmp [problem_partition],0
jne end_search_partitions_ide
inc byte [0x40005]
call partition_data_transfer
add [transfer_adress],100
inc [fat32part]
jmp search_partitions_ide3_1
 
partition_data_transfer:
mov edi,[transfer_adress]
mov esi,PARTITION_START
xor ecx,ecx
mov cx,69 ;100
rep movsb
ret
transfer_adress dd 0
partition_data_transfer_1:
cli
mov edi,PARTITION_START
mov esi,[transfer_adress]
xor ecx,ecx
mov cx,69 ;100
rep movsb
sti
ret
 
end_search_partitions_ide:
 
;PARTITION_START dd 0x3f
;PARTITION_END dd 0
;SECTORS_PER_FAT dd 0x1f3a
;NUMBER_OF_FATS dd 0x2
;SECTORS_PER_CLUSTER dd 0x8
;BYTES_PER_SECTOR dd 0x200 ; Note: if BPS <> 512 need lots of changes
;ROOT_CLUSTER dd 2 ; first rootdir cluster
;FAT_START dd 0 ; start of fat table
;ROOT_START dd 0 ; start of rootdir (only fat16)
;ROOT_SECTORS dd 0 ; count of rootdir sectors (only fat16)
;DATA_START dd 0 ; start of data area (=first cluster 2)
;LAST_CLUSTER dd 0 ; last availabe cluster
;ADR_FSINFO dd 0 ; used only by fat32
;
;fatRESERVED dd 0x0FFFFFF6
;fatBAD dd 0x0FFFFFF7
;fatEND dd 0x0FFFFFF8
;fatMASK dd 0x0FFFFFFF
;
;fat_type db 0 ; 0=none, 16=fat16, 32=fat32