mirror of
https://github.com/Tolik-Trek/FORMAT.git
synced 2026-06-17 10:20:28 +03:00
656 lines
16 KiB
NASM
656 lines
16 KiB
NASM
;!TODO:
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; [ ] Dss.DRV.Open
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; [ ] Dss.DRV.Close
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; [ ] .SectorsPerFAT32 DWORD 0 error ¥á«¨ áâ à訩 ¡ ©â !=0
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; [ ] .FAT.LABEL DB 'NO_LABEL ' ¤®¯®«¨â¥«ì® ¯¨á âì ¢ ª®à¥¢ãî ¤¨à¥ªâ®à¨î
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/*
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BOOT_SECTOR EQU #00
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.JMP EQU #00 ; BLOCK 3,0 BS_jmpBoot Jump to bootstrap (E.g. eb 3c 90; on i86: JMP 003E NOP. One finds either eb xx 90, or e9 xx xx.
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.ID_NAME EQU #03 ; TEXT 8 BS_OEMName DOS NAME - DB "DSS_1.70"
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; Block Parameters BIOS
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.BytesPerSector GenIOCTL.GetParams EQU #0B ; WORD #200 BPB_BytsPerSec <09> §¬¥à ᥪâ®à ¢ ¡ ©â å
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.SectorsPerCluster ;!TODO EQU #0D ; BYTE 2 BPB_SecPerClus <09> §¬¥à ª« áâ¥à ¢ ᥪâ®à å
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.RESERVED_SECTORS !RESERVED_SECTORS EQU #0E ; WORD 1 BPB_ResvdSecCnt <09> §¬¥à á¨á⥬®© ®¡« á⨠(¢ª«îç ï íâ®â ᥪâ®à) RESERVE SECTORS
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.Number_of_FATs 2 EQU #10 ; BYTE 2 BPB_NumFATs Š®«¨ç¥á⢮ â ¡«¨æ FAT
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.FilesInRootDIR 0 EQU #11 ; WORD 112 BPB_RootEntCnt —¨á«® ®¯¨á ⥫¥© ä ©«®¢ ¢ ª®à¥¢®¬ ª â «®£¥ (¢ FAT32 - 0)
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.SectorsPerDrive 0 EQU #13 ; WORD 1440 BPB_TotSec16 Ž¡é¥¥ ç¨á«® ᥪâ®à®¢ ¤¨áª¥ (¥á«¨ 0, â® à §¬¥à - ¢ .BPB_BIG_TOTAL_SECTORS)
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.DRIVE_TYPE !DRV_TYPE EQU #15 ; BYTE #F0 BPB_Media ’¨¯ ãáâனáâ¢
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.SectorsPerFAT16 0 EQU #16 ; WORD 2 BPB_FATSz16 <09> §¬¥à ®¤®© FAT ¢ ᥪâ®à å (0 ¢ FAT32)
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.SectorsPerTrack GenIOCTL.GetParams EQU #18 ; WORD 9 BPB_SecPerTrk <09> §¬¥à ¤®à®¦ª¨ ¢ ᥪâ®à å
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.HEADS GenIOCTL.GetParams EQU #1A ; WORD 2 BPB_NumHeads ª®«¨ç¥á⢮ £®«®¢®ª
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.HIDDEN EQU #1C ; DWORD 0 BPB_HiddSec ª®«¨ç¥á⢮ áªàëâëå ᥪâ®à®¢
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.BPB_BIG_TOTAL_SECTORS_L EQU #20 ; WORD 0 BPB_TotSec32 BIG TOTAL SECTOR Low word
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.BPB_BIG_TOTAL_SECTORS_H EQU #22 ; WORD 0 BPB_TotSec32 BIG TOTAL SECTOR High word
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; FAT 32
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.SectorsPerFAT32 EQU #24 ; DWORD 4 BPB_FATSz32 <09> §¬¥à ®¤®© FAT ¢ ᥪâ®à å
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.MainFATnumber 0 EQU #28 ; WORD 0 BPB_ExtFlags <09>®¬¥à £« ¢®© â ¡«¨æë FAT
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.Version 0 EQU #2A ; WORD 0 BPB_FSVer ‚¥àá¨ï FAT32 (®¡ëç® 0)
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.RootDirStartCluster 2 EQU #2C ; DWORD 2 BPB_RootClus <09>¥à¢ë© ª« áâ¥à ª®à¥¢®£® ª â «®£ (®¡ëç® 2)
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.FSINFO_Sector 1 EQU #30 ; WORD 1 BPB_FSInfo <09>®¬¥à ᥪâ®à áâàãªâãàë FSINFO (®¡ëç® 1)
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.CopyBootSector 6 EQU #32 ; WORD 6 BPB_BkBootSec <09>®¬¥à ᥪâ®à - ª®¯¨¨ § £à㧮箣® (®¡ëç® 6)
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.reserved_block: 0 EQU #34 ; BLOCK 12 BPB_Reserved ‡ १¥à¢¨à®¢ ®
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.FDD_Number GenIOCTL.GetParams&#F0 EQU #40 ; BYTE 0 BS_DrvNum <09>®¬¥à ¤¨áª®¢®¤ ¤«ï äãªæ¨© BIOS
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.reserved_2: 0 EQU #41 ; BYTE 0 BS_Reserved1 ‡ १¥à¢¨à®¢ ®
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.FAT32.EXT_BOOT_REC_SIGNATURE EQU #42 ; BYTE #29 BS_BootSig ‘¨£ âãà - #29
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.FAT32.SERIAL_NUMBER EQU #43 ; DWORD 0 BS_VolID VOLUME SERIAL NUMBER
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.FAT32.LABEL EQU #47 ; TEXT 11 BS_VolLab Œ¥âª ¤¨áª
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.ID_FAT32 EQU #52 ; TEXT 8 BS_FilSysType €¡¡à¥¢¨ âãà ä ©«®¢®© á¨á⥬ë
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.BOOT_CODE_FAT32 EQU #5A
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------------------------------------------------------------------------
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!DRV_TYPE: GenIOCTL.GetParams - 䨧¨ç¥áª¨© ®¬¥à
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0,1 - BIOS.DRV_GET_PAR - ⨯ ä«®¯ àï
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#8x - Hard Drive
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®á⠫쮥 ¯®¤ã¬ âì
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;;;;;;;;;;;;;;;;;
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¤«ï ᬥ饨ï FAT ¤® ªà ⮣® 4096 § 票ï:
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1) tmp1 = ((.HIDDEN + min_last_sector) & #0F)>0 ) * #10
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2) tmp2 = (.HIDDEN + min_last_sector) & #FFFF'FFF0
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3) tmp3 = tmp2 + tmp1
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4) error = (tmp3 >= #1000'0000) ; LBA28
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reserved_sectors = ( ((.HIDDEN + min_last_sector) & #0F)>0 ) * #10) - .HIDDEN
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;;;;;;;;;;;;;;;;;
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*/
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; DSS Drive Formatter
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FAT32_FORMAT:
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////////////////////////////////////////////////////////////////////////
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MAKE_AUTO: LD (STOP_ERROR.Save_SP),SP
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;!FIXIT
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LD A,(FMTDISK)
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LD (VARIABLES.CurrentDrive),A
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;
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CALL CALCULATE_FAT
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CALL FORMAT_DRIVE
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;!FIXIT
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;CALL MAKE_ROOT_DIR_LABEL ; ¯¥à¢ ï § ¯¨áì ¢ root dir - ¬¥âª , ¯®â®¬ 㫨
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RET
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;-----------------------------------------------------------------------
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; Ž¯à¥¤¥«¥¨¥ ¯ à ¬¥â஢ ®á¨â¥«ï ¨ ¢ë¡®à FAT
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CALCULATE_FAT: CALL .STEP1 ; íâ ¤®«¦ ¡ëâì ®¡é¥© ¤«ï § ¯®«¥¨ï £¥®¬¥âਨ ¤¨áª
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; €¢â®¬ â¨ç¥áª¨© ¢ë¡®à FAT_TYPE, RESERVED_SECTORS, SectorsPerCluster
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CALL .STEP2
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; ¤ «ìè¥ ãáâ ¢«¨¢ ¥¬ £¥®¬¥âà¨î. “¦¥ ¤®«¦¥ ¡ëâì ¢ë¡à ⨯ FAT
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CALL .STEP3
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RET
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;--------------;
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;--------------;
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.STEP1: LD A,(VARIABLES.CurrentDrive)
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LD BC,Dss.DRV.GenIOCTL.GetMoreParams
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RST ToDSS.DRV
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JR NC,.set_hidden
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;
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CP BIOS.Error.InvalidSubFunction
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JP NZ,STOP_ERROR
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; ¥á«¨ ¥â â ª®© ¯®¤äãªæ¨¨ ¢ ¤à ©¢¥à¥, ⮠ᬥ饨¥ = 0
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LD HL,0
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LD D,H
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LD E,L
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;
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.set_hidden: LD (FAT_PARAMETERS.HIDDEN),DE
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LD (FAT_PARAMETERS.HIDDEN + 2),HL
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LD A,(VARIABLES.CurrentDrive)
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LD BC,Dss.DRV.GenIOCTL.GetParams
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RST ToDSS.DRV
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JP C,STOP_ERROR
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;!TODO CHECK ERROR ¥¯®¤å®¤ï騩 ¤¨áª
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;
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LD (VARIABLES.DriveExtendedParameters),A
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EX AF,AF'
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AND #F0
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LD (FAT_PARAMETERS.BPB_PHISICAL_DRIVE_NUMBER),A
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LD (FAT_PARAMETERS.FDD_Number),A
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EXX
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LD (FAT_PARAMETERS.SectorsPerTrack),BC
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LD (FAT_PARAMETERS.HEADS),DE
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EXX
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; !FIXIT ¢ ਠ⠤«ï ¢¨â
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LD A,H
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OR L
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JR NZ,.BPB_BIG_TOTAL_SECTORS
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;
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LD (FAT_PARAMETERS.SectorsPerDrive),DE
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;!TODO ãáâ ®¢¨âì ä« £, çâ® ¬¥«ª¨© ¤¨áª ¥ ¤«ï FAT32 ¯à¨ €¢â®¬ â¥
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JR .STEP1_2
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;
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.BPB_BIG_TOTAL_SECTORS:
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LD (FAT_PARAMETERS.BPB_BIG_TOTAL_SECTORS_L),DE
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LD (FAT_PARAMETERS.BPB_BIG_TOTAL_SECTORS_H),HL
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.STEP1_2: ; à §¬¥à ᥪâ®à
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XOR A
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SRL B
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RRA
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LD C,A
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LD (FAT_PARAMETERS.BytesPerSector),BC
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; à §¬¥à ¤¨áª ¢ ¡ ©â å EDLHA
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CALL MUL32_POWER2
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LD (VARIABLES.VOLUME_SIZE_BYTES),DE
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LD (VARIABLES.VOLUME_SIZE_BYTES + 2),HL
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LD (VARIABLES.VOLUME_SIZE_BYTES + 4),A
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RET
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;--------------;
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;--------------;
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; €¢â®¬ â¨ç¥áª¨© ¢ë¡®à FAT_TYPE, RESERVED_SECTORS, SectorsPerCluster
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.STEP2: CALL AUTO_CHOOSE_FAT_PARAMS
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JR C,STOP_ERROR
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;
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LD A,C
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LD (VARIABLES.FAT_TYPE),A
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CP TABLES.FAT32
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LD HL,(VARIABLES.Fat32_ReservedSectors)
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JR Z,.set_reserved_s
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;
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;!FIXIT ¯à®¢¥àª FDD/HDD
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LD HL,(VARIABLES.FatHDD_ReservedSectors)
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;
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.set_reserved_s:
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LD (FAT_PARAMETERS.RESERVED_SECTORS),HL
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LD HL,(FAT_PARAMETERS.BytesPerSector)
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DEC HL
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SBC HL,DE
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LD HL,(FAT_PARAMETERS.BytesPerSector)
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EX DE,HL
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JR C,.BPS_OK
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; á«ãç ©, ¥á«¨ â ¡«¨çë© ª« áâ¥à ¬¥ìè¥ á¥ªâ®à
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LD A,1
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.BPS_OK: CALL C,DIV16_POWER2
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JR C,STOP_ERROR
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;
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LD (FAT_PARAMETERS.SectorsPerCluster),A
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RET
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;--------------;
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;--------------;
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; ¤ «ìè¥ ãáâ ¢«¨¢ ¥¬ £¥®¬¥âà¨î. “¦¥ ¤®«¦¥ ¡ëâì ¢ë¡à ⨯ FAT
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;IN:
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; FAT_PARAMETERS.BPB_PHISICAL_DRIVE_NUMBER
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; FAT_PARAMETERS.SectorsPerDrive
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; FAT_PARAMETERS.BPB_BIG_TOTAL_SECTORS_L
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; FAT_PARAMETERS.BPB_BIG_TOTAL_SECTORS_H
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;OUT:
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; VARIABLES.NotUsedSpace
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; VARIABLES.total_clusters_L
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; VARIABLES.total_clusters_H
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; CALC_TOTAL_CLUSTERS.fat_size_l
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; CALC_TOTAL_CLUSTERS.fat_size_h
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; FAT_PARAMETERS.DRIVE_TYPE
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; FAT_PARAMETERS.SectorsPerFAT16
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; FAT_PARAMETERS.SectorsPerFAT32
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.STEP3: CALL GET_DRIVE_TYPE
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JR C,STOP_ERROR
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;
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LD A,B
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LD (FAT_PARAMETERS.DRIVE_TYPE),A
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LD HL,(FAT_PARAMETERS.SectorsPerDrive)
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LD A,H
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OR L
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JR NZ,.total_sectors
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;
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LD HL,(FAT_PARAMETERS.BPB_BIG_TOTAL_SECTORS_H)
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LD (CALC_TOTAL_CLUSTERS.t_sec_h),HL
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LD HL,(FAT_PARAMETERS.BPB_BIG_TOTAL_SECTORS_L)
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.total_sectors: LD (CALC_TOTAL_CLUSTERS.t_sec_l),HL
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CALL CALC_TOTAL_CLUSTERS
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LD HL,(CALC_TOTAL_CLUSTERS.fat_size_l)
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LD A,(VARIABLES.FAT_TYPE)
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CP TABLES.FAT32
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JR Z,.it_is_fat32
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;
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LD (FAT_PARAMETERS.SectorsPerFAT16),HL
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RET
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;
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.it_is_fat32: LD (FAT_PARAMETERS.SectorsPerFAT32),HL
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LD HL,(CALC_TOTAL_CLUSTERS.fat_size_h)
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LD (FAT_PARAMETERS.SectorsPerFAT32 + 2),HL
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RET
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;--------------;
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;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
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STOP_ERROR:
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.Save_SP+1: LD SP,0
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;!TODO
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SCF
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;
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RET
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;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
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; data_sectors = total_sectors - reserved_sectors - root_dir_sectors - (num_fats * fat_sz)
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; IN: DE:HL = total_sectors
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; OUT: (VARIABLES.NotUsedSpace)
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; (VARIABLES.total_clusters_L)
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; (VARIABLES.total_clusters_H)
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; (CALC_TOTAL_CLUSTERS.fat_size_l)
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; (CALC_TOTAL_CLUSTERS.fat_size_h)
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CALC_TOTAL_CLUSTERS:
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.t_sec_h+1: LD DE,0
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.t_sec_l+1: LD HL,0
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; data_sectors
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AND A
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; total_sectors - reserved_sectors
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LD BC,(FAT_PARAMETERS.RESERVED_SECTORS)
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SBC HL,BC
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JR NC,.skip_dec_DE
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;
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AND A
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DEC DE
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.skip_dec_DE: ; DE:HL = total_sectors - reserved_sectors
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PUSH DE
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PUSH HL
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;num_fats * fat_sz32; fat_sz32 ¢ ª« áâ¥à å
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.fat_size_l+1: LD BC,0
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.fat_size_h+1: LD DE,0
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LD A,(FAT_PARAMETERS.Number_of_FATs)
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CALL DEBCxA
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;
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LD B,H
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LD C,L
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PUSH IX
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POP DE
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;num_fats * fat_sz32 = BCDE
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;
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LD HL,(VARIABLES.RootDirSectors) ; !FIXIT ¯¨á âì ¯à®æ¥¤ãàã ¢ëç¨á«¥¨ï RootDirSectors ¤® ¢ë§®¢ í⮩
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ADD HL,DE
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JR NC,.skip_inc
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;
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AND A
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INC BC
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.skip_inc: EX DE,HL
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;num_fats * fat_sz32 + root_dir_sectors = BC:DE
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;
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POP HL
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SBC HL,DE
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EX DE,HL
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POP HL
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SBC HL,BC
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JR C,STOP_ERROR
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; data_sectors = HL:DE
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;
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; total_clusters
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LD A,(FAT_PARAMETERS.SectorsPerCluster)
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CALL HLDE_Div_A
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LD (VARIABLES.NotUsedSpace),A
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; total_clusters = HL:DE
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;
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LD (VARIABLES.total_clusters_L),DE
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LD (VARIABLES.total_clusters_H),HL
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; fat_size
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LD B,D
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LD C,E
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EX DE,HL
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; total_clusters = DE:BC
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;
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LD A,(VARIABLES.FAT_TYPE)
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.call_calc: CALL DEBCxA
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;DE:BC * A = HL:IX
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;
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LD BC,(FAT_PARAMETERS.BytesPerSector)
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LD A,(VARIABLES.FAT_TYPE)
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CP TABLES.FAT12
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JR NZ,.no_sla
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;
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SLA C
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RL B
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.no_sla: DEC BC
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ADD IX,BC
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JR NC,.skip_inc_HL
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;
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INC HL
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.skip_inc_HL: INC BC
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CALL HLIX_div_BC
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; ®ªà㣫¥¨¥ ¢¯¥àñ¤
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LD A,D
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OR E
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JR Z,.set_new_size
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;
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LD BC,1
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ADD IX,BC
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DEC C
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ADC HL,BC
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; fat_size = HLIX
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.set_new_size: LD DE,(.fat_size_l)
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LD BC,(.fat_size_h)
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LD (.fat_size_l),IX
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LD (.fat_size_h),HL
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AND A
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SBC HL,BC
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JR NZ,.next_loop
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;
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PUSH IX
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POP HL
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SBC HL,DE
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RET Z
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.next_loop: ;
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.counter+1: LD A,32 ; loop counter
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DEC A
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LD (.counter),A
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JP NZ,CALC_TOTAL_CLUSTERS
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JP STOP_ERROR
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;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
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;!TODO ¤®¤¥« âì ¤«ï ¤¨áª¥â
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GET_DRIVE_TYPE: LD A,(FAT_PARAMETERS.BPB_PHISICAL_DRIVE_NUMBER)
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CP DRIVE_CODES.SPRINTER.ATA
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LD B,BOOT_SECTOR.Hard_Drive
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RET Z
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; ¤¨áª¥âë ¨ ª®£¤ -¨¡ã¤ì ATAPI
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SCF
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RET
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;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
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; -> ¤®«¦® ¡ëâì ãáâ ®¢«¥® § 票¥ VOLUME_SIZE_BYTES.
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; <- DE - CLUSTER SIZE.
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; C - FAT TYPE.
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AUTO_CHOOSE_FAT_PARAMS:
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LD DE,(VARIABLES.VOLUME_SIZE_BYTES + 3)
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LD IX,TABLES.FAT_TYPES
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LD A,TABLES.FAT_TYPES.Records
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LD BC,TABLES.FAT_TYPES.LineSize
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.loop: LD L,(IX)
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LD H,(IX+1)
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AND A
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SBC HL,DE
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JR C,.found
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JR Z,.found
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;
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ADD IX,BC
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DEC A
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JR NZ,.loop
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; ã á FAT12 c ª« áâ¥à®¬ ¢ 512
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; ¤® ¯à®¢¥à¨âì à §¤¥« ¬¨¨¬ «ìë© à §¬¥à ¤«ï FAT
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; sec_bpb + sec_fat + sec_root_dir + sec_for_data
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LD A,D
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OR E
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JR NZ,.found
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;
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LD HL,(VARIABLES.VOLUME_SIZE_BYTES + 1)
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LD DE,8
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SBC HL,DE
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RET C ; à §¤¥« ᫨誮¬ ¬ « ¤«ï FAT12 (<2048)
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.found: ; ¤®áâ ñ¬ ¯ à ¬¥âàë ¨§ â ¡«¨æë
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DI
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LD (.restore_SP),SP
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LD SP,IX
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POP HL ; 宫®á⮥
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POP DE ; CLUSTER SIZE
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POP BC ; C - FAT TYPE
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LD A,C
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.restore_SP+1: LD SP,0
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EI
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AND A
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RET
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;-----------------------------------------------------------------------
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;-----------------------------------------------------------------------
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FORMAT_DRIVE: CALL CLEAN_SECTOR_BUFFER
|
||
;
|
||
LD HL,FAT_PARAMETERS.PART1
|
||
LD DE,SECTOR_BUFFER
|
||
LD BC,FAT_PARAMETERS.PART1_SIZE
|
||
LDIR
|
||
;
|
||
LD A,(VARIABLES.FAT_TYPE)
|
||
CP TABLES.FAT32
|
||
;!FIXIT
|
||
JP NZ,STOP_ERROR
|
||
;
|
||
CALL MAKE_SYS_SECTORS
|
||
CALL CLEAN_SECTOR_BUFFER
|
||
; clean all fat tables at drive
|
||
LD A,(VARIABLES.FAT_TYPE)
|
||
CP TABLES.FAT32
|
||
LD BC,(FAT_PARAMETERS.SectorsPerFAT32)
|
||
LD DE,(FAT_PARAMETERS.SectorsPerFAT32 + 2)
|
||
JR Z,.its_fat32
|
||
;
|
||
LD BC,(FAT_PARAMETERS.SectorsPerFAT16)
|
||
LD DE,0
|
||
.its_fat32: LD (.add_l),BC
|
||
LD (.add_h),DE
|
||
LD A,(FAT_PARAMETERS.Number_of_FATs)
|
||
CALL DEBCxA
|
||
; HL:IX - ¢á¥£® ᥪâ®à®¢ ¤«ï § ¯¨á¨
|
||
PUSH HL
|
||
PUSH IX
|
||
EXX
|
||
POP DE
|
||
POP HL
|
||
EXX
|
||
; HL':DE' - ¢á¥£® ᥪâ®à®¢ ¤«ï § ¯¨á¨
|
||
;
|
||
LD IX,(FAT_PARAMETERS.RESERVED_SECTORS)
|
||
LD HL,0
|
||
EXX
|
||
.write_loop: PUSH HL
|
||
PUSH DE
|
||
EXX
|
||
PUSH HL
|
||
PUSH IX
|
||
; HL:IX - ⥪ã騩 ᥪâ®à FAT
|
||
CALL WRITE_SECTOR_BUFFER
|
||
;
|
||
POP IX
|
||
POP HL
|
||
LD BC,1
|
||
ADD IX,BC
|
||
DEC C
|
||
ADC HL,BC
|
||
EXX
|
||
LD BC,1
|
||
POP HL
|
||
SBC HL,BC
|
||
POP DE
|
||
EX DE,HL
|
||
DEC C
|
||
SBC HL,BC
|
||
JR NZ,.write_loop
|
||
;
|
||
LD A,D
|
||
OR E
|
||
JR NZ,.write_loop
|
||
EXX
|
||
; make fat table
|
||
LD HL,(FAT_PARAMETERS.DRIVE_TYPE)
|
||
LD H,#FF
|
||
LD (SECTOR_BUFFER),HL
|
||
LD L,H
|
||
LD (SECTOR_BUFFER + 2),HL
|
||
LD A,(VARIABLES.FAT_TYPE)
|
||
CP TABLES.FAT12
|
||
JR NZ,.not_fat12
|
||
; fat12
|
||
XOR A
|
||
LD (SECTOR_BUFFER + 3),A
|
||
JR .write_fat
|
||
;
|
||
.not_fat12 CP TABLES.FAT16
|
||
JR Z,.write_fat
|
||
;fat32
|
||
;
|
||
LD HL,.Fat32Data
|
||
LD DE,SECTOR_BUFFER + 3
|
||
LD BC,.Fat32Data.Size
|
||
LDIR
|
||
;
|
||
.write_fat: LD A,(FAT_PARAMETERS.Number_of_FATs)
|
||
LD HL,0
|
||
LD D,H
|
||
LD E,L
|
||
PUSH HL
|
||
POP IX
|
||
LD BC,(FAT_PARAMETERS.RESERVED_SECTORS)
|
||
;
|
||
.write_tbl_fat: ADD IX,BC
|
||
ADC HL,DE
|
||
PUSH AF
|
||
PUSH HL
|
||
PUSH IX
|
||
; HL:IX - ⥪ã騩 ᥪâ®à FAT
|
||
;
|
||
CALL WRITE_SECTOR_BUFFER
|
||
;
|
||
.add_l+1: LD BC,0
|
||
.add_h+1: LD DE,0
|
||
POP IX
|
||
POP HL
|
||
POP AF
|
||
DEC A
|
||
JR NZ,.write_tbl_fat
|
||
RET
|
||
;
|
||
.Fat32Data: DB #0F,#FF,#FF,#FF,#FF,#FF,#FF,#FF,#0F
|
||
.Fat32Data.Size EQU $-.Fat32Data
|
||
;-----------------------------------------------------------------------
|
||
|
||
|
||
;-----------------------------------------------------------------------
|
||
MAKE_SYS_SECTORS:
|
||
LD HL,FAT_PARAMETERS.PART2_FAT32
|
||
LD BC,FAT_PARAMETERS.PART2_FAT32_SIZE + FAT_PARAMETERS.PART3_SHARED_SIZE
|
||
LDIR
|
||
;
|
||
LD HL,#AA55
|
||
LD (SECTOR_BUFFER + BOOT_SECTOR.MBR_SIGNATURE),HL
|
||
;
|
||
LD HL,0
|
||
LD IX,0
|
||
CALL WRITE_SECTOR_BUFFER
|
||
LD HL,0
|
||
LD IX,(FAT_PARAMETERS.CopyBootSector)
|
||
CALL WRITE_SECTOR_BUFFER
|
||
;
|
||
LD A,(VARIABLES.FAT_TYPE)
|
||
CP TABLES.FAT32
|
||
RET NZ
|
||
;
|
||
CALL CLEAN_SECTOR_BUFFER
|
||
LD HL,#AA55
|
||
LD (SECTOR_BUFFER + _sFSinfo.SECTOR_SIGNATURE),HL
|
||
;
|
||
LD HL,#5252
|
||
LD (SECTOR_BUFFER + _sFSinfo.LEAD_SIGNATURE),HL
|
||
LD HL,#4161
|
||
LD (SECTOR_BUFFER + _sFSinfo.LEAD_SIGNATURE + 2),HL
|
||
;
|
||
LD HL,#7272
|
||
LD (SECTOR_BUFFER + _sFSinfo.DATA_SIGNATURE),HL
|
||
LD HL,#6141
|
||
LD (SECTOR_BUFFER + _sFSinfo.DATA_SIGNATURE + 2),HL
|
||
;
|
||
LD HL,(VARIABLES.FAT32_RootDirClusters)
|
||
LD DE,(FAT_PARAMETERS.RootDirStartCluster) ; FIXED!
|
||
ADD HL,DE
|
||
LD DE,(FAT_PARAMETERS.RootDirStartCluster + 2)
|
||
JR NC,.no_inc_de
|
||
;
|
||
INC DE
|
||
.no_inc_de: LD (SECTOR_BUFFER + _sFSinfo.FIRST_FREE_CLUSTER),HL
|
||
LD (SECTOR_BUFFER + _sFSinfo.FIRST_FREE_CLUSTER + 2),DE
|
||
;
|
||
LD B,H
|
||
LD C,L
|
||
LD HL,(VARIABLES.total_clusters_L)
|
||
LD IX,(VARIABLES.total_clusters_H)
|
||
SBC HL,BC
|
||
LD (SECTOR_BUFFER + _sFSinfo.FREE_CLUSTERS_COUNT),HL
|
||
PUSH IX
|
||
POP HL
|
||
SBC HL,DE
|
||
LD (SECTOR_BUFFER + _sFSinfo.FREE_CLUSTERS_COUNT + 2),HL
|
||
;
|
||
LD IX,(FAT_PARAMETERS.FSINFO_Sector)
|
||
LD HL,0
|
||
CALL WRITE_SECTOR_BUFFER
|
||
;
|
||
LD HL,#FFFF
|
||
LD (SECTOR_BUFFER + _sFSinfo.FIRST_FREE_CLUSTER),HL
|
||
LD (SECTOR_BUFFER + _sFSinfo.FIRST_FREE_CLUSTER + 2),HL
|
||
LD (SECTOR_BUFFER + _sFSinfo.FREE_CLUSTERS_COUNT),HL
|
||
LD (SECTOR_BUFFER + _sFSinfo.FREE_CLUSTERS_COUNT + 2),HL
|
||
INC HL
|
||
LD IX,(FAT_PARAMETERS.CopyBootSector)
|
||
LD DE,(FAT_PARAMETERS.FSINFO_Sector)
|
||
ADD IX,DE
|
||
PUSH IX
|
||
CALL WRITE_SECTOR_BUFFER
|
||
;
|
||
CALL CLEAN_SECTOR_BUFFER
|
||
LD HL,#AA55
|
||
LD (SECTOR_BUFFER + _sFSinfo.SECTOR_SIGNATURE),HL
|
||
LD HL,0
|
||
LD IX,(FAT_PARAMETERS.FSINFO_Sector)
|
||
INC IX
|
||
CALL WRITE_SECTOR_BUFFER
|
||
POP IX
|
||
INC IX
|
||
LD HL,0
|
||
CALL WRITE_SECTOR_BUFFER
|
||
RET
|
||
;-----------------------------------------------------------------------
|
||
|
||
|
||
;-----------------------------------------------------------------------
|
||
CLEAN_SECTOR_BUFFER:
|
||
LD HL,SECTOR_BUFFER
|
||
LD DE,SECTOR_BUFFER + 1
|
||
LD BC,4096 - 1 ; ¡ã¤ã饥, ¤«ï ᥪâ®à®¢ ¡®«ìè¥ 512
|
||
LD (HL),0
|
||
LDIR
|
||
RET
|
||
;-----------------------------------------------------------------------
|
||
|
||
|
||
;-----------------------------------------------------------------------
|
||
;!FIXIT check error
|
||
WRITE_SECTOR_BUFFER:
|
||
LD A,(VARIABLES.CurrentDrive)
|
||
.sectors+2: LD BC,256*1 + Dss.DRV.Write
|
||
LD DE,SECTOR_BUFFER
|
||
JP ToDSS.DRV
|
||
;-----------------------------------------------------------------------
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////////
|
||
include 'math.asm'
|
||
////////////////////////////////////////////////////////////////////////
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////////
|
||
include 'data.z80'
|
||
////////////////////////////////////////////////////////////////////////
|
||
|
||
|
||
////////////////////////////////////////////////////////////////////////
|
||
SECTOR_BUFFER EQU $
|
||
.SIZE EQU 4096
|
||
ASSERT SECTOR_BUFFER + SECTOR_BUFFER.SIZE < #C000, "ERROR: SECTOR_BUFFER"
|
||
////////////////////////////////////////////////////////////////////////
|