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Estex-DSS/DSS/DOS_FM.ASM

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;[BEGIN]
;//MODULE: DOS_FM
;//CREATE: 19-05-1998 AUTHOR: Denis Parinov
;//UPDATE: 24-10-1999 DNS Restore module
;---------------------------------------------------------------
;Rev Date Name Description
;---------------------------------------------------------------
;R01 16-11-1999 DNS ERROR READING FAT CHAIN
;---------------------------------------------------------------
;FMS DB FMCOUNT
;ACCESS MODE:
; 00 - READ/WRITE
; 01 - READ
; 02 - WRITE
;FM_BUF:
;File Manipulator (FM)
; BYTE '. ' ;+00 NAME
; BYTE ' ' ;+08 EXT
; BYTE #10 ;+11 ATTRIBUT
; BYTE 0 ;+12 RESERVED; !TODO á«¥¤ãî騩 ª« áâ¥à ¤«ï ç⥭¨ï
; BYTE 0 ;+13 RESERVED; !TODO á«¥¤ãî騩 ª« áâ¥à ¤«ï § ¯¨á¨
; BLOCK 8,0 ;+14 RESERVED
; WORD #0000 ;+22 TIME
; WORD #0000 ;+24 DATE
; WORD #0000 ;+26 START CLUSTER
; DWORD #0000 ;+28 SIZE FILE
; DWORD #0000 ;+32 FILE POSITION (FP)
; WORD #0000 ;+36 DIRECTORY CLUSTER
; WORD #0000 ;+38 HANDLE NUMBER
; BYTE #00 ;+40 DRIVE OR CURRENT
; BYTE #00 ;+41 ACCESS MODE
; BYTE #00 ;+42 TASK
; BYTE #00 ;+43 EMPTY
/*
;!TEST
FM_BUF: _sFM
.Size EQU _sFM
BLOCK (FMCOUNT-1)*FM_BUF.Size, 0
*/
; ­  ¢ë室¥ ¡¥§ ®è¨¡®ª IY 㪠§ë¢ ¥â ­  ä ©«®¢ë© ¬ ­¨¯ã«ïâ®à
MACRO _mFM_FIND
CP FMCOUNT
JR NC,ABS_FM
PUSH DE
LD IY,CORE_BUFFERS.FM_BUF
LD DE,CORE_BUFFERS.FM_BUF.Size
AND A
JR Z,.endLoop
.loop: ADD IY,DE
DEC A
JR NZ,.loop
.endLoop:
POP DE
; A=0
OR (IY) ;+00 NAME
ENDM
////////////////////////////////////////////////////////////////////////
SET_FM: _mFM_FIND
LD A,DSS_Error.sys.NO_ERROR
RET NZ
ABS_FM LD A,DSS_Error.sys.INVALID_HANDLE
SCF
RET
RES_FM: _mFM_FIND
LD A,DSS_Error.sys.INVALID_HANDLE
;EXX
SCF
RET Z
XOR A
LD (IY+0),A
RET
;
GET_FM: LD B,FMCOUNT
LD C,#FF
LD IY,CORE_BUFFERS.FM_BUF - CORE_BUFFERS.FM_BUF.Size
LD DE,CORE_BUFFERS.FM_BUF.Size
.loop: ADD IY,DE
INC C
LD A,(IY+0)
OR A
RET Z
DJNZ .loop
LD A,DSS_Error.sys.NO_HANDLES
SCF
RET
/*
;!TEST CHECK LOCKING 10/11/2023
GET_FM: LD IY,0
LD (.freeHandle),IY
;
LD B,FMCOUNT
LD C,#FF
LD IY,CORE_BUFFERS.FM_BUF - CORE_BUFFERS.FM_BUF.Size
LD DE,CORE_BUFFERS.FM_BUF.Size
.loop: ADD IY,DE
INC C
; CHECK LOCKING
;
.cont: LD A,(IY+0)
OR A
RET Z
DJNZ .loop
LD A,DSS_Error.sys.NO_HANDLES
SCF
RET
*/
; HL:IX - OFFSET POINTER
; A - FILE MANIPULATOR
MOVE_FP:
CALL SET_FM
RET C
INC B
DEC B
JR Z,.F_start
DEC B
JR Z,.F_current
DEC B
JR Z,.B_end
LD A,DSS_Error.sys.INVALID_FUNCTION
SCF
RET
;from Start File
.F_start:
; B=0
LD C,B
LD D,B
LD E,B
JP .DO
;from End File
.B_end: LD C,(IY+_sFM.F_SIZE)
LD B,(IY+_sFM.F_SIZE+1)
LD E,(IY+_sFM.F_SIZE+2)
LD D,(IY+_sFM.F_SIZE+3)
JP .DO
;from Current Position
.F_current:
LD C,(IY+_sFM.F_POSITION)
LD B,(IY+_sFM.F_POSITION+1)
LD E,(IY+_sFM.F_POSITION+2)
LD D,(IY+_sFM.F_POSITION+3)
.DO: ADD IX,BC
ADC HL,DE
LD D,XH
LD E,XL
LD (IY+_sFM.F_POSITION),E
LD (IY+_sFM.F_POSITION+1),D
LD (IY+_sFM.F_POSITION+2),L
LD (IY+_sFM.F_POSITION+3),H
XOR A
RET
;FP COMPARE
; CY - FILE POINTER > SIZE
; NC - FILE POINTER < SIZE
MOVE_CP:
LD L,(IY+_sFM.F_SIZE)
LD H,(IY+_sFM.F_SIZE+1)
LD E,(IY+_sFM.F_POSITION)
LD D,(IY+_sFM.F_POSITION+1)
AND A
SBC HL,DE
LD L,(IY+_sFM.F_SIZE+2)
LD H,(IY+_sFM.F_SIZE+3)
LD E,(IY+_sFM.F_POSITION+2)
LD D,(IY+_sFM.F_POSITION+3)
SBC HL,DE
RET
;--------------------
ECL2:
;[x] SAVE CLUSTER AFTER READ ;!TEST
POP BC
;
POP BC
POP DE
AND A
RET
BLOKRD0 POP BC
POP DE
SCF
RET
;READ SECTORS OF FILE
;HL:DE - FP (in sectors)
; B - Amount sectors
BLOK_RD: PUSH BC
LD (READ.MEM),IX
LD A,(CORE_BUFFERS.BootSector.S_P_C) ;SECTORS PER CLUSTER
LD C,A
LD B,0 ;!FIXIT
;HL:DE / BC => DE:IX HL-OSTATOK
CALL DIV_for_SPC
;!FIXIT ¤ «¥¥ § â®çª  ­  â®, çâ® ¢ DE ¢á¥£¤  0 - à §¤¥« ­¥ ¡®«ìè¥ 2Gb
LD B,XH
LD C,XL
PUSH HL ;RESIDUE
LD L,(IY+_sFM.ST_CLUSTER) ;START CLUSTER
LD H,(IY+_sFM.ST_CLUSTER+1)
LD A,H
OR L
;[x] SAVE CLUSTER AFTER READ ;!TEST
;JR NZ,BLOKRD2
PUSH BC
JR NZ,.saveClustersOffset
;
JP ECL2 ;R01 JR BLOKRD0
.saveClustersOffset:
;[x] SAVE CLUSTER AFTER READ ;!TEST
LD E,(IY+_sFM.KnownCluster_L)
LD D,(IY+_sFM.KnownCluster_H)
LD A,D
OR E
JR Z,BLOKRD2
PUSH DE
PUSH HL
PUSH BC
LD E,(IY+_sFM.KnownOffset_L)
LD D,(IY+_sFM.KnownOffset_H)
LD A,D
OR E
JR Z,.noOptimization_1
POP HL
AND A
SBC HL,DE
JR C,.noOptimization_2
LD C,L
LD B,H
POP HL
POP DE
EX DE,HL
JP BLOKRD2
.noOptimization_1:
POP BC
.noOptimization_2:
POP HL
POP DE
JP BLOKRD2
;
BLOKRD1:
PUSH BC
CALL R_F_FAT
POP BC
JR C,ECL2 ;R01
EX DE,HL
DEC BC
BLOKRD2:
LD A,B ; ‚‘ - ᬥ饭¨¥ ¢­ãâਠ䠩«  ¢ ª« áâ¥à å
OR C
JR NZ,BLOKRD1
;[x] SAVE CLUSTER AFTER READ ;!TEST
LD (IY+_sFM.KnownCluster_L),L
LD (IY+_sFM.KnownCluster_H),H
POP BC
LD (IY+_sFM.KnownOffset_L),C
LD (IY+_sFM.KnownOffset_H),B
;
POP DE
POP BC
LD A,(CORE_BUFFERS.BootSector.S_P_C)
SUB E
LD C,A ;\
CP B ; \
JR C,BLOKRD3 ;SIZE > RESIDUE CLUSTER ; \
LD C,B ;SIZE < CLUSTER ;->-|--> ; !TODO à §®¡à âìáï
BLOKRD3 LD A,B ; /
SUB C ; /
LD B,A ;/
PUSH HL
PUSH BC
PUSH DE
CALL NSECTOR
POP DE
ADD IX,DE
JR NC,BLOKRD4
INC HL
BLOKRD4 LD DE,(READ.MEM)
LD A,(FatBuffer.DRIVE)
LD B,C
LD C,Dss.DRV.Read
RST ToDSS.DRV
JP C,BLOKRD0
POP BC
LD HL,(READ.MEM)
LD DE,(CORE_BUFFERS.BootSector.B_P_S)
BLOKRD5 ADD HL,DE
DEC C
JR NZ,BLOKRD5
LD (READ.MEM),HL
POP DE
LD A,B
OR A
RET Z
BLOKRD6 LD HL,CORE_BUFFERS.BootSector.S_P_C
LD A,B
SUB (HL)
LD B,A
LD C,(HL)
JR NC,BLOKRD7
LD B,0
ADD A,(HL) ;0 AND CF
LD C,A
OR A ;CLEAR CF
RET Z
BLOKRD7 EX DE,HL
PUSH BC
CALL R_F_FAT
POP BC
JP C,ECL1 ;R01?
EX DE,HL
PUSH HL
PUSH BC
CALL NSECTOR
LD DE,(READ.MEM)
LD A,(FatBuffer.DRIVE)
LD B,C
LD C,Dss.DRV.Read
RST ToDSS.DRV
JP C,BLOKRD0
POP BC
LD HL,(READ.MEM)
LD DE,(CORE_BUFFERS.BootSector.B_P_S)
BLOKRD8 ADD HL,DE
DEC C
JR NZ,BLOKRD8
LD (READ.MEM),HL
POP DE
JR BLOKRD6
ECL1 AND A
RET
;--------------------
BLOKWRC:
POP BC
;[x] SAVE CLUSTER AFTER WRITE ;!TEST
POP BC
;
BLOK_WR.ErrorWrite:
POP BC
POP DE
LD A,DSS_Error.sys.WRITE_ERROR
SCF
RET
;WRITE SECTORS OF FILE
;HL:DE - FP (in sectors), IX - data in RAM
; B - Amount sectors
BLOK_WR:
PUSH BC
LD (READ.MEM),IX
LD A,(CORE_BUFFERS.BootSector.S_P_C) ;SECTORS PER CLUSTER
LD C,A
LD B,0
;HL:DE / BC => DE:IX HL-OSTATOK
CALL DIV_for_SPC
LD B,XH
LD C,XL
PUSH HL ;RESIDUE
LD L,(IY+_sFM.ST_CLUSTER) ;START CLUSTER
LD H,(IY+_sFM.ST_CLUSTER+1)
LD A,H
OR L
;[x] SAVE CLUSTER AFTER WRITE ;!TEST
;JR NZ,BLOKWR2
PUSH BC
JR NZ,.saveClustersOffset
;
PUSH BC
CALL G_CLUST
JR C,BLOKWRC
LD (IY+_sFM.ST_CLUSTER),L
LD (IY+_sFM.ST_CLUSTER+1),H
LD DE,(FatBuffer.ENDCLUS)
CALL W_T_FAT
PUSH HL
CALL WR_FAT
POP HL
POP BC
JP .WR2
.saveClustersOffset:
;[x] SAVE CLUSTER AFTER WRITE ;!TEST
LD E,(IY+_sFM.KnownCluster_L)
LD D,(IY+_sFM.KnownCluster_H)
LD A,D
OR E
JR Z,.WR2
;
PUSH DE
PUSH HL
PUSH BC
LD E,(IY+_sFM.KnownOffset_L)
LD D,(IY+_sFM.KnownOffset_H)
LD A,D
OR E
JR Z,.noOptimization_1
;
POP HL
AND A
SBC HL,DE
JR C,.noOptimization_2
;
LD C,L
LD B,H
POP HL
POP DE
;
EX DE,HL
JP .WR2
.noOptimization_1:
POP BC
.noOptimization_2:
POP HL
POP DE
JP .WR2
;
.loop: PUSH BC
CALL R_F_FAT
JR NC,.WRB
PUSH HL
CALL INC_FAT
POP HL
JR C,BLOKWRC
CALL R_F_FAT
.WRB: POP BC
EX DE,HL
DEC BC
.WR2: LD A,B
OR C
JR NZ,.loop
;[x] SAVE CLUSTER AFTER WRITE ;!TEST
LD (IY+_sFM.KnownCluster_L),L
LD (IY+_sFM.KnownCluster_H),H
POP BC
LD (IY+_sFM.KnownOffset_L),C
LD (IY+_sFM.KnownOffset_H),B
;
POP DE
POP BC
LD A,(CORE_BUFFERS.BootSector.S_P_C)
SUB E
LD C,A
CP B
JR C,.WR3 ;SIZE > RESIDUE CLUSTER
LD C,B ;SIZE < CLUSTER
.WR3: LD A,B
SUB C
LD B,A
PUSH HL
PUSH BC
PUSH DE
CALL NSECTOR
POP DE
ADD IX,DE
JR NC,.WR4
INC HL
; DOUBLE 1
.WR4: LD DE,(READ.MEM)
LD A,(FatBuffer.DRIVE)
LD B,C
LD C,Dss.DRV.Write
RST ToDSS.DRV
JP C,.ErrorWrite
POP BC
LD HL,(READ.MEM)
LD DE,(CORE_BUFFERS.BootSector.B_P_S)
.loop2: ADD HL,DE
DEC C
JR NZ,.loop2
LD (READ.MEM),HL
POP DE
;
LD A,B
OR A
RET Z
.WR6: LD HL,CORE_BUFFERS.BootSector.S_P_C
LD A,B
SUB (HL)
LD B,A
LD C,(HL)
JR NC,.WR7
LD B,0
ADD A,(HL) ;0 AND CF
LD C,A
OR A ;CLEAR CF
RET Z
.WR7: EX DE,HL
PUSH BC
CALL R_F_FAT
JR NC,.WR9
PUSH HL
CALL INC_FAT
POP HL
JR C,.ErrorFull
CALL R_F_FAT
.WR9: POP BC
EX DE,HL
PUSH HL
PUSH BC
CALL NSECTOR
; DOUBLE 1
LD DE,(READ.MEM)
LD A,(FatBuffer.DRIVE)
LD B,C
LD C,Dss.DRV.Write
RST ToDSS.DRV
JP C,.ErrorWrite
POP BC
LD HL,(READ.MEM)
LD DE,(CORE_BUFFERS.BootSector.B_P_S)
.loop3: ADD HL,DE
DEC C
JR NZ,.loop3
LD (READ.MEM),HL
POP DE
;
JR .WR6
.ErrorFull:
POP BC
LD A,DSS_Error.sys.DISK_FULL
SCF
RET
TSTSIZE:
XOR A
LD (READ.COD),A
LD L,(IY+_sFM.F_POSITION) ;FP LOW
LD H,(IY+_sFM.F_POSITION+1)
ADD HL,DE
EXX
LD DE,0
LD L,(IY+_sFM.F_POSITION+2) ;FP HIGH
LD H,(IY+_sFM.F_POSITION+3)
ADC HL,DE
EXX ;HL':HL - NEW FP
LD C,(IY+_sFM.F_SIZE)
LD B,(IY+_sFM.F_SIZE+1) ;SIZE LOW
AND A
SBC HL,BC
EXX
LD C,(IY+_sFM.F_SIZE+2) ;SIZE HIGH
LD B,(IY+_sFM.F_SIZE+3)
SBC HL,BC
EXX
RET C ;OK READ ALL
EX DE,HL
SBC HL,DE ;VERY BIG
EX DE,HL
LD A,#FF
LD (READ.COD),A
RET
; HL - ADDRESS
; DE - SIZE
; A - FM
;READ_FN:
; _mSavePath 1
; HL - ADDRESS
; DE - SIZE
; A - FM
READ: LD (.R_POINT),HL
LD (.S_POINT),HL
CALL SET_FM
RET C
CALL TSTSIZE
;!FIXIT ¬®¦­® ¯¥à¥­¥á⨠¢ ­ ç «® ¯à®æ¥¤ãàë
LD A,D
OR E
JP Z,.NOREAD
;
PUSH DE
LD A,(IY+_sFM.DRIVE)
CALL OPENDSK
JP C,.ERR_1
;<3B> áçñâ ᬥ饭¨ï ¢ ᥪâ®à å
; LD C,(IY+_sFM.F_POSITION)
; LD E,(IY+_sFM.F_POSITION+1)
; LD A,E
; AND #01
; LD B,A
; LD D,(IY+_sFM.F_POSITION+2)
; LD L,(IY+_sFM.F_POSITION+3)
; LD H,0
; OR A
; RR L
; RR D
; RR E
LD H,0
LD L,(IY+_sFM.F_POSITION+3)
LD D,(IY+_sFM.F_POSITION+2)
LD E,(IY+_sFM.F_POSITION+1)
LD A,E
AND #01
LD B,A
LD C,(IY+_sFM.F_POSITION)
;OR A
RR L
RR D
RR E
;HL:DE FP (in sectors)
;BC FP residue (in bytes)
;
;LD A,B
OR C
JP NZ,.ROV1
.ROV4: POP BC
PUSH BC
SRL B
JR Z,.ROV2
LD (.SECTORH),HL
LD (.SECTORL),DE
.R_POINT+2: LD IX,0
CALL BLOK_RD
JP C,.ERR_1
LD DE,(.R_POINT)
.MEM+1: LD HL,0 // LD HL,(READMEM)
AND A
SBC HL,DE
LD C,H
LD B,0
ADD HL,DE
LD (.R_POINT),HL
SRL C
.SECTORL+1: LD HL,0 // LD HL,(SECTORL)
ADD HL,BC
EX DE,HL
.SECTORH+1: LD HL,0 // LD HL,(SECTORH)
LD C,B
ADC HL,BC
.ROV2: POP BC
LD A,B
AND #01
LD B,A
OR C
JP Z,.ROV6
PUSH BC
LD IX,CORE_BUFFERS.BUFFER+#C000
LD B,1
IN A,(SLOT3)
PUSH AF
IN A,(SLOT0)
OUT (SLOT3),A
CALL BLOK_RD
POP BC
LD C,SLOT3
OUT (C),B
JP C,.ERR_1
LD HL,CORE_BUFFERS.BUFFER
LD DE,(.R_POINT)
POP BC
LDIR
LD (.R_POINT),DE
.ROV6: LD HL,(.R_POINT)
.S_POINT+1: LD DE,0
;EX DE,HL
AND A
SBC HL,DE
PUSH HL
EX DE,HL
LD XH,D
LD XL,E
LD HL,0
CALL MOVE_FP.F_current
POP DE
.NOREAD:
.COD+1: LD A,0
OR A
RET
.ROV1: PUSH BC
PUSH HL
PUSH DE
LD IX,CORE_BUFFERS.BUFFER+#C000
LD B,1
IN A,(SLOT3)
PUSH AF
IN A,(SLOT0)
OUT (SLOT3),A
CALL BLOK_RD
POP BC
LD C,SLOT3
OUT (C),B
POP HL
JP C,.ERR_3
LD BC,1
ADD HL,BC
EX DE,HL
POP HL
LD C,B
ADC HL,BC
EXX
POP DE
LD HL,512 ;!HARDCODE
AND A
SBC HL,DE
LD B,H
LD C,L
POP HL
AND A
SBC HL,BC
JR NC,.ROV3
ADD HL,BC
LD B,H
LD C,L
LD HL,0 ;!TODO ¬®¦­® âãâ ã¯à®áâ¨âì ¤ «ì­¥©èãî ¢¥âªã?
.ROV3: PUSH HL
LD HL,CORE_BUFFERS.BUFFER
ADD HL,DE
LD DE,(.R_POINT)
LDIR
LD (.R_POINT),DE
EXX
JP .ROV4
.ERR_3: POP HL
.ERR_2: POP HL
.ERR_1: POP BC
SCF
RET
PWERR3: POP HL
PWERR2: POP HL
PWERR1: POP BC
SCF
RET
RD_ONLY: POP DE
LD A,DSS_Error.sys.READONLY
SCF
RET
; HL - ADDRESS
; DE - SIZE
; A - FM
WRITE: LD (.R_POINT),HL
LD (.S_POINT),HL
PUSH DE
CALL SET_FM
JR C,PWERR1
LD A,(IY+_sFM.ACCESS_MODE)
AND FAT_ATTR.READ_ONLY
JR NZ,RD_ONLY
SET 7,(IY+_sFM.ACCESS_MODE)
SET 5,(IY+_sFM.ATTRIBUT)
LD A,(IY+_sFM.DRIVE)
CALL OPENDSK
JR C,PWERR1
;
LD C,(IY+_sFM.F_POSITION)
LD A,(IY+_sFM.F_POSITION+1)
LD E,A
AND #01
LD B,A
LD D,(IY+_sFM.F_POSITION+2)
LD L,(IY+_sFM.F_POSITION+3)
LD H,0
OR A
RR L
RR D
RR E
; HL:DE - FP (in sectors)
; BC - FP residue (in bytes)
LD A,B
OR C
JP NZ,.WOV1
.WOV4: POP BC
PUSH BC
SRL B
JR Z,.WOV2
PUSH HL
PUSH DE
PUSH BC
.R_POINT+2:
LD IX,0
CALL BLOK_WR
POP BC
JR C,PWERR3
LD C,B
LD HL,(.R_POINT)
LD DE,#0200 ;!HARDCODE
.WOV5: ADD HL,DE
DJNZ .WOV5
; B=0
LD (.R_POINT),HL
;LD B,0
POP HL
ADD HL,BC
EX DE,HL
POP HL
LD C,B
ADC HL,BC
.WOV2: POP BC
LD A,B
AND #01
LD B,A
OR C
JR Z,.WOV6
PUSH HL
PUSH DE
PUSH BC
LD IX,CORE_BUFFERS.BUFFER+#C000
LD B,1
IN A,(SLOT3)
PUSH AF
IN A,(SLOT0)
OUT (SLOT3),A
CALL BLOK_RD
POP BC
LD C,SLOT3
OUT (C),B
LD DE,CORE_BUFFERS.BUFFER
LD HL,(.R_POINT)
POP BC
JP C,PWERR2
LDIR
LD (.R_POINT),HL
POP DE
POP HL
LD IX,CORE_BUFFERS.BUFFER+#C000
LD B,1
IN A,(SLOT3)
PUSH AF
IN A,(SLOT0)
OUT (SLOT3),A
CALL BLOK_WR
POP BC
LD C,SLOT3
OUT (C),B
RET C
.WOV6: LD HL,(.R_POINT)
.S_POINT+1: LD DE,0
; CF=0
;AND A
SBC HL,DE
PUSH HL
EX DE,HL
LD XH,D
LD XL,E
LD HL,0
CALL MOVE_FP.F_current
CALL MOVE_CP
POP DE
RET NC ; …᫨ à §¬¥à ä ©«  ­  ¤¨áª¥ <20>… áâ « ¡®«ìè¥, 祬 ¡ë«
; …᫨ à §¬¥à ä ©«  ­  ¤¨áª¥ áâ « ¡®«ìè¥, 祬 ¡ë«
LD L,(IY+_sFM.F_POSITION+0)
LD H,(IY+_sFM.F_POSITION+1)
LD C,(IY+_sFM.F_POSITION+2)
LD B,(IY+_sFM.F_POSITION+3)
LD (IY+_sFM.F_SIZE+0),L
LD (IY+_sFM.F_SIZE+1),H
LD (IY+_sFM.F_SIZE+2),C
LD (IY+_sFM.F_SIZE+3),B
AND A
RET
;
.WOV1: PUSH BC
PUSH HL
PUSH DE
LD IX,CORE_BUFFERS.BUFFER+#C000
LD B,1
IN A,(SLOT3)
PUSH AF
IN A,(SLOT0)
OUT (SLOT3),A
CALL BLOK_RD
POP BC
LD C,SLOT3
OUT (C),B
POP DE
POP HL
EXX
POP DE
JP C,PWERR1
LD HL,512 ;!HARDCODE
AND A
SBC HL,DE
LD B,H
LD C,L
POP HL
AND A
SBC HL,BC
JR NC,.WOV3
ADD HL,BC
LD B,H
LD C,L
LD HL,0
.WOV3: PUSH HL
LD HL,CORE_BUFFERS.BUFFER
ADD HL,DE
LD DE,(.R_POINT)
EX DE,HL
LDIR
LD (.R_POINT),HL
EXX
PUSH HL
PUSH DE
LD IX,CORE_BUFFERS.BUFFER+#C000
LD B,1
IN A,(SLOT3)
PUSH AF
IN A,(SLOT0)
OUT (SLOT3),A
CALL BLOK_WR
POP BC
LD C,SLOT3
OUT (C),B
POP HL
JP C,PWERR2
LD BC,1
ADD HL,BC
EX DE,HL
POP HL
LD C,B
ADC HL,BC
JP .WOV4
////////////// OLD ////////////////
; HL - CLUSTER
; HL:IX - SECTOR
; NSECTOR: DEC HL
; DEC HL
; EX DE,HL
; LD A,(CORE_BUFFERS.BootSector.S_P_C)
; LD B,A
; LD HL,0
; LD IX,0
; ADD_DE1: ADD IX,DE
; JR NC,ADD_DE2
; INC HL
; ADD_DE2: DJNZ ADD_DE1
; LD DE,(FatBuffer.DAT_FRM) ;first data sector
; ADD IX,DE
; LD DE,#0000
; ADC HL,DE
; RET
////////////// NEW //////////////////
; in: HL - CLUSTER
; out: HL:IX - SECTOR
NSECTOR: DEC HL
DEC HL
LD DE,0
LD A,(CORE_BUFFERS.BootSector.S_P_C)
XOR 1
JR Z,.skip
;
RRA
.loop: ADD HL,HL
RL E
; RL D
RRA
JP NC,.loop
;
.skip: EX DE,HL
LD XL,E
LD XH,D
LD DE,(FatBuffer.DAT_FRM) ;first data sector
XOR A
ADD IX,DE
LD D,A
LD E,A
ADC HL,DE
RET
/////////////////////////////////////
; HL:DE / C => DE:IX HL-OSTATOK (DE:BC.HL). ‹¥£ª® ¯¥à¥¤¥« âì ¯®¤ HL:DE / A => HL:DE.A
DIV_for_SPC:
LD A,C
DEC A
JR Z,.exit
;
AND E
LD B,A ; ®áâ â®ª
LD A,C
RRCA
;
.loop: SRL H : RR L
RR D : RR E
RRCA
JP NC,.loop
LD A,B
;
.exit: LD XH,D
LD XL,E
EX DE,HL
LD H,0
LD L,A
RET
; DIV32: LD A,#FF
; LD B,E
; .loop: SRL C
; JR C,.exitLoop
; SRL H : RR L : RR D : RR E : SLA A
; JP .loop
; .exitLoop:
; CPL
; AND B
; LD XH,D
; LD XL,E
; EX DE,HL
; LD H,0
; LD L,A
; RET
/*
DEFINE NEW_DIV 1
DIV32: LD XH,D
LD XL,E
IFN NEW_DIV
EX DE,HL
LD HL,0
LD A,#20
DIV001: ADD IX,IX
EX DE,HL
ADC HL,HL
EX DE,HL
ADC HL,HL
SBC HL,BC
JR NC,DIV002
ADD HL,BC
DEC A
JR NZ,DIV001
RET
DIV002: INC IX
DEC A
JR NZ,DIV001
RET
ELSE
div32_16:
;HLIX/BC -> HLIX remainder DE
;174+4*div32_16_sub8
;min: 2186cc
;max: 2794cc
;avg: 2466cc
;61 bytes
ex de,hl ; 4
; Negate BC to allow add instead of sbc
xor a ; 4
; Need to set HL to 0 anyways, so save 2cc and a byte
ld h,a ; 4
ld l,a ; 4
sub c ; 4
ld c,a ; 4
sbc a,a ; 4
sub b ; 4
ld b,a ; 4
ld a,d ; 4
call div32_16_sub8 ; 17
rla ; 4
ld d,a ; 4
ld a,e ; 4
call div32_16_sub8 ; 17
rla ; 4
ld e,a ; 4
ld a,ixh ; 8
call div32_16_sub8 ; 17
rla ; 4
ld ixh,a ; 8
ld a,ixl ; 8
call div32_16_sub8 ; 17
rla ; 4
ld ixl,a ; 8
;ex de,hl ; 4
ret ; 10
div32_16_sub8:
;119+8*div32_16_sub
;min: 503cc
;max: 655cc
;avg: 573cc
call 1F
1:
;17+2(17+2(div32_16_sub)))
call 1F
1:
;17+2(div32_16_sub)
call div32_16_sub
div32_16_sub:
;48+{8,0+{0,19}}
;min: 48cc
;max: 67cc
;avg: 56.75cc
rla ; 4
adc hl,hl ; 15
jr c,1F ;12/7
add hl,bc ; 11
ret c ;11/5
sbc hl,bc ; 15
ret ; 10
1:
add hl,bc ; 11
scf ; 4
ret ; 10
ENDIF
*/
;
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