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; LAST UPDATE: 18.10.2023 savelij
DG MACRO PAR
CALL PRN
DB PAR,0DH,0AH,0
ENDM
;
181893
FDC_DRV DW FD_RES
DW FD_SEEK
DW FD_FRM
DW FD_REC
DW FD_RD
DW FD_NOP
DW FD_WR
;-----------------------
;
FD
FD_TVL: LD HL,FD_TRKS
LD A,(IY+_DUS)
JP ADD_HL_A
;-----------------------
;
FD_ADR: LD (SV_SP),SP
FD_ADR1:
; CALL RET_ROM
LD C,(IY+_DUS)
XOR A
SUB (IX-_RQHEAD)
CPL
AND 10H
OR C
LD C,(IY+_DFMFM)
XOR C
AND 0BFH
XOR C
OR 0CH
OUT (0FFH),A
CALL FDREC1
CALL FD_TVL
LD A,(HL)
INC A
JR NZ,FD_SIT
CALL FR_SK1
JP NZ,ERR_PAS
LD A,1
FD_SIT: DEC A
OUT (3FH),A
FD_NOP: XOR A
RET
;-----------------------
;
FD_RES:
; CALL TST_RT
DI
; CALL RET_ROM
LD A,8
OUT (0FFH),A
; LD C,0
;$1:
LD B,0
DJNZ $
; DEC C
; JR NZ,$1
LD A,0CH
OUT (0FFH),A
LD A,0D0H
OUT (1FH),A
CALL FD_PAS
RET_OK: XOR A
EI
RET
; JP RET_RAM
;.COMMENT @
;-----------------------
; DELAY
;DELAY: LD B,50H
;DELAY1: PUSH AF
;DLP1: LD C,-1
;DLP2: DEC C
; JR NZ,DLP2
; DEC B
; JR NZ,DLP1
; POP AF
; RET
;@
FD_PAS: PUSH AF
CALL FD_TVL
LD (HL),0FFH
POP AF
RET
;-----------------------
; SEEK
FR_SEEK: LD A,(RQCYL)
FR_SK1: LD C,(IY+_DFSRHUT)
SET 3,C
OR A
LD (HL),A
JR Z,FR_HM
OUT (7FH),A
SET 4,C ; SEEK COMMAND
LD A,(RQCOM)
CP _FORMAT ; FORMAT
JR Z,FRS_D
SET 2,C ; 'VERIFY TRACK NUM' FLAG
JR FRS_D
FR_HM: DEC A
OUT (3FH),A
FRS_D: LD A,C
FR_SW1: OUT (1FH),A
JP FD_WAIT
FD_SEEK:CALL FD_ADR
LD A,(RQCYL)
CP (HL)
JR Z,RET_OK
FD_SKAL:EX AF,AF'
CALL FR_SEEK
JR Z,RET_OK
EX AF,AF'
OR A
JR Z,ERR_PAS
LD A,0C0H
LD HL,ED_BUF
LD BC,87FH
LD DE,0
DI ; READ TRACK NUMBER
OUT (1FH),A
CALL FD_RM
EI
IN A,(1FH)
AND 1CH
JR NZ,ATT3 ; IF ERROR - SKIP ATEMPT 2
LD A,(ED_BUF)
OUT (3FH),A ; ELSE - SET IT
CALL FR_SEEK ; ATEMPT 2
JR Z,RET_OK ; O'K
ATT3: XOR A
CALL FR_SK1 ; ATEMPT 3. HOME & SEEK
CALL FR_SEEK
JR NZ,ERR_PAS
JR RET_OK
;-----------------------
; CALCULATE TIMEOUT VALUE
EV_TOUT:LD A,(SYS_P)
LD B,4
AND 8
RET Z
SLA B
RET
;-----------------------
; WAIT FOR READY (WITH TIOME OUT CHECK)
FD_WDN: POP DE ; END OF WAIT
POP BC
IN A,(1FH)
BIT 4,A
RET
FD_WAIT:PUSH BC ; WAIT ITSELF
PUSH DE
CALL EV_TOUT
LD DE,0
FD_WL: IN A,(0FFH)
AND 80H
JR NZ,FD_WDN
DEC DE
LD A,D
OR E
JR NZ,FD_WL
DJNZ FD_WL
;---------------------------
; SOME ERRORS
; TIME OUT ERROR
T_OUT: LD A,_NRDY
DB 21H ; LD HL,...
; UNKNOWN ERROR
H_ERR: LD A,_HRDERR
; ANY ERROR
ERR_RET:LD HL,(SV_SP)
INC HL
INC HL
LD SP,HL
LD H,A
; CALL RET_ROM
LD A,0D0H
OUT (1FH),A
LD A,H
OR A
RET
; JP RET_RAM
; ERROR & PASSIVATE
ERR_PAS:CALL FD_PAS
JR H_ERR
;-----------------------
; COMMON PART FOR READ/WRITE PROC'S
FD_RW: LD (SV_SP),SP
CALL FD_ADR1
IN A,(1FH)
AND 20H ; HEAD LOADED?
JR NZ,FD_RWL ; YES - JUMP
LD A,(HL) ; CURRENT TRACK
OUT (7FH),A ; SEEK IT
LD A,(IY+_DFSRHUT)
OR 18H ; SEEK WITH 15MS DELAY COMMAND
CALL FR_SW1 ; SEEK & WAIT
JR NZ,ERR_PAS ; RET IF ERROR
FD_RWL: LD A,(RQSECT)
INC A
OUT (5FH),A
CALL EV_TOUT
XOR A
SUB (IX-_RQHEAD)
AND 8
LD HL,(DCBUF)
LD C,7FH
LD DE,0
EXX
RET
;-----------------------
; COMMAND 'READ'
FD_RM: IN A,(0FFH) ; READ LOOP
AND 0C0H
JP M,TRY_ERR
JR NZ,FD_R1
DEC DE
LD A,D
OR E
JR NZ,FD_RM
DJNZ FD_RM
JP T_OUT
FD_R: IN A,(0FFH)
AND 0C0H
JR Z,FD_R
RET M
FD_R1: INI
JR FD_R
FD_RD: CALL FD_RW ; 'READ' COMMAND ITSELF
LD C,1CH
EXX
OR 80H
DI
OUT (1FH),A
CALL FD_RM
;-----------------------
; TEST FOR R/W ERROR
RW_ERR_:IN A,(1FH)
EXX
AND C
RW_ERR1:EI
RET Z
; JP Z,RET_RAM
LD C,A
ERR_R: BIT 4,C
JR NZ,TRY_SK
; CALL RET_RAM
BIT 3,C
LD A,_CRC_ERR
RET NZ
BIT 2,C
LD A,_OVERRUN
RET NZ
BIT 5,C
LD A,_IOERR
RET NZ
BIT 6,C
LD A,_WR_PROT
RET NZ
LD A,_FATAL_ERROR
OR A
RET
;--- IF 'NO ADDR MARK' ERROR - TRY TO SEEK
TRY_SK: CALL FD_TVL
LD A,(RQCYL)
CALL FD_SKAL
LD A,_NO_DATA
OR A
RET
;--- IF NO ERROR & NO DATA - ERROR TOO
TRY_ERR:IN A,(1FH)
EXX
AND C
JP Z,H_ERR
POP BC
JR RW_ERR1
;-----------------------
; COMMAND 'WRITE'
FD_WR: CALL FD_RW
LD C,7CH
EXX
OR 0A0H
DI
OUT (1FH),A
CALL FD_WM
JR RW_ERR_
FD_WM: IN A,(0FFH) ; WRITE LOOP
AND 0C0H
JP M,TRY_ERR
JR NZ,FD_W1
DEC DE
LD A,D
OR E
JR NZ,FD_WM
DJNZ FD_WM
JP T_OUT
FD_W: IN A,(0FFH)
AND 0C0H
JR Z,FD_W
RET M
FD_W1: OUTI
JR FD_W
;-----------------------
; RECALIBRATE SUBROUTINES
FD_REC: CALL FD_ADR
XOR A
CALL FR_SK1
JP NZ,H_ERR
XOR A
RET
; JP RET_RAM
FD_SK: OUT (7FH),A
LD B,A
LD A,C
OR 18H
OUT (1FH),A
CALL FD_WAIT
LD E,A
SCF
RET NZ
IN A,(3FH)
CP B
RET
FDREC1: BIT 7,(IY+_DCYLN)
CALL NZ,REC_TR
BIT 7,(IY+_DFSRHUT)
CALL NZ,REC_TM
RET
REC_TR: LD A,0FH
OUT (1FH),A
CALL FD_WAIT
JP NZ,H_ERR
LD D,80
LD C,13H
LD A,79
CALL FD_SK
JP C,ERR_PAS
JR NZ,TR40
LD A,1
CALL FD_SK
JP C,ERR_PAS
JR Z,TR80
TR40: LD D,40
TR80: BIT 1,(IY+_DHEADR)
LD (IY+_DCYLN),D
LD A,D
JR Z,$+3
ADD A,A
LD (IY+_DTRACK),A
RET
REC_TM: LD C,0FFH
FD_SLOW: INC C
BIT 2,C
JP NZ,H_ERR
LD A,C
OR 8
OUT (1FH),A ; HOME
CALL FD_WAIT
JR NZ,FD_SLOW
LD A,20
CALL FD_SK ; SEEK 20 TRACK
JR NZ,FD_SLOW
LD A,1
CALL FD_SK ; SEEK 1 TRACK
JR NZ,FD_SLOW
BIT 2,E
JR NZ,FD_SLOW
LD A,C
OR 38H
OUT (1FH),A ; STEP -1
CALL FD_WAIT
JR NZ,FD_SLOW
BIT 2,A ; IS 0 TRACK ?
JP Z,FD_SLOW ; IF NOT - SLOW
LD (IY+_DFSRHUT),C
RET
;-------------------------------------
; FORMAT
OUT_R1: LD A,C
JR OUT_R
OUT_1: LD B,1
OUT_R: EX AF,AF'
_O_W: IN A,(0FFH)
AND 0C0H
JR Z,_O_W
RET M
EX AF,AF'
OUT (7FH),A
DJNZ OUT_R
RET
_FRM_TR: LD A,(IY+_DFN) ; SECTOR SIZE
LD C,A ; C - COUNTER
OR A ; CONVERT (0,1,2,3) -> (1,1,2,4)
JP PO,$+4
INC C
LD B,0 ; B - SIZE OF FIRST BLOCK FORMAT
SUB 1 ; FILLER (0,1,2,3) -> (128,256,256,256)
RR B
PUSH BC ; SAVE FOR LATE USE
LD DE,ED_BUF ; INTERLIVE TABLE
LD A,0F4H
DI
OUT (1FH),A
LD A,04EH
LD B,(IY+_DFGPF) ; GAP3 X 4E
CALL OUT_R
LD BC,0C00H
CALL OUT_R1
LD BC,3F6H
CALL OUT_R1
LD A,0FCH
CALL OUT_1
FR_LP: LD BC,324EH
CALL OUT_R1
LD BC,0C00H
CALL OUT_R1
LD BC,3F5H
CALL OUT_R1
LD A,0FEH
CALL OUT_1
LD A,(RQCYL) ; TRACK
CALL OUT_1
LD A,(RQHEAD) ; SIDE
CALL OUT_1
LD A,(DE) ; SECTOR
INC DE
CALL OUT_1
LD A,(IY+_DFN) ; SECTOR SIZE
CALL OUT_1
LD A,0F7H
CALL OUT_1
LD BC,164EH
CALL OUT_R1
LD BC,0C00H
CALL OUT_R1
LD BC,3F5H
CALL OUT_R1
LD A,0FBH
CALL OUT_1
LD A,(RQBLN)
POP BC
PUSH BC
FR_L1: CALL OUT_R
DEC C
JR NZ,FR_L1
LD A,0F7H
CALL OUT_1
POP HL
RET M
PUSH HL
LD A,(DE)
OR A
JR NZ,FR_LP
POP HL
LD C,5
FR_L2: DEC C
RET M
LD A,4EH
CALL OUT_R
JP P,FR_L2
XOR A
RET
FD_FRM LD A,(SYS_P)
LD (TMP_W),A
RES 3,(IX-_SYS_P)
CALL SET_SYS
CALL FD_ADR
CALL FR_SEEK
LD A,_HRDERR
RET NZ
LD A,(RQBADR)
CALL FR_FIL
LD B,8
DI
FRM_1: PUSH BC
CALL _FRM_TR
POP BC
IN A,(1FH)
LD C,A
JP P,FR_OK
BIT 0,C
JR Z,F_SH1
LD A,0D0H
OUT (1FH),A
F_SH1: BIT 6,C
JP NZ,ERR_R
WER_FL: DJNZ FRM_1
JP ERR_R
FR_OK: LD DE,ED_BUF+1
WER_LP: LD A,(DE)
OR A
JR NZ,$+3
INC A
OUT (5FH),A
LD A,80H
OUT (1FH),A
WER_WT: IN A,(0FFH)
AND 0C0H
JR Z,WER_WT
IN A,(1FH)
AND 18H
LD C,A
LD A,0D0H
OUT (1FH),A
JR NZ,WER_FL
LD A,(DE)
INC DE
OR A
JR NZ,WER_LP
LD A,(TMP_W)
LD (SYS_P),A
CALL SET_SYS
JP RET_OK
FR_FIL: LD HL,ED_BUF ; A - INTERLIVE FACTOR
LD DE,ED_BUF+1
LD C,(IY+_DSECTT)
LD B,0
LD (HL),0
LDIR
LD HL,ED_BUF
LD C,A
LD B,(IY+_DSECTT)
LD D,1
JR FF_LP
FF_2: PUSH BC
LD C,1
CALL FF_MOV
POP BC
FF_LP: LD A,(HL)
OR A
JR NZ,FF_2
LD (HL),D
INC D
PUSH BC
CALL FF_MOV
POP BC
DJNZ FF_LP
RET
FF_MOV: PUSH DE
LD B,0
ADD HL,BC
LD C,(IY+_DSECTT)
EX DE,HL
LD HL,ED_BUF
ADD HL,BC
DEC HL
SBC HL,DE
EX DE,HL
JR NC,FF_R1
OR A
SBC HL,BC
FF_R1: POP DE
RET
;.COMMENT @
;!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1
;_PRN_M: LD A,(HL)
; OR A
; INC HL
; RET Z
; CALL CONOUT
; JR _PRN_M
;PRN: EX (SP),HL
; PUSH AF
; CALL _PRN_M
; POP AF
; EX (SP),HL
; JP RET_ROM
;PHEX:
; PUSH AF
; RRCA
; RRCA
; RRCA
; RRCA
; CALL DHEX
; POP AF
; CALL DHEX
; LD A,":"
; JP CONOUT
;
; TYPE ONE HEX DIGIT
;
;DHEX: AND 0FH
; ADD A,90H
; DAA
; ADC A,40H
; DAA
; JP CONOUT