A2osX/BIN/CSH.S.txt
2020-02-21 14:24:16 +01:00

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NEW
AUTO 3,1
.LIST OFF
.OP 65C02
.OR $2000
.TF bin/csh
*--------------------------------------
.INB INC/MACROS.I
.INB INC/A2OSX.I
.INB INC/MLI.I
.INB INC/MLI.E.I
*--------------------------------------
.INB USR/SRC/BIN/CSH.E
*--------------------------------------
* Zero Page Segment, up to 32 bytes
*--------------------------------------
.DUMMY
.OR ZPBIN
ZS.START
ZPFileBuf .BS 2
ZPFileBufPtr .BS 2
ZPFileBufPtrBak .BS 2
ZPCSHConst .BS 2
ZPCSHData .BS 2
ZPCSHStack .BS 2
ZPVarID .BS 2
ZPVarDef .EQ *
ZPVarType .BS 2
ZPVarSizeOf .BS 2
ZPVarDataPtr .BS 2
ZPhMacro .BS 1
ZPPtr1 .BS 2
ZPPtr2 .BS 2
ArgIndex .BS 1
ZPPtr3 .BS 2
ZS.END .ED
*--------------------------------------
* File Header (16 Bytes)
*--------------------------------------
CS.START cld
jmp (.1,x)
.DA #$61 6502,Level 1 (65c02)
.DA #1 BIN Layout Version 1
.DA #0 S.PS.F.EVENT
.DA #0
.DA CS.END-CS.START Code Size (without Constants)
.DA DS.END-DS.START Data SegmentSize
.DA #64 Stack Size
.DA #ZS.END-ZS.START Zero Page Size
.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1 .DA CS.INIT
.DA CS.RUN
.DA CS.DOEVENT
.DA CS.QUIT
L.MSG.GREETINGS .DA MSG.GREETINGS
L.MSG.USAGE .DA MSG.USAGE
L.MSG.ECHOCRLF .DA MSG.ECHOCRLF
L.MSG.DEBUG .DA MSG.DEBUG
L.MSG.ERR .DA MSG.ERR
L.MSG.DBGVAR .DA MSG.DBGVAR
.INB USR/SRC/BIN/CSH.R
.DA 0
*--------------------------------------
* Called once at process creation
* Put code for loading LIB here
*--------------------------------------
CS.INIT clc
CS.INIT.RTS rts
*--------------------------------------
* Called until exit with CS
* if RUN exits with CC, RN entered again
*--------------------------------------
CS.RUN >PUSHW L.MSG.GREETINGS
>PUSHB #K.VER
>PUSHB /K.VER
>PUSHBI 2
>SYSCALL printf
bcs CS.INIT.RTS
jsr CS.RUN.ARGS
bcs CS.INIT.RTS
jsr CSH.Init
bcs CS.INIT.RTS
.1 >SLEEP
>LDA.G bDebug
bpl .2
jsr PrintDebugMsg
.2 >LDA.G bTrace
bpl .3
>LDYA ZPFileBufPtr
jsr PrintTraceMsg
.3 jsr CSH.Run
bcc .1
cmp #MLI.E.EOF
beq .8
pha
jsr PrintErrMsg
pla
sec
rts
.8 lda #0 Exit Code = Success
sec
rts
*--------------------------------------
CS.RUN.ARGS inc ArgIndex
lda ArgIndex
>SYSCALL ARGV
bcs .7
>STYA ZPPtr1
lda (ZPPtr1)
cmp #'-'
bne .4
ldy #1
lda (ZPPtr1),y
ldx #OptionVars-OptionList-1
.1 cmp OptionList,x
beq .2
dex
bpl .1
bra .90
.2 ldy OptionVars,x
lda #$ff
sta (pData),y
bra CS.RUN.ARGS
.4 >LDA.G hFileBuf
bne .90
>PUSHW ZPPtr1
>PUSHBI O.RDONLY
>PUSHBI S.FI.T.TXT
>PUSHWZ Aux type
>SYSCALL LoadTxtFile
bcs .9
txa
>STA.G hFileBuf
>SYSCALL GetMemPtr
>STYA ZPFileBuf
>STYA ZPFileBufPtr
bra CS.RUN.ARGS
.7 >LDA.G hFileBuf
beq .90
clc
.9 rts
.90 >PUSHW L.MSG.USAGE
>PUSHBI 0
>SYSCALL printf
lda #E.SYN
sec QUIT Process
rts
*--------------------------------------
CS.DOEVENT sec
rts
*--------------------------------------
CS.QUIT jsr CSH.Quit
clc
rts
*--------------------------------------
PrintErrMsg lda ZPhMacro
beq .10
lda ZPFileBufPtrBak
sta ZPFileBufPtr
lda ZPFileBufPtrBak+1
sta ZPFileBufPtr+1
.10 >LDYA ZPFileBuf
>STYA ZPPtr1
stz ZPPtr2
stz ZPPtr2+1 Line counter
.1 inc ZPPtr2
bne .2
inc ZPPtr2+1
.2 >LDYA ZPPtr1
>STYA ZPPtr3 save line start
.20 lda (ZPPtr1)
beq .4 EoF
inc ZPPtr1
bne .3
inc ZPPtr1+1
.3 cmp #C.CR
bne .20 Scan until EoL
ldx ZPPtr1
cpx ZPFileBufPtr
lda ZPPtr1+1
sbc ZPFileBufPtr+1
bcc .1 not this line....
.4 >LDA.G bTrace
bmi .5
jsr PrintTraceMsg.3
.5 lda ZPPtr3
cmp ZPFileBufPtr
bne .6
lda ZPPtr3+1
cmp ZPFileBufPtr+1
beq .8
.6 >PUSHBI '-'
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fputc
inc ZPPtr3
bne .5
inc ZPPtr3+1
bra .5
.8 ldy #S.PS.hStdErr
lda (pPS),y
>PUSHA
>PUSHW L.MSG.ERR
>PUSHW ZPPtr2 Line counter
>PUSHBI 2
>SYSCALL fprintf
rts
*--------------------------------------
PrintDebugMsg >LDYA pStack
>STYA ZPPtr2
>PUSHW L.MSG.DEBUG
>PUSHW ZPPtr2
>PUSHBI 2
>SYSCALL printf
rts
*--------------------------------------
PrintTraceMsg >STYA ZPPtr3
PrintTraceMsg.3 >PUSHBI '>'
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fputc
ldy #$ff
.1 iny
lda (ZPPtr3),y
beq .8
cmp #C.CR
beq .8
phy
>PUSHA
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fputc
ply
bra .1
.8 ldy #S.PS.hStdErr
lda (pPS),y
>PUSHA
>PUSHW L.MSG.ECHOCRLF
>PUSHBI 0
>SYSCALL fprintf
rts
*--------------------------------------
.INB USR/SRC/BIN/CSH.S.CORE
.INB USR/SRC/BIN/CSH.S.EXEC
*--------------------------------------
CS.END
*--------------------------------------
* Initialized DATA
*--------------------------------------
MSG.Greetings .AZ "\r\nCSH-Shell %d.%d\r\n\r\n"
MSG.USAGE .AS "Usage : CSH <option> file\r\n"
.AS " -D : Debug Mode\r\n"
.AS " -T : Trace On"
MSG.ECHOCRLF .AZ "\r\n"
MSG.DEBUG .AZ "pStack=%H"
MSG.ERR .AZ "^\r\nLine #%D:"
MSG.DBGVAR .AZ "K=%H, T=%H, S=%H, P=%H, V=%L\r\n"
*--------------------------------------
OptionList .AS "DdTt"
OptionVars .DA #bDebug,#bDebug,#bTrace,#bTrace
*--------------------------------------
.INB USR/SRC/BIN/CSH.I
*--------------------------------------
.DUMMY
.OR 0
DS.START .INB USR/SRC/BIN/CSH.D
bDebug .BS 1
bTrace .BS 1
DS.END
.ED
*--------------------------------------
MAN
SAVE USR/SRC/BIN/CSH.S
ASM