A2osX/BIN/CSH.S.txt

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NEW
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AUTO 3,1
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.LIST OFF
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.OP 65C02
.OR $2000
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.TF BIN/CSH
*--------------------------------------
.INB INC/MACROS.I
.INB INC/A2OSX.I
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.INB INC/MLI.I
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.INB INC/MLI.E.I
*--------------------------------------
.INB USR/SRC/BIN/CSH.E
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*--------------------------------------
* Zero Page Segment, up to 32 bytes
*--------------------------------------
.DUMMY
.OR ZPBIN
ZS.START
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ZPFileBuf .BS 2
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ZPFileBufPtr .BS 2
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ZPFileBufPtrBak .BS 2
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ZPCSHConst .BS 2
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ZPCSHStack .BS 2
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ZPPtr1 .BS 2
ZPPtr2 .BS 2
ZPPtr3 .BS 2
ZPVarID .BS 2
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ZPVarData .BS 6
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ZPVarType .BS 1
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ZPhMacro .BS 1
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ArgIndex .BS 1
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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
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.DA #64 Stack Size
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.DA #ZS.END-ZS.START Zero Page Size
.DA 0
*--------------------------------------
* Relocation Table
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*--------------------------------------
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.1 .DA CS.INIT
.DA CS.RUN
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.DA CS.DOEVENT
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.DA CS.QUIT
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L.MSG.GREETINGS .DA MSG.GREETINGS
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L.MSG.USAGE .DA MSG.USAGE
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L.MSG.ECHOCRLF .DA MSG.ECHOCRLF
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L.MSG.DEBUG .DA MSG.DEBUG
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L.MSG.ERR .DA MSG.ERR
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.INB USR/SRC/BIN/CSH.R
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.DA 0
*--------------------------------------
* Called once at process creation
* Put code for loading LIB here
*--------------------------------------
CS.INIT clc
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CS.INIT.RTS rts
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*--------------------------------------
* Called until exit with CS
* if RUN exits with CC, RN entered again
*--------------------------------------
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CS.RUN >PUSHW L.MSG.GREETINGS
>PUSHWI K.VER
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>PUSHBI 2
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>SYSCALL printf2
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bcs CS.INIT.RTS
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jsr CS.RUN.ARGS
bcs CS.INIT.RTS
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jsr CSH.Init
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bcs CS.INIT.RTS
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.1 >SLEEP
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>LDA.G bDebug
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bpl .2
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jsr PrintDebugMsg
.2 >LDA.G bTrace
bpl .3
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>LDYA ZPFileBufPtr
jsr PrintTraceMsg
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.3 jsr CSH.Run
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bcc .1
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cmp #MLI.E.EOF
beq .8
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pha
jsr PrintErrMsg
pla
sec
rts
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.8 lda #0 Exit Code = Success
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sec
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rts
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*--------------------------------------
CS.RUN.ARGS inc ArgIndex
lda ArgIndex
>SYSCALL ARGV
bcs .7
>STYA ZPPtr1
lda (ZPPtr1)
cmp #'-'
bne .4
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ldy #1
lda (ZPPtr1),y
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ldx #OptionVars-OptionList-1
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.1 cmp OptionList,x
beq .2
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dex
bpl .1
bra .90
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.2 ldy OptionVars,x
lda #$ff
sta (pData),y
bra CS.RUN.ARGS
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.4 >LDA.G hFileBuf
bne .90
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>PUSHWZ Aux type
>PUSHBI S.FI.T.TXT
>PUSHBI O.RDONLY
>LDYA ZPPtr1
>SYSCALL LoadTxtFile
bcs .9
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txa
>STA.G hFileBuf
>SYSCALL GetMemPtr
>STYA ZPFileBuf
>STYA ZPFileBufPtr
bra CS.RUN.ARGS
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.7 >LDA.G hFileBuf
beq .90
clc
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.9 rts
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.90 >PUSHW L.MSG.USAGE
>PUSHBI 0
>SYSCALL printf2
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lda #E.SYN
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sec QUIT Process
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rts
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*--------------------------------------
CS.DOEVENT sec
rts
*--------------------------------------
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CS.QUIT jsr CSH.Quit
clc
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rts
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*--------------------------------------
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PrintErrMsg lda ZPhMacro
beq .10
lda ZPFileBufPtrBak
sta ZPFileBufPtr
lda ZPFileBufPtrBak+1
sta ZPFileBufPtr+1
.10 >LDYA ZPFileBuf
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>STYA ZPPtr1
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stz ZPPtr2
stz ZPPtr2+1 Line counter
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.1 inc ZPPtr2
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bne .2
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inc ZPPtr2+1
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.2 >LDYA ZPPtr1
>STYA ZPPtr3 save line start
.20 lda (ZPPtr1)
beq .4 EoF
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inc ZPPtr1
bne .3
inc ZPPtr1+1
.3 cmp #C.CR
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bne .20 Scan until EoL
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ldx ZPPtr1
cpx ZPFileBufPtr
lda ZPPtr1+1
sbc ZPFileBufPtr+1
bcc .1 not this line....
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.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 '-'
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ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fputc
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inc ZPPtr3
bne .5
inc ZPPtr3+1
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bra .5
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.8 >PUSHW ZPPtr2 Line counter
>PUSHBI 2
>PUSHW L.MSG.ERR
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ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fprintf
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rts
*--------------------------------------
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PrintDebugMsg >PUSHW L.MSG.DEBUG
>PUSHW pStack
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>PUSHBI 2
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>SYSCALL printf2
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rts
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*--------------------------------------
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PrintTraceMsg >STYA ZPPtr3
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PrintTraceMsg.3 >PUSHBI '>'
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ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fputc
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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 >PUSHBI 0
>PUSHW L.MSG.ECHOCRLF
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ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fprintf
rts
*--------------------------------------
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.INB USR/SRC/BIN/CSH.S.CORE
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.INB USR/SRC/BIN/CSH.S.EXEC
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*--------------------------------------
CS.END
*--------------------------------------
* Initialized DATA
*--------------------------------------
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MSG.Greetings .AZ "\r\nCSH-Shell %d.%d\r\n\r\n"
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MSG.USAGE .AS "Usage : CSH <option> file\r\n"
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.AS " -D : Debug Mode\r\n"
.AS " -T : Trace On"
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MSG.ECHOCRLF .AZ "\r\n"
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MSG.DEBUG .AZ "pStack=%H"
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MSG.ERR .AZ "^\r\nLine #%D:"
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*--------------------------------------
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OptionList .AS "DdTt"
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OptionVars .DA #bDebug,#bDebug,#bTrace,#bTrace
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*--------------------------------------
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.INB USR/SRC/BIN/CSH.I
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*--------------------------------------
.DUMMY
.OR 0
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DS.START .INB USR/SRC/BIN/CSH.D
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bDebug .BS 1
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bTrace .BS 1
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DS.END
.ED
*--------------------------------------
MAN
SAVE USR/SRC/BIN/CSH.S
ASM