A2osX/BIN/CSH.S.txt

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NEW
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AUTO 3,1 Enable MASM3 auto line num
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.LIST OFF
.OP 65C02 Target CPU, must match CPU level in header
.OR $2000 usualy $2000, but any value > $100 allowed
.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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ZPPtr1 .BS 2
ZPPtr2 .BS 2
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ZPPtr3 .BS 2
ZPFileBuf .BS 2
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ZPFileBufPtr .BS 2
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ZPFnDefPtr .BS 2
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ZPCSHSymbols .BS 2
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ZPCSHConst .BS 2
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ZPCSHData .BS 2
ZPCSHValue .BS 2
ZPCSHStack .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
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.DA #64 Stack Size
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.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
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L.MSG.GREETINGS .DA MSG.GREETINGS
L.MSG.ECHOCRLF .DA MSG.ECHOCRLF
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
rts
*--------------------------------------
* Called until exit with CS
* if RUN exits with CC, RN entered again
*--------------------------------------
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CS.RUN >PUSHWI K.VER
>PUSHBI 2
>LDYA L.MSG.GREETINGS
>SYSCALL printf
bcs .99
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jsr CSH.Init
bcs .99
ldy #S.PS.ARGC
lda (pPS),y
beq .90 no arg, usage
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>PUSHWZ Aux type
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>PUSHBI S.FI.T.TXT
>PUSHBI O.RDONLY
lda #1
>SYSCALL ArgV
>SYSCALL LoadTxtFile
bcs .99
txa
>STA.G hFileBuf
>SYSCALL GetMemPtr
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>STYA ZPFileBuf
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>STYA ZPFileBufPtr
.1 >SLEEP
jsr CSH.Run
bcc .1
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cmp #MLI.E.EOF
beq .8
pha
jsr PrintErrMsg
pla
sec
rts
.8 lda #0
sec
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rts
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.90 lda #E.SYN Exit Code = Succes
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sec QUIT Process
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.99 rts
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*--------------------------------------
* Called if option S.PS.F.EVENT enabled in Header
* Timer Event : every 10th seconds
*--------------------------------------
CS.DOEVENT sec
rts
*--------------------------------------
* Called once, when RUN exited with CS
* Put code for unloading LIB here
*--------------------------------------
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CS.QUIT jsr CSH.Quit
clc
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rts
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*--------------------------------------
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PrintErrMsg >LDYA ZPFileBuf
>STYA ZPPtr1
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lda #1
sta ZPPtr3
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stz ZPPtr3+1
.1 >LDYA ZPPtr1
>STYA ZPPtr2 Save actual line start
inc ZPPtr3
bne .2
inc ZPPtr3+1
.2 lda (ZPPtr1)
beq .6 EoF
inc ZPPtr1
bne .3
inc ZPPtr1+1
.3 cmp #C.CR
bne .2 Scan until EoL
ldx ZPPtr1
cpx ZPFileBufPtr
lda ZPPtr1+1
sbc ZPFileBufPtr+1
bcc .1 not this line....
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ldy #$ff
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.5 iny
lda (ZPPtr2),y
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beq .6
cmp #C.CR
beq .6
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phy
>PUSHA
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fputc
ply
bra .5
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.6 phy
>PUSHBI 0
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>PUSHW L.MSG.ECHOCRLF
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fprintf
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ply
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beq .8
.7 phy
>PUSHBI '-'
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fputc
ply
dey
bne .7
.8 >PUSHW ZPPtr3
>PUSHBI 2
>PUSHW L.MSG.ERR
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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*--------------------------------------
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.ECHOCRLF .AZ "\r\n"
MSG.ERR .AZ "^\r\nLine #%D:"
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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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DS.END
.ED
*--------------------------------------
MAN
SAVE USR/SRC/BIN/CSH.S
ASM