A2osX/BIN/CSH.S.txt
2019-02-13 16:20:44 +00:00

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NEW
PREFIX
AUTO 4,1 Enable MASM3 auto line num
.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
.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
ZPPtr1 .BS 2
ZPPtr2 .BS 2
ZPPtr3 .BS 2
ZPFileBuf .BS 2
ZPFileBufPtr .BS 2
ZPFnDefPtr .BS 2
ZPCSHSymbols .BS 2
ZPCSHConst .BS 2
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
.DA #16 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.ECHOCRLF .DA MSG.ECHOCRLF
L.MSG.ERR .DA MSG.ERR
.INB USR/SRC/BIN/CSH.R
.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
*--------------------------------------
CS.RUN >PUSHWI K.VER
>PUSHBI 2
>LDYA L.MSG.GREETINGS
>SYSCALL printf
bcs .99
jsr CSH.Init
bcs .99
ldy #S.PS.ARGC
lda (pPS),y
beq .90 no arg, usage
>PUSHWI 0 Aux type
>PUSHBI S.FI.T.TXT
>PUSHBI O.RDONLY
lda #1
>SYSCALL ArgV
>SYSCALL LoadTxtFile
bcs .99
txa
>STA.G hFileBuf
>SYSCALL GetMemPtr
>STYA ZPFileBuf
>STYA ZPFileBufPtr
.1 >SLEEP
jsr CSH.Run
bcc .1
cmp #MLI.E.EOF
beq .8
pha
jsr PrintErrMsg
pla
sec
rts
.8 lda #0
sec
rts
.90 lda #E.SYN Exit Code = Succes
sec QUIT Process
.99 rts
*--------------------------------------
* 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
*--------------------------------------
CS.QUIT jsr CSH.Quit
clc
rts
*--------------------------------------
PrintErrMsg >LDYA ZPFileBuf
>STYA ZPPtr1
lda #1
sta ZPPtr3
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....
ldy #$ff
.5 iny
lda (ZPPtr2),y
beq .6
cmp #C.CR
beq .6
phy
>PUSHA
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fputc
ply
bra .5
.6 phy
>PUSHBI 0
>PUSHW L.MSG.ECHOCRLF
ldy #S.PS.hStdErr
lda (pPS),y
>SYSCALL fprintf
ply
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
*--------------------------------------
.INB USR/SRC/BIN/CSH.S.CORE
*--------------------------------------
CS.END
*--------------------------------------
* Initialized DATA
*--------------------------------------
MSG.Greetings .AZ "\r\nCSH-Shell %d.%d\r\n\r\n"
MSG.ECHOCRLF .AZ "\r\n"
MSG.ERR .AZ "^\r\nLine #%D:"
.INB USR/SRC/BIN/CSH.I
*--------------------------------------
.DUMMY
.OR 0
DS.START .INB USR/SRC/BIN/CSH.D
DS.END
.ED
*--------------------------------------
MAN
SAVE USR/SRC/BIN/CSH.S
ASM