A2osX/BIN/ASM.S.SRC.txt

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PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
.LIST OFF
*---------------------------------------
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SRC.PrintLine ldy #ASM.MACRO.ON
lda (pData),y
bpl .1
ldy #ASM.LI.CON
lda (pData),y
bpl .9
bmi .8
.1 ldy #ASM.LI.ON
lda (pData),y
bpl .9
.8 >PUSHWI UsrBuf256
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>PUSHW SRC.LINENUM
ldy #ASM.PC+1
>PUSHB (pData),y
dey
>PUSHB (pData),y
>LDYA L.MSG.SRCLINE
>SYSCALL PrintFYA
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.9 rts
*---------------------------------------
SRC.PrintLineErr ldx #0
.1 lda UsrBuf256,x
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beq .2
phx
>SYSCALL COutA
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plx
inx
bcc .1
rts
.2 lda #13
>SYSCALL COutA
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bcs .9
ldx #0
.3 lda UsrBuf256,x
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beq .5
inx
cpx SRC.BufPtr
beq .4
phx
lda #'-'
>SYSCALL COutA
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plx
bcs .9
bra .3
.4 lda #'^'
phx
>SYSCALL COutA
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plx
bcs .9
.5 lda #13
>SYSCALL COutA
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.9 rts
*---------------------------------------
SRC.ParseLine ldx UsrBuf256
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beq .1
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cpx #'*' Comment?
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beq .1
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cpx #';' Comment?
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beq .1
ldy #ASM.DO.ON
lda (pData),y
bne .1
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stz SRC.GLabel.New
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cpx #' ' no label...go scan dir/opcode
beq .4
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cpx #'.' local symbol?
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bne .2
jsr SRC.ParseLine.SymL
bra .3
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.1 clc
rts
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.2 jsr SRC.ParseLine.SymG
.3 bcs SRC.ParseLine.Err
.4 jsr SRC.GetCharNB Scan for an Opcode...
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beq SRC.ParseLine.Ok
cmp #'.'
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bne .5
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jsr SRC.ParseLine.Dir
bcs SRC.ParseLine.Err
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bra SRC.ParseLine.Ok
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.5 cmp #'>'
bne .6
jsr SRC.ParseLine.Exec.Macro
bcs SRC.ParseLine.Err
bra SRC.ParseLine.Ok
.6 dec SRC.BufPtr Back one char...
jsr SRC.ParseLine.OpCode
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bcs SRC.ParseLine.Err
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SRC.ParseLine.Ok lda SRC.GLabel.New
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bpl .8
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ldy #ASM.PASS
lda (pData),y pass#2?
bne .8 yes, nothing to do
* --- Pass #1
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>LDYA L.SRC.GLabel.Flags
jsr SYM.SearchGlobal
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bcs .1 if CS, not found, add
lda SRC.FLabel.Flags
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bit #$40 found symbol pending ?
bne .2 yes, update
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bit #$1 found is .SE ?
beq SRC.ParseLine.Redef no, redefine error
.2 ldx #0 update current symbol with
.3 lda SRC.GLabel.Flags flags & value
jsr SYM.AddByteGBlock
inx
cpx #5
bne .3
bra .8
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.1 >LDYA L.SRC.GLabel.Flags
jsr SYM.AddGToGBlockYA
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bcs SRC.ParseLine.Err
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.8 clc
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rts
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SRC.ParseLine.Inv lda #ERR.INVALID.LABEL
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SRC.ParseLine.Err sec
rts
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SRC.ParseLine.Redef lda #ERR.SYMBOL.REDEFINE
sec
rts
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*---------------------------------------
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SRC.ParseLine.SymP jsr SRC.GetChar
beq SRC.ParseLine.SymE
jsr SRC.GetDecimal
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bcs SRC.ParseLine.SymE
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jmp SYM.AddPrivate
*---------------------------------------
SRC.ParseLine.SymL jsr SRC.GetChar
beq SRC.ParseLine.SymE
jsr SRC.GetDecimal
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bcs SRC.ParseLine.SymE
lda SRC.ACC+1
ora SRC.ACC+2
ora SRC.ACC+3
bne SRC.ParseLine.SymE Max .255
lda SRC.ACC
beq SRC.ParseLine.SymE .0 is not allowed
sta SRC.LLabel.ID
ldy #ASM.PC
lda (pData),y
ldy #ASM.PC.GLABEL
sec
sbc (pData),y
sta SRC.LLabel.Offset
ldy #ASM.PC+1
lda (pData),y
ldy #ASM.PC.GLABEL+1
sbc (pData),y
bne SRC.ParseLine.SymR
ldy #ASM.PC+2
lda (pData),y
ldy #ASM.PC.GLABEL+2
sbc (pData),y
bne SRC.ParseLine.SymR
ldy #ASM.PC+3
lda (pData),y
ldy #ASM.PC.GLABEL+3
sbc (pData),y
bne SRC.ParseLine.SymR
bcc SRC.ParseLine.SymR
jmp SYM.AddLToGBlock
*---------------------------------------
SRC.ParseLine.SymE lda #ERR.INVALID.LABEL
sec
rts
SRC.ParseLine.SymR lda #ERR.RANGE
sec
rts
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*---------------------------------------
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SRC.ParseLine.SymG >LDYA L.SRC.GLabel.Len
jsr SRC.GetLabel
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bcs SRC.ParseLine.SymE
ldx #3 Makes Current Label = PC for now
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ldy #ASM.PC+3
.1 lda (pData),y
sta SRC.GLabel.Value,x
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dey
dex
bpl .1
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ldx #3 Makes Current Label = Ref for next local
ldy #ASM.PC.GLABEL+3
.2 lda SRC.GLabel.Value,x
sta (pData),y
dey
dex
bpl .2
lda #$80 Mark GLabel Flag...
sta SRC.GLabel.Flags
sta SRC.GLabel.New
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clc
rts
*---------------------------------------
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SRC.ParseLine.Dir >LDYA L.T.DIRECTIVES
jsr SRC.GetKeyword
bcs .9
jmp (J.DIRECTIVES,x)
.9 lda #ERR.INVALID.DIRECTIVE
sec
rts
*---------------------------------------
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SRC.ParseLine.Exec.Macro
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clc
rts
*---------------------------------------
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SRC.ParseLine.Add.Macro
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clc
rts
*---------------------------------------
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SRC.ParseLine.OpCode
jsr SRC.GetArg
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bcc .11
rts
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.11 ldy #ASM.T.hMem
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lda (pData),y
>SYSCALL GetMemPtrA
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>STYA ZPPtr1
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ldy #ASM.T.O setup Ptr to Opcodes
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lda (ZPPtr1),y
clc
adc ZPPtr1
sta ZPPtr2
iny
lda (ZPPtr1),y
adc ZPPtr1+1
sta ZPPtr2+1
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ldy #ASM.T.R setup Ptr to Registers
lda (ZPPtr1),y
clc
adc ZPPtr1
sta ZPPtr3
iny
lda (ZPPtr1),y
adc ZPPtr1+1
sta ZPPtr3+1
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.10 lda (ZPPtr2)
ldy #1
ora (ZPPtr2),y
beq .9
ldx #$FF
.1 inx
lda SRC.Buffer,x
iny
cmp (ZPPtr2),y
bne .7
cpx SRC.Buffer
bne .1
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jsr SRC.ParseLine.AM
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bcs .99
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bcc .20
ldx SRC.AM.StrBuf
beq .20
ldx #0
.21 inx
lda SRC.AM.StrBuf,x
phx
>SYSCALL COutA
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plx
cpx SRC.AM.StrBuf
bne .21
lda #13
>SYSCALL COutA
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.20 ldy #ASM.PC
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lda (pData),y
inc
sta (pData),y
bne .2
iny
lda (pData),y
inc
sta (pData),y
.2 clc
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rts
.7 lda ZPPtr1
clc
adc (ZPPtr2)
tax
lda ZPPtr1+1
ldy #1
adc (ZPPtr2),y
stx ZPPtr2
sta ZPPtr2+1
bra .10
.9 lda #ERR.INVALID.OPCODE
sec
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.99 rts
*---------------------------------------
SRC.ParseLine.AM stz SRC.AM.ID
stz SRC.AM.StrBuf
.1 jsr SRC.GetCharUC any arg immediately after ' '?
beq .8 no, AM.ID=0 (implied)
cmp #' ' another space ?
beq .8 ignore end of line (comment)
jsr SRC.IsAMReserved
bcs .2
inc SRC.AM.StrBuf
ldx SRC.AM.StrBuf
sta SRC.AM.StrBuf,x
bra .1
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.8 clc
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rts
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.2 jsr SRC.IsMODReserved
bcs .21
lda #'#'
inc SRC.AM.StrBuf
ldx SRC.AM.StrBuf
sta SRC.AM.StrBuf,x
bra .1
.21 jsr SRC.IsLetter Any register?
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bcs .70 no, try something else
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ldx SRC.BufPtr
stx SRC.BufPtrSave
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stz SRC.AM.tmpBuf
sta SRC.AM.tmpBuf+1
inc SRC.AM.tmpBuf
.3 jsr SRC.GetCharUC
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beq .41
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jsr SRC.IsLetterOrDigit
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bcs .4
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inc SRC.AM.tmpBuf
ldx SRC.AM.tmpBuf
sta SRC.AM.tmpBuf,x
bra .3
.4 dec SRC.BufPtr back one char
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.41 ldy #0
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.5 lda (ZPPtr3),y
beq .71 last register ?
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phy
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ldx #$ff
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.6 lda (ZPPtr3),y
iny
inx
cmp SRC.AM.tmpBuf,x
bne .7
cpx SRC.AM.tmpBuf
bne .6
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ply
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ldy #0 register match, add to AM string
ldx SRC.AM.StrBuf
.61 iny
lda SRC.AM.tmpBuf,y
inx
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sta SRC.AM.StrBuf,x
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cpy SRC.AM.tmpBuf
bne .61
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stx SRC.AM.StrBuf
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jmp .1
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.7 ply
tya
sec
adc (ZPPtr3),y
tay
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bra .5
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.71 lda SRC.BufPtrSave Does not match a register,restore Ptr
sta SRC.BufPtr
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.70 dec SRC.BufPtr back one char
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jsr EXP.Eval
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bcs .99
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ldx #3
.73 lda SRC.ACC,x
bne .72
dex
bne .73
.72 inx
txa
ora #$30
inc SRC.AM.StrBuf
ldx SRC.AM.StrBuf
sta SRC.AM.StrBuf,x
jmp .1
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clc
rts
.9 lda #ERR.INVALID.AM.SYN
sec
.99 rts
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*---------------------------------------
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SRC.GetDecimal stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.GetChar
beq .99
jsr SRC.IsDigit10
bcs .99
and #$0F
sta SRC.ACC
.1 jsr SRC.GetChar
beq .8
cmp #' '
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beq .88
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jsr SRC.IsEXPReserved
bcc .88
jsr SRC.IsAMReserved
bcc .88
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jsr SRC.IsDigit10
bcs .99
and #$0F
pha
jsr SRC.ACC10
pla
bcs .9
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adc SRC.ACC
sta SRC.ACC
bcc .1
inc SRC.ACC+1
bne .1
inc SRC.ACC+2
bne .1
inc SRC.ACC+3
bne .1
.9 lda #ERR.VAL.TOO.BIG
sec
rts
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.88 dec SRC.BufPtr Back One Char
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.8 clc
rts
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.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetHex stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.GetChar
beq .99
jsr SRC.IsDigit16
bcs .99
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sta SRC.ACC
.1 jsr SRC.GetChar
beq .8
cmp #' '
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beq .88
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jsr SRC.IsEXPReserved
bcc .88
jsr SRC.IsAMReserved
bcc .88
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jsr SRC.IsDigit16
bcs .99
ldx #4
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.2 asl SRC.ACC
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rol SRC.ACC+1
rol SRC.ACC+2
rol SRC.ACC+3
bcs .9
dex
bne .2
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ora SRC.ACC
sta SRC.ACC
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bra .1
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.88 dec SRC.BufPtr Back One Char
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.8 clc
rts
.9 lda #ERR.VAL.TOO.BIG
sec
rts
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.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetOctal stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.GetChar
beq .99
jsr SRC.IsDigit8
bcs .99
and #$0F
sta SRC.ACC
.1 jsr SRC.GetChar
beq .8
cmp #' '
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beq .88
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jsr SRC.IsEXPReserved
bcc .88
jsr SRC.IsAMReserved
bcc .88
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jsr SRC.IsDigit8
bcs .99
asl
asl
asl
asl
asl
ldx #3
.2 asl
rol SRC.ACC
rol SRC.ACC+1
rol SRC.ACC+2
rol SRC.ACC+3
bcs .9
dex
bne .2
bra .1
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.88 dec SRC.BufPtr Back One Char
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.8 clc
rts
.9 lda #ERR.VAL.TOO.BIG
sec
rts
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.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetBinary stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.GetChar
beq .99
cmp #'1'
beq .10
cmp #'0'
bne .99
.10 and #$01
sta SRC.ACC
.1 jsr SRC.GetChar
beq .8
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cmp #' '
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beq .88
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jsr SRC.IsEXPReserved
bcc .88
jsr SRC.IsAMReserved
bcc .88
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cmp #'1'
beq .11
cmp #'0'
bne .8
.11 lsr
rol SRC.ACC
rol SRC.ACC+1
rol SRC.ACC+2
rol SRC.ACC+3
bcs .9
bra .1
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.88 dec SRC.BufPtr Back One Char
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.8 clc
rts
.9 lda #ERR.VAL.TOO.BIG
sec
rts
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.99 lda #ERR.SYNTAX.ERROR
sec
rts
*---------------------------------------
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SRC.GetLabel >STYA ZPPtr1
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jsr SRC.GetCharUC
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beq .9
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jsr SRC.IsLetter
bcs .9
ldy #1
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sta (ZPPtr1),y
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.1 jsr SRC.GetCharUC
beq .8
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jsr SRC.IsLetterOrDigit
bcc .2
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cmp #'.'
beq .2
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cmp #'_'
beq .2
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cmp #' '
beq .88
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jsr SRC.IsEXPReserved
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bcc .88
jsr SRC.IsAMReserved
bcc .88
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.9 lda #ERR.SYNTAX.ERROR
sec
rts
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.2 iny
sta (ZPPtr1),y
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cpy #SRC.GLABEL.MAXLEN
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bcc .1 if equ Carry is set
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.88 dec SRC.BufPtr Back One Char
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.8 tya
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sta (ZPPtr1)
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clc
rts
*---------------------------------------
SRC.GetKeyword >STYA ZPPtr1
jsr SRC.GetArg
bcs .9
stz SRC.Keyword.ID
ldy #0
.3 lda (ZPPtr1),y
beq .9
cmp SRC.Buffer
bne .6
phy
ldx #0
.4 iny
inx
lda (ZPPtr1),y
cmp SRC.Buffer,x
bne .5
cpx SRC.Buffer
bne .4
ply
ldx SRC.Keyword.ID
clc
rts
.5 ply
.6 tya
sec Add keyword Len+1
adc (ZPPtr1),y
tay
inc SRC.Keyword.ID
inc SRC.Keyword.ID
bra .3
.9 sec
rts
*---------------------------------------
SRC.GetArg jsr SRC.GetCharUC
beq .9
sta SRC.Buffer+1
ldy #1
.1 jsr SRC.GetCharUC
beq .2
cmp #' '
beq .2
iny
sta SRC.Buffer,y
bra .1
.2 sty SRC.Buffer
clc
rts
.9 sec
rts
*---------------------------------------
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SRC.IsAMReserved ldx SRC.AM.RESERVED
.1 cmp SRC.AM.RESERVED,x
beq .8
dex
bne .1
sec
rts
.8 clc
rts
*---------------------------------------
2015-12-17 16:57:35 +00:00
SRC.IsMODReserved ldx SRC.MOD.RESERVED
.1 cmp SRC.MOD.RESERVED,x
beq .8
dex
bne .1
sec
rts
.8 clc
rts
*---------------------------------------
2015-10-30 16:34:59 +00:00
SRC.IsEXPReserved ldx SRC.EXP.RESERVED
.1 cmp SRC.EXP.RESERVED,x
beq .8
dex
bne .1
sec
rts
.8 clc
rts
*---------------------------------------
2015-10-06 16:14:48 +00:00
SRC.IsLetterOrDigit jsr SRC.IsDigit10
bcc SRC.IsLetterRTS
*---------------------------------------
SRC.IsLetter cmp #'A'
bcc .9
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cmp #'Z'+1
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bcc SRC.IsLetterRTS
cmp #'a'
bcc .9
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cmp #'z'+1
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rts CC if lowercase
.9 sec
SRC.IsLetterRTS rts
*---------------------------------------
2015-10-28 16:55:12 +00:00
SRC.IsDigit16 jsr SRC.IsDigit10
bcc .8
cmp #'A'
bcc .9
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cmp #'F'+1
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bcc .1
rts cc if ok, cs if not
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.1 sbc #'A'-11 cc so A->10 (11-CC)
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clc
.8 and #$0F
rts
.9 sec
rts
*---------------------------------------
2015-10-06 16:14:48 +00:00
SRC.IsDigit10 cmp #'0'
bcc .9
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cmp #'9'+1
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rts cc if ok, cs if not
2015-10-30 16:34:59 +00:00
.9 sec
rts
*---------------------------------------
SRC.IsDigit8 cmp #'0'
bcc .9
cmp #'7'+1
rts cc if ok, cs if not
2015-10-06 16:14:48 +00:00
.9 sec
rts
*---------------------------------------
2015-10-09 15:53:30 +00:00
SRC.GetCharNB jsr SRC.GetCharUC
2015-10-06 16:14:48 +00:00
beq .9
cmp #' '
beq SRC.GetCharNB
.9 rts
*---------------------------------------
SRC.GetCharUC jsr SRC.GetChar
beq .9
cmp #'a'
bcc .9
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cmp #'z'+1
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bcs .9
eor #$20 to Uppercase
.9 rts
*---------------------------------------
SRC.GetChar ldx SRC.BufPtr
lda UsrBuf256,x
2015-10-28 16:55:12 +00:00
beq .9
inc SRC.BufPtr if 255, will make Z
.9 rts
2015-10-06 16:14:48 +00:00
*---------------------------------------
SRC.ACC10 lda SRC.ACC ACC*2-> ACC & ACCTMP
asl
sta SRC.ACC
sta SRC.ACCTMP
lda SRC.ACC+1
rol
sta SRC.ACC+1
sta SRC.ACCTMP+1
lda SRC.ACC+2
rol
sta SRC.ACC+2
sta SRC.ACCTMP+2
lda SRC.ACC+3
rol
sta SRC.ACC+3
sta SRC.ACCTMP+3
bcs .9
2015-11-20 16:31:14 +00:00
ldx #2
.1 asl SRC.ACC ACC=ACC*4
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rol SRC.ACC+1
rol SRC.ACC+2
rol SRC.ACC+3
bcs .9
dex
bne .1
lda SRC.ACC CC from ROL SRC.ACC+3
adc SRC.ACCTMP
sta SRC.ACC
lda SRC.ACC+1
adc SRC.ACCTMP+1
sta SRC.ACC+1
lda SRC.ACC+2
adc SRC.ACCTMP+2
sta SRC.ACC+2
lda SRC.ACC+3
adc SRC.ACCTMP+3
sta SRC.ACC+3 CS if overflow
.9 rts
*---------------------------------------
MAN
SAVE BIN/ASM.S.SRC
LOAD BIN/ASM.S
ASM