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A2osX/BIN/ASM.S.SRC.txt
Rémy GIBERT a7585c2417 Kernel 0.93 : ASM
2019-03-25 07:04:40 +00:00

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NEW
PREFIX
AUTO 4,1
*---------------------------------------
SRC.ParseLine jsr OUT.Reset
jsr SRC.GetChar
bcs .8
cmp #'*' Comment?
beq .8
cmp #';' Comment?
beq .8
>LDA.G ASM.DO.StackPtr
beq .1
clc
adc #ASM.DO.Stack-1
tay
lda (pData),y
beq .8
.1 >LDA.G ASM.MA.ON
bmi SRC.ParseLine.MACRO
jmp SRC.ParseLine.LABEL
.8 clc
.9 rts
*---------------------------------------
SRC.ParseLine.Macro
>STZ.G MAC.BufPtr
sta (ZPMacroBuf)
lda (ZPLinePtr)
cmp #' ' No label, scan to DIR/OP if any
bne .1
jsr SRC.GetNextCharNB
bcs .8
lda #' ' Store ONE blank
jsr MAC.AddChar
bcs .90
lda (ZPLinePtr) get back non blank char
bra .2
.1 jsr MAC.AddChar
bcs .99
jsr SRC.GetNextChar
bcs .80
cmp #' '
bne .1
jsr MAC.AddChar
.90 bcs .99
jsr SRC.GetNextCharNB
bcs .80
.2 cmp #'.' Directive ?
bne .4
ldy #1
lda (ZPLinePtr),y
beq .3
cmp #'E'
beq .21
cmp #'e'
bne .3
.21 iny
lda (ZPLinePtr),y
beq .3
cmp #'M'
beq .22
cmp #'m'
bne .3
.22 >STZ.G ASM.MA.ON
.8 clc
rts
.80 lda #0
jmp MAC.AddChar
.3 lda (ZPLinePtr)
.4 jsr MAC.AddChar
bcs .99
jsr SRC.GetNextChar
bcs .80
cmp #' '
bne .4
jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .80 Comments...
pha
lda #' '
jsr MAC.AddChar
pla
bcs .99
.5 jsr MAC.AddChar Store ARG....
bcs .99
jsr SRC.GetNextChar
bcs .80
cmp #' '
bne .5
bra .80 End of Line
.99
SRC.ParseLine.RTS
rts
*---------------------------------------
SRC.ParseLine.LABEL
jsr SRC.GetChar
cmp #' ' no label...go scan dir/opcode
beq SRC.ParseLine.DirOp
cmp #'.' local symbol?
bne .1
>LDA.G SYM.bInGlobal Not relative to Global label...
bpl SRC.ParseLine.InvLbl
jsr SRC.GetNextChar
bcs SRC.ParseLine.InvLbl
jsr SRC.GetDecimal
bcs SRC.ParseLine.InvLbl
lda SRC.ACC+1
ora SRC.ACC+2
ora SRC.ACC+3
bne SRC.ParseLine.InvLbl Max .255
lda SRC.ACC
beq SRC.ParseLine.InvLbl .0 is not allowed
jsr SYM.NewOrGetLocalA
bcs SRC.ParseLine.RTS
bra SRC.ParseLine.DirOp
.1 jsr SYM.NewOrGetGlobal
bcs SRC.ParseLine.RTS
*---------------------------------------
SRC.ParseLine.DirOp
jsr SRC.GetNextCharNB Scan for an Opcode...
bcs SRC.ParseLine.Ok
cmp #'.'
bne .5
jsr SRC.GetNextChar
bcs SRC.ParseLine.InvDir
jsr SRC.ParseLine.Dir
bcs SRC.ParseLine.Err
bra SRC.ParseLine.Ok
.5 cmp #'>'
bne SRC.ParseLine.OpCode
jsr SRC.ParseLine.ExecMacro
bcs SRC.ParseLine.Err
bra SRC.ParseLine.Ok
SRC.ParseLine.Ok
clc
SRC.ParseLine.Err
rts
SRC.ParseLine.InvLbl
lda #E.INV.LABEL
sec
rts
SRC.ParseLine.InvDir
lda #E.INV.DIR
sec
rts
*---------------------------------------
SRC.ParseLine.Dir
>LDYA L.T.DIRECTIVES
jsr SRC.GetKeyword
bcs SRC.ParseLine.InvDir
jmp (J.DIRECTIVES,x)
*---------------------------------------
SRC.ParseLine.ExecMacro
jsr SRC.GetNextChar skip '>'
bcs .90
jsr MAC.Lookup
bcs .90
>LDA.G ASM.MA.StackPtr
cmp #MA.MAXDEPTH
beq .91
clc
adc #ASM.MA.StackPtr
tay
>INC.G ASM.MA.StackPtr
clc
rts
.90 lda #E.MACRO.INV
sec
rts
.91 lda #E.MACRO.INV
sec
rts
*---------------------------------------
SRC.ParseLine.OpCode
>LDYA ZPOpsPtr
>STYA ZPOpDefPtr
.1 lda (ZPOpDefPtr) End Of OpCode List
ldy #1
ora (ZPOpDefPtr),y
beq .9
lda ZPOpDefPtr
clc
adc #2
sta ZPPtr2
lda ZPOpDefPtr+1
adc #0
sta ZPPtr2+1
lda (ZPPtr2)
tax
ldy #0
.2 lda (ZPLinePtr),y
beq .7
cmp #'a'
bcc .3
cmp #'z'+1
bcs .3
eor #$20
.3 iny
cmp (ZPPtr2),y
bne .7
dex
bne .2
lda (ZPLinePtr),y
beq .8 End of Line, no AM
cmp #C.SPACE A space after opcode ?
bne .7
tya
sec skip OP + ' '
adc ZPLinePtr
sta ZPLinePtr
bcc .5
inc ZPLinePtr+1
.5 bra SRC.ParseLine.AM
.7 lda ZPOpDefPtr
clc
adc (ZPOpDefPtr)
tax
lda ZPOpDefPtr+1
ldy #1
adc (ZPOpDefPtr),y
stx ZPOpDefPtr
sta ZPOpDefPtr+1
bra .1
.8 lda #$ff
>STA.G SRC.AMID
jsr SRC.ParseLine.AMCheck4OP
bcs .99
jmp SRC.ParseLine.Emit
.9 lda #E.INV.OPCODE
sec
.99 rts
*---------------------------------------
SRC.ParseLine.AM
stz SRC.AM.StrBuf
.1 jsr SRC.GetChar
bcs .8
.10 cmp #' ' another space ?
beq .8 ignore end of line (comment)
jsr SRC.IsAMReserved
bcs .2
jsr SRC.AddToBuf
bra .7
.2 jsr SRC.IsLetter Any register?
bcs .6 no, try something else
>LDYA ZPRPtr Check in register table
jsr SRC.GetKeyword
bcs .6
lda (ZPPtr1) get register len
tax
.4 inc ZPPtr1
bne .5
inc ZPPtr1+1
.5 lda (ZPPtr1)
jsr SRC.AddToBuf
dex
bne .4
bra .1
.6 jsr EXP.Eval
bcs .99
>LDA.G EXP.Prefix
beq .75
jsr SRC.AddToBuf
.75 ldx #2
lda SRC.ACC.F
bit #SYMG.F.FWREF
bne .72 FWREF ...assume 2 bytes...
ldx SRC.ACC.SIZE
.73 lda SRC.ACC-1,x
bne .72
dex
bne .73
inx
.72 lda #'a'
.71 jsr SRC.AddToBuf
dex
bne .71
bra .1
.7 jsr SRC.GetNextChar
bcc .10
.8 jsr SRC.ParseLine.AMCheck
bcs .9
jsr SRC.ParseLine.AMCheck4OP
bcc .88
.80 jsr SRC.ExpandAddress
cpx #5
bne .8
.9 lda #E.INV.AM
sec
.99 rts
.88 jmp SRC.ParseLine.Emit
*---------------------------------------
SRC.ParseLine.AMCheck
* ldx #5
*.10 lda SRC.ACC.F,x
* >PUSHA
* dex
* bpl .10
* >PUSHBI 6
* >LDYA L.MSG.ACC
* >SYSCALL printf
* >LDYA L.SRC.AM.StrBuf
* jsr DEBUG.PSTR
>LDYA ZPAMPtr Check if AM is valid for CPU
>STYA ZPPtr1
ldx #0
.1 inx
* phx
* lda #'?'
* >SYSCALL putchar
* >LDYA ZPPtr1
* jsr DEBUG.PSTR
* plx
lda (ZPPtr1)
beq .9
cmp SRC.AM.StrBuf
bne .7
tay
.2 lda (ZPPtr1),y
cmp SRC.AM.StrBuf,y
bne .6
dey
bne .2
txa
>STA.G SRC.AMID
clc
rts
.6 lda (ZPPtr1)
.7 sec
adc ZPPtr1
sta ZPPtr1
bcc .1
inc ZPPtr1+1
bra .1
.9 sec
rts
*---------------------------------------
SRC.ParseLine.AMCheck4OP
lda ZPOpDefPtr Skip nextLoHi,L,"ADC"
ldx ZPOpDefPtr+1
clc
adc #2 Skip nextLoHi
bcc .11
inx
.11 sec skip LEN Byte
ldy #2 LEN Byte
adc (ZPOpDefPtr),y
bcc .10
inx
.10 sta ZPPtr1
stx ZPPtr1+1
lda (ZPPtr1) AMID...
.1 >CMP.G SRC.AMID
beq .8
lda ZPPtr1 Skip AMID,L,"39aa"
ldx ZPPtr1+1
inc AMID....
bne .12
inx
.12 sec LEN byte...
ldy #1 String...
adc (ZPPtr1),y
bcc .2
inx
.2 sta ZPPtr1
stx ZPPtr1+1
lda (ZPPtr1)
bne .1
lda #E.INV.AM.4.OC
sec
rts
.8 >LDYA ZPPtr1
>STYA ZPOpDefPtr
clc
rts
*---------------------------------------
SRC.ParseLine.Emit
stz SRC.ACCTMP index in ACC
ldy #1
lda (ZPOpDefPtr),y
sta SRC.ACCTMP+1 Char Count in AM
iny
.4 lda (ZPOpDefPtr),y
cmp #'a
bcs .5 lowercase, go compute address
jsr SRC.IsDigit16
asl
asl
asl
asl
sta SRC.ACCTMP+2
iny
dec SRC.ACCTMP+1
lda (ZPOpDefPtr),y
jsr SRC.IsDigit16
ora SRC.ACCTMP+2
.50 jsr OUT.EmitByte
bcs .9
iny
dec SRC.ACCTMP+1
bne .4
clc
rts
.5 bne .6 cmp #'a'....
ldx SRC.ACCTMP
inc SRC.ACCTMP
lda SRC.ACC,x
bra .50
.6 cmp #'r
bne .7
lda SRC.ACC.SIZE
beq .50 Emit 00 if pending symbol (pass #1)
jsr SRC.ComputeRel8
bcs .91
bra .50
.7 cmp #'l
bne .90
lda SRC.ACC.SIZE
bne .71
jsr OUT.EmitByte Emit 00 00 if pending symbol (pass #1)
bcs .9
lda #0
bra .50
.71 jsr SRC.ComputeRel16
bcs .91
lda SRC.ACC
jsr OUT.EmitByte
bcs .9
lda SRC.ACC+1
bra .50
.8 clc
.9 rts
.90 lda #E.INV.T.FILE
sec
rts
.91 lda #E.RANGE
sec
rts
*---------------------------------------
SRC.AddToBuf inc SRC.AM.StrBuf
ldy SRC.AM.StrBuf
sta SRC.AM.StrBuf,y
rts
*---------------------------------------
SRC.ExpandAddress
ldy SRC.AM.StrBuf
.1 lda SRC.AM.StrBuf,y
sta SRC.AM.StrBuf+1,y
dey
cmp #'a'
bne .1
ldx #2 "aa"
tya
beq .8
.2 lda SRC.AM.StrBuf,y
cmp #'a'
bne .8
inx "aaa"
.3 dey
bne .2
.8 inc SRC.AM.StrBuf
rts
*---------------------------------------
SRC.ComputeRel8 jsr SRC.ComputeRel
bcc .1
* positive : check 0<r<0000007F
lda SRC.ACC+3
ora SRC.ACC+2
ora SRC.ACC+1
bne .9
lda SRC.ACC
bmi .9
clc
rts
* negative : check FFFFFF80<r<FFFFFFFF
.1 lda SRC.ACC+3
and SRC.ACC+2
and SRC.ACC+1
inc
bne .9
lda SRC.ACC
bpl .9
clc
rts
.9 sec
rts
*---------------------------------------
SRC.ComputeRel16
jsr SRC.ComputeRel
bcc .1
* positive : check 0<r<00007FFF
lda SRC.ACC+3
ora SRC.ACC+2
bne .9
lda SRC.ACC+1
bmi .9
clc
rts
* negative : check FFFF8000<r<FFFFFFFF
.1 lda SRC.ACC+3
and SRC.ACC+2
inc
bne .9
lda SRC.ACC+1
bpl .9
clc
rts
.9 sec
rts
*---------------------------------------
SRC.ComputeRel phy
ldy #ASM.PC
clc
lda SRC.ACC
sbc (pData),y
sta SRC.ACC
iny
lda SRC.ACC+1
sbc (pData),y
sta SRC.ACC+1
iny
lda SRC.ACC+2
sbc (pData),y
sta SRC.ACC+2
iny
lda SRC.ACC+3
sbc (pData),y
sta SRC.ACC+3
ply
rts
*---------------------------------------
SRC.GetDecimal jsr SRC.GetChar
beq .99
stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.IsDigit10
bcs .99
and #$0F
sta SRC.ACC
.1 jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .8
jsr SRC.IsEXPReserved
bcc .8
jsr SRC.IsAMReserved
bcc .8
jsr SRC.IsDigit10
bcs .9
and #$0F
pha
jsr SRC.ACC10
pla
bcs .9
adc SRC.ACC
sta SRC.ACC
bcc .1
inc SRC.ACC+1
bne .1
inc SRC.ACC+2
bne .1
inc SRC.ACC+3
bne .1
.9 lda #E.VAL.TOO.BIG
sec
rts
.8 clc
rts
.99 lda #E.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetHex jsr SRC.GetNextChar skip '$'
bcs .99
stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.IsDigit16
bcs .99
sta SRC.ACC
.1 jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .8
jsr SRC.IsEXPReserved
bcc .8
jsr SRC.IsAMReserved
bcc .8
jsr SRC.IsDigit16
bcs .99
ldx #4
.2 asl SRC.ACC
rol SRC.ACC+1
rol SRC.ACC+2
rol SRC.ACC+3
bcs .9
dex
bne .2
ora SRC.ACC
sta SRC.ACC
bra .1
.8 clc
rts
.9 lda #E.VAL.TOO.BIG
sec
rts
.99 lda #E.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetOctal jsr SRC.GetNextChar skip '&'
bcs .99
stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
jsr SRC.IsDigit8
bcs .99
and #$0F
sta SRC.ACC
.1 jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .8
jsr SRC.IsEXPReserved
bcc .8
jsr SRC.IsAMReserved
bcc .8
jsr SRC.IsDigit8
bcs .9
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
.8 clc
rts
.9 lda #E.VAL.TOO.BIG
sec
rts
.99 lda #E.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetBinary jsr SRC.GetNextChar skip '%'
bcs .99
stz SRC.ACC+1
stz SRC.ACC+2
stz SRC.ACC+3
cmp #'1'
beq .10
cmp #'0'
bne .99
.10 and #$01
sta SRC.ACC
.1 jsr SRC.GetNextChar
bcs .8
cmp #' '
beq .8
jsr SRC.IsEXPReserved
bcc .8
jsr SRC.IsAMReserved
bcc .8
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
.8 clc
rts
.9 lda #E.VAL.TOO.BIG
sec
rts
.99 lda #E.SYNTAX.ERROR
sec
rts
*---------------------------------------
SRC.GetKeyword >STYA ZPPtr1 KeyWord table
ldx #0 Keyword.ID
.1 phx
lda (ZPPtr1)
beq .9 End Of table
tax KW len
ldy #0
.3 lda (ZPLinePtr),y
beq .6
jsr SRC.IsKeywordLetterUC
bcs .6
iny
cmp (ZPPtr1),y
bne .7
dex
bne .3
lda (ZPLinePtr),y All chars match...
beq .4 End of Line ?
jsr SRC.IsKeywordLetterUC
bcc .7 Additional letters...
.4 lda ZPLinePtr found!
clc
adc (ZPPtr1) skip KW in source line
sta ZPLinePtr
bcc .5
inc ZPLinePtr+1
.5 plx Keyword.ID
clc
rts
.6
.7 lda (ZPPtr1)
sec Add keyword Len+1
adc ZPPtr1
sta ZPPtr1
bcc .8
inc ZPPtr1+1
.8 plx Keyword.ID
inx
inx
bra .1
.9 plx
sec
rts
*---------------------------------------
SRC.IsAMReserved
ldx SRC.AM.RESERVED
.1 cmp SRC.AM.RESERVED,x
beq .8
dex
bne .1
sec
rts
.8 clc
rts
*---------------------------------------
SRC.IsMODReserved
ldx SRC.MOD.RESERVED
.1 cmp SRC.MOD.RESERVED,x
beq .8
dex
bne .1
sec
rts
.8 clc
rts
*---------------------------------------
SRC.IsEXPReserved
ldx SRC.EXP.RESERVED
.1 cmp SRC.EXP.RESERVED,x
beq SRC.IsEXPReserved.8
dex
bne .1
sec
rts
SRC.IsEXPReserved.8
clc
rts
*---------------------------------------
SRC.IsKeywordLetterUC
cmp #'.'
beq SRC.IsEXPReserved.8
cmp #'_'
beq SRC.IsEXPReserved.8
cmp #'A'
bcc .9
cmp #'Z'+1
bcc .99
cmp #'a'
bcc .9
cmp #'z'+1
eor #$20
rts CC if lowercase
.9 sec
.99 rts
*---------------------------------------
SRC.IsLetterOrDigit
jsr SRC.IsDigit10
bcc SRC.IsLetterRTS
*---------------------------------------
SRC.IsLetter cmp #'A'
bcc .9
cmp #'Z'+1
bcc SRC.IsLetterRTS
cmp #'a'
bcc .9
cmp #'z'+1
rts CC if lowercase
.9 sec
SRC.IsLetterRTS rts
*---------------------------------------
SRC.IsDigit16 jsr SRC.IsDigit10
bcc .8
cmp #'A'
bcc .9
cmp #'F'+1
bcc .1
cmp #'a'
bcc .9
cmp #'f'+1
bcs .9
eor #$20
.1
* clc
sbc #'A'-11 cc so A->10 (11-CC)
clc
.8 and #$0F
rts
.9 sec
rts
*---------------------------------------
SRC.IsDigit10 cmp #'0'
bcc .9
cmp #'9'+1
rts cc if ok, cs if not
.9 sec
rts
*---------------------------------------
SRC.IsDigit8 cmp #'0'
bcc .9
cmp #'7'+1
rts cc if ok, cs if not
.9 sec
rts
*---------------------------------------
SRC.GetNextCharNB
jsr SRC.GetNextChar
bcs .9
cmp #' '
beq SRC.GetNextCharNB
clc
.9 rts
*---------------------------------------
SRC.GetNextCharUC
jsr SRC.GetNextChar
bcs .9
cmp #'a'
bcc .8
cmp #'z'+1
bcs .8
eor #$20 to Uppercase
.8 clc
.9 rts
*---------------------------------------
SRC.GetNextChar lda (ZPLinePtr)
beq SRC.GetChar.ERR
cmp #$0D
beq SRC.GetChar.ERR
inc ZPLinePtr
bne SRC.GetChar
inc ZPLinePtr+1
SRC.GetChar lda (ZPLinePtr)
beq SRC.GetChar.ERR
cmp #$0D
beq SRC.GetChar.ERR
clc
rts
SRC.GetChar.ERR sec
rts
*---------------------------------------
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
ldx #2
.1 asl SRC.ACC ACC=ACC*4
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
*---------------------------------------
DEBUG.PSTR >PUSHYA
>PUSHBI 2
>LDYA L.MSG.PSTR
>SYSCALL printf
rts
*---------------------------------------
MAN
SAVE USR/SRC/BIN/ASM.S.SRC
LOAD USR/SRC/BIN/ASM.S
ASM
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