A2osX/BIN/ASM.S.SRC.txt

PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
					.LIST OFF
*---------------------------------------
SRC.ParseLine		ldx TmpBuffer256
					beq SRC.ParseLine.Skip
					
					cpx #'*'			Comment?
					beq SRC.ParseLine.Skip
					cpx #';'			Comment?
					beq SRC.ParseLine.Skip
					
					cpx #' '			no label...go scan dir/opcode
					beq .4
					
.1					cpx #'.'			local symbol?
					bne	.2
					jsr SRC.ParseLine.SymL
					bra .3
					
.2					jsr SRC.ParseLine.SymG
.3					bcs SRC.ParseLine.Err
 
.4					jsr SRC.GetCharNB	Scan for an Opcode...
					beq SRC.ParseLine.Ok
					
					cmp #'.'
					bne .5
					
					jsr SRC.ParseLine.Dir
					bcs SRC.ParseLine.Err
					bra SRC.ParseLine.Ok

.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
					bcs SRC.ParseLine.Err

					
SRC.ParseLine.Ok	lda SRC.Label.Flags
					beq .1
					
					jsr SYM.Add
					bcs SRC.ParseLine.Err
.1										
SRC.ParseLine.skip	clc					
					rts
					
SRC.ParseLine.Err1	lda #ERR.INVALID.LABEL
SRC.ParseLine.Err	sec
					rts
*---------------------------------------
SRC.ParseLine.SymP	jsr SRC.GetChar
					beq SRC.ParseLine.SymE
					jsr SRC.GetDecimal
					bcs SRC.ParseLine.SymR
					jmp SYM.AddPrivate
*---------------------------------------
SRC.ParseLine.SymL	jsr SRC.GetChar
					beq SRC.ParseLine.SymE
					jsr SRC.GetDecimal
					bcs SRC.ParseLine.SymR
					jmp SYM.AddLocal
*---------------------------------------
SRC.ParseLine.SymG	jsr SYM.ClearLocal
					jsr SRC.GetLabel
					bcs SRC.ParseLine.SymE
					
					inc SRC.Label.Flags	Remember to Add Label
					
					ldx #3				Makes Current Label = PC for now
					ldy #ASM.PC
					lda (pdata),y
.1					sta SRC.LabelValue,x
					dey
					dex
					bpl .1
					clc
					rts
					
SRC.ParseLine.SymE	lda #ERR.INVALID.LABEL
					sec
SRC.ParseLine.SymR	rts
*---------------------------------------
SRC.ParseLine.Dir	>LDYA L.T.DIRECTIVES
					jsr SRC.GetKeyword
					bcs .9
					
					jmp (J.DIRECTIVES,x)
					
.9					lda #ERR.INVALID.DIRECTIVE
					sec
					rts
*---------------------------------------
SRC.ParseLine.Exec.Macro
					clc
					rts
*---------------------------------------
SRC.ParseLine.Add.Macro
					clc
					rts
*---------------------------------------
SRC.ParseLine.OpCode
					jsr SRC.GetArg
					bcs .9

					ldy #ASM.T.hMem
					lda (pData),y
					>SYSCALL SYS.GetMemPtrA
					>STYA ZPPtr1

					ldy #ASM.T.O		setup Ptr to Opcodes
					lda (ZPPtr1),y
					clc
					adc ZPPtr1
					sta ZPPtr2
					iny
					lda (ZPPtr1),y
					adc ZPPtr1+1
					sta ZPPtr2+1
					
					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
					
					
.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
					
					jsr SRC.ParseLine.AM
					bcs .99
					clc
					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
.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

										
.8					lda SRC.AM.StrBuf
					beq .89
					>PUSHW L.SRC.AM.StrBuf
					>PUSHW L.MSG.DEBUG
					>LIBCALL hLIBSTR,LIBSTR.PRINTF
.89					clc
					rts
					
.2					jsr SRC.IsLetter	Any register?
					bcs .70				no, try something else
					
					stz SRC.AM.tmpBuf
					sta SRC.AM.tmpBuf+1
					inc SRC.AM.tmpBuf
					
.3					jsr SRC.GetCharUC
					beq .4
					jsr SRC.IsLetterOrDigit
					bne .4
					inc SRC.AM.tmpBuf
					ldx SRC.AM.tmpBuf
					sta SRC.AM.tmpBuf,x
					bra .3
					
.4					dec SRC.BufPtr		back one char

					ldy #0
					
.5					lda (ZPPtr3),y
					beq .71				last register ?
					
					ldx #$ff
					
.6					lda (ZPPtr3),y
					iny
					inx
					cmp SRC.AM.tmpBuf,x
					bne .7
					
					cpx SRC.AM.tmpBuf
					bne .6
					
					ldy #0				register match, add to AM string
					ldx SRC.AM.StrBuf
					
.61					iny
					lda SRC.AM.tmpBuf,y
					sta SRC.AM.StrBuf,x					
					inx
					cpy SRC.AM.tmpBuf
					bne .61
					stx SRC.AM.StrBuf
					bra .72
					
.7					iny 
					bra .5

.70					dec SRC.BufPtr		back one char
					
					
.71					jsr SRC.GetExp
					bcs .99
.72					jmp .1
					clc
					rts

					
					
.9					lda #ERR.INVALID.AM.SYN
					sec
.99					rts
*---------------------------------------
SRC.PrintLine		bcs .8				if CS, unconditional
					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 TmpBuffer256
					>PUSHW SRC.LINENUM
					>PUSHW L.MSG.SRCLINE
					>LIBCALL hLIBSTR,LIBSTR.PRINTF
.9					rts
*---------------------------------------
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 #' '
					beq .8
					jsr SRC.IsDigit10
					bcs .99
					and #$0F
					
					pha
					jsr SRC.ACC10
					pla
					bcs .9
					clc
					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
					
.8					clc
					rts
					
.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
					and #$0F
					sta SRC.ACC
					
.1					jsr SRC.GetChar
					beq .8
					cmp #' '
					beq .8
					jsr SRC.IsDigit16
					bcs .99
					
					asl
					asl
					asl
					asl
					
					ldx #4
.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 #ERR.VAL.TOO.BIG
					sec
					rts
					
.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 #' '
					beq .8
					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
					
.8					clc
					rts
					
.9					lda #ERR.VAL.TOO.BIG
					sec
					rts
					
.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
					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 #ERR.VAL.TOO.BIG
					sec
					rts
					
.99					lda #ERR.SYNTAX.ERROR
					sec
					rts
*---------------------------------------
SRC.GetLabel		jsr SRC.GetCharUC
					
					beq .9
					jsr SRC.IsLetter
					bcs .9
					sta SRC.Label
					
					ldy #1
					
.1					jsr SRC.GetCharUC
					beq .8
					
					cmp #' '
					beq .8
					
					cmp #'.'
					beq .2
					
					jsr SRC.IsLetterOrDigit
					bcs .9
.2					sta SRC.Label,y
					iny
					cpy #SRC.LABEL.MAXLEN
					bne .1				if equ Carry is set
					
.9					sec
					rts					
					
.8					lda #0
					sta SRC.Label,y
					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.GetExp			stz SRC.Exp
					jsr SRC.GetCharUC
					beq .9

					ldy #0
					jsr SRC.IsAMReserved
					bcc .8
					
					iny
					sta SRC.Exp+1
					
.1					jsr SRC.GetCharUC
					beq .89
					cmp #' '
					beq .89
					jsr SRC.IsAMReserved
					bcc .8
					iny
					sta SRC.Exp,y
					bra .1
					
.8					dec SRC.BufPtr
.89					sty SRC.Exp
					clc
					rts
					
.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
*---------------------------------------
SRC.IsAMReserved	ldx SRC.AM.RESERVED
.1					cmp SRC.AM.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 .8
					dex
					bne .1
					sec
					rts
.8					clc
					rts					
*---------------------------------------
SRC.IsLetterOrDigit jsr SRC.IsDigit10
					bcc SRC.IsLetterRTS
*---------------------------------------
SRC.IsLetter		cmp #'A'
					bcc .9
					cmp #'['
					bcc SRC.IsLetterRTS

					cmp #'a'
					bcc .9
					cmp #'{'
					rts					CC if lowercase
					
.9					sec					
SRC.IsLetterRTS		rts					
*---------------------------------------
SRC.IsDigit16		jsr SRC.IsDigit10
					bcc .8
					cmp #'A'
					bcc .9
					cmp #'G'
					bcc .1
					rts					cc if ok, cs if not
					
.1					sbc #'A'-10			cc so A->10
					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.GetCharNB		jsr SRC.GetCharUC
					beq .9
					cmp #' '
					beq SRC.GetCharNB
.9					rts
*---------------------------------------
SRC.GetCharUC		jsr SRC.GetChar
					beq .9
					cmp #'a'
					bcc .9
					cmp #'z'+1
					bcs .9
					eor #$20			to Uppercase
.9					rts
*---------------------------------------
SRC.GetChar			ldx SRC.BufPtr
					lda TmpBuffer256,x
					beq .9
					inc SRC.BufPtr		if 255, will make Z
					and #$7f			Make sure NZ
.9					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 #1
.1					asl SRC.ACC			ACC=ACC*8
					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