PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
					.LIST OFF
					.OP	65C02
					.OR $2000
					.TF	/A2OSX.BOOT/BIN/ASM
*---------------------------------------
					.INB INC/MACROS.I
					.INB INC/A2OSX.I
					.INB INC/A2OSX.API.I
					.INB INC/LIBSTR.I
*---------------------------------------
SYM.BLOCK.SIZE		.EQ 4096
SYM.BLOCK.MAX		.EQ 8
SRC.IN.DEPTH.MAX	.EQ 7
*---------------------------------------
ERR.INV.ARGS		.EQ 1
ERR.SRC.INV.TYPE	.EQ 2
ERR.SRC.TOO.MANY.IN	.EQ 3
ERR.SYM.TOO.LARGE	.EQ 10
ERR.LINE.TOO.LONG	.EQ 20
ERR.INVALID.LABEL	.EQ 21

*--------------------------------------
*			File Header (16 Bytes)
*--------------------------------------
CS.START			cld
					jmp (.1,x)
					.DA #$61			6502,Level 1 (65c02)
					.DA #1				BIN Layout Version 1
					.DA 0
					.DA CS.END-CS.START
					.DA DS.END-DS.START	Data Segment to Allocate
					.DA 0
					.DA 0
*--------------------------------------
* Relocation Table
*--------------------------------------
.1					.DA CS.INIT
					.DA CS.RUN
					.DA CS.DOEVENT		
					.DA	CS.QUIT
L.LIBSTR			.DA LIBSTR
L.MSG.HELP1			.DA MSG.HELP1
L.MSG.HELP2			.DA MSG.HELP2
L.MSG.SRCLINE		.DA MSG.SRCLINE
L.READ.BUFFER		.DA READ.BUFFER
					.DA 0
*---------------------------------------
CS.INIT				>LDYA L.LIBSTR
					>LOADLIBYA
					sta hLIBSTR
					
					ldy #S.PS.hARGS
					lda (pPs),y
					bne CS.INIT.ARGS
					
					>PUSHW L.MSG.HELP1
					>LIBCALL hLIBSTR,LIBSTR.PRINTF
					>PUSHW L.MSG.HELP2
					>LIBCALL hLIBSTR,LIBSTR.PRINTF
					lda #ERR.INV.ARGS
					sec
					rts

CS.INIT.ARGS		>SYSCALL SYS.GetMemPtrA
					>STYA ZPQuickPtr1
					lda (ZPQuickPtr1)
					beq .98
					
.1					ldy #1
					lda (ZPQuickPtr1),y
					cmp #'/'
					bne .2
					ldy #S.PS.hARGS
					lda (pPs),y
					>SYSCALL SYS.PStrCpyA
					bra .3
					
.2					ldy #S.PS.hARGS
					lda (pPs),y
					>PUSHA
					ldy #S.PS.hPREFIX
					lda (pPs),y
					>PUSHA
					>SYSCALL SYS.PStrCat
					
.3					jsr SRC.OPEN
					bcs .99
					
					lda (pPs)
					ora #S.PS.F.EVENT		Now accept events
					sta (pPs)

					clc
					rts
					
.98					lda #ERR.INV.ARGS

					sec
.99					rts
*--------------------------------------
CS.RUN				ldy #bCANCEL
					lda (pData),y
					beq .1
					sec
					rts

.1					ldy #bSTOP
					lda (pData),y
					beq .2
					clc
					rts
					
.2					jsr SRC.ReadLine
					bcs .9

					jsr SRC.ParseLine
					bcs .9
					
					>PUSHWI TmpBuffer256
					>PUSHW SRC.LINENUM
					>PUSHW L.MSG.SRCLINE
					>LIBCALL hLIBSTR,LIBSTR.PRINTF
					clc
.9					rts
*--------------------------------------
CS.DOEVENT			ldy #S.EVT.hDEV		is Event from active IN device?
					lda (pEvent),y
					ldy #S.PS.hINDEV
					cmp (pPs),y
					bne .9
					lda (pEvent)
					and #S.EVT.F.KEY		is it a KEY event?
					beq .9
					ldy #S.EVT.DATAHI		is it an O or SAPPLE key ?
					lda (pEvent),y
					bne	.9
					ldy #S.EVT.DATALO	
					lda (pEvent),y
					cmp #$03				Ctrl-C
					bne .1
					
					lda #$FF
					ldy #bCANCEL
					sta (pData),y
					bra .8
					
.1					cmp #$13				Ctrl-S
					bne .8
					
					ldy #bSTOP
					lda (pData),y
					eor #$FF
					sta (pData),y
					
.8					clc
					rts
					
.9					sec
					rts
*--------------------------------------
CS.QUIT				ldy #SRC.COUNT
					lda (pData),y
					beq .8
					
.1					clc
					adc #SRC.hREFNUMS-1
					tay
					lda (pData),y
					>SYSCALL SYS.MLICloseA
					
					ldy SRC.COUNT
					lda (pData),y
					clc
					adc #SRC.hBUFFERS-1
					tay
					lda (pData),y
					>SYSCALL SYS.FreeMemA
					
					ldy #SRC.COUNT
					lda (pData),y
					dec
					sta (pData),y
					bne .1
					
.8					lda hLIBSTR
					>SYSCALL SYS.UnloadLibA
					clc
					rts
*---------------------------------------
LOAD.ASM.T
					clc
					rts
*---------------------------------------
SRC.OPEN			sta hFileName

					ldy #SRC.COUNT
					lda (pData),y
					cmp #SRC.IN.DEPTH.MAX
					bne .10
					
					lda #ERR.SRC.TOO.MANY.IN
					sec
					rts
					
.10					lda hFileName
					>SYSCALL SYS.MLIOpenA
					bcs .99
					
					pha
					ldy #SRC.COUNT
					lda (pData),y
					clc
					adc #SRC.hREFNUMS
					tay
					pla
					sta (pData),y
					
					ldy #SRC.COUNT
					lda (pData),y
					clc
					adc #SRC.hBUFFERS
					tay
					txa
					sta (pData),y

					lda hFileName
					>SYSCALL SYS.MLIGetFileInfoA
					bcs .99

					>STYA ZPQuickPtr1
					ldy #1
					lda (ZPQuickPtr1),y
					tax
					
					ldy #SRC.COUNT
					lda (pData),y
					clc
					adc #SRC.hFILETYPES
					tay

					txa
					sta (pData),y
					
					cmp #$04			TXT?
					bne .1
					
					>PUSHBI $0D
					>PUSHBI $FF
					>PUSHB hFileName
					>SYSCALL SYS.MLINewLine
					bcs .99
					bra .8
					
.1					cmp #$FA			S-C/BAS?
					bne .98

.8					ldy #SRC.COUNT
					lda (pData),y
					inc
					sta (pData),y
					clc
					rts
					
.98					lda #ERR.SRC.INV.TYPE
					
.99					sec
					rts
*---------------------------------------
SRC.ReadLine		ldy #SRC.COUNT
					lda (pData),y
					clc
					adc #SRC.hFILETYPES-1
					tay
					lda (pData),y
					bmi SRC.ReadLine.TFA
					jmp SRC.ReadLine.T04
*---------------------------------------
SRC.ReadLine.TFA	>LDYAI 3			LEN + LINENUM
					jsr SRC.ReadLine.YA
					bcs .9 
					
					lda READ.BUFFER+1
					sta SRC.LINENUM
					lda READ.BUFFER+2
					sta SRC.LINENUM+1
					
					lda READ.BUFFER		LEN
					sec
					sbc #3				remove LEN + LINENUM from LEN
					bcc .9				LEN should be at least 3
					beq .8
					
					tay					Read remaining chars
					lda #0
					jsr SRC.ReadLine.YA
					bcs .9
					
					ldy #0
					ldx #0
					
.1					lda READ.BUFFER,y
					bmi .2
					sta TmpBuffer256,x
					beq .8				Ending 00
					inx
					beq .99
					iny
					bne .1
					bra .99
					
.2					cmp #$C0			REPEAT char?
					bne .5
					iny
					beq .99
					lda READ.BUFFER,y
					iny
					beq .99
.3					pha
					lda READ.BUFFER,y
					sta TmpBuffer256,x
					pla
					inx
					beq .99
					dec
					bne .3
					iny
					bne .1
					bra .99
					
.5					and #$3F			Compute blank count
.6					pha
					lda #$20
					sta TmpBuffer256,x
					pla
					inx
					beq .99
					dec
					bne .6
					iny
					bne .1
					bra .99
					
.8					clc
.9					rts

.99					lda #ERR.LINE.TOO.LONG
					sec
					rts
*--------------------------------------
SRC.ReadLine.T04
					clc
					rts
*--------------------------------------
SRC.ReadLine.YA		>PUSHYA
					>PUSHW L.READ.BUFFER
					ldy #SRC.COUNT
					lda (pData),y
					clc
					adc #SRC.hREFNUMS-1
					tay
					lda (pData),y
					>PUSHA
					>SYSCALL SYS.MLIRead
					rts
*---------------------------------------
SRC.ParseLine		stz SRC.BufPtr
					jsr SRC.GetNextChar
					beq .8
					cmp #'*'			Comment?
					beq .8
					cmp #' '
					beq SRC.ParseLine.OpCode
					
SRC.ParseLine.Sym	cmp #'.'			Local Label?
					bne SRC.ParseLine.SymG
					
					jsr SRC.GetNextToken
					bcs
					jsr SRC.IsNumber
					bcs SRC.ParseLine.Err1
 
SRC.ParseLine.SymG	
					jsr SRC.GetToken
					jsr SYM.ClearLocal
					
					
SRC.ParseLine.OpCode	
					jsr SRC.GetNextCharNB
					beq .8
					
.8					clc					
					rts
					
SRC.ParseLine.Err1	lda #ERR.INVALID.LABEL
					sec
					rts
*---------------------------------------
SRC.GetToken		
*---------------------------------------
SRC.GetNextCharNB	jsr SRC.GetNextChar
					beq .9
					cmp #' '
					beq SRC.GetNextCharNB
.9					rts
*---------------------------------------
SRC.GetNextChar		ldx SRC.BufPtr
					lda TmpBuffer256,x
					inc SRC.BufPtr
					and #$7f
					rts
*---------------------------------------
SYM.ClearLocal
					clc
					rts
*---------------------------------------
SYM.AddLocal		
					clc
					rts
*---------------------------------------
*---------------------------------------
SYM.AddGlobal
					clc
					rts
*---------------------------------------
SYM.Lookup	
					clc
					rts
*---------------------------------------
SYM.BLOCK.ALLOC		ldx #0
.1					lda SYM.BLOCKS,x
					beq .2
					inx
					cpx #SYM.BLOCK.MAX
					bne .1				
					lda #ERR.SYM.TOO.LARGE
					sec 				Out of block error
					rts
					
.2					phx					Save next free block
					>LDYA SYM.BLOCK.SIZE
					>SYSCALL SYS.GetMem
					bcs .9
					txa
					plx
					sta SYM.BLOCKS,x
					clc
.9					rts		
*---------------------------------------
CS.END
T.DIRECTIVES		.AS "AS"
					.AS "AT"
					.AS "AZ"
					.AS "BS"
					.AS "DA"
					.AS "DO"
					.AS "DU"
					.AS "ED"
					.AS "EL"
					.AS "EN"
					.AS "EP"
					.AS "EQ"
					.AS "FI"
					.AS "HS"
					.AS "IN"
					.AS "LI"
					.AS "MA"
					.AS "OP"
					.AS "OR"
					.AS "PG"
					.AS "PH"
					.AS "TA"
					.AS "TF"
					.AS "TI"
					.AS "US"
T.DIRECTIVES.END	.EQ *					
*---------------------------------------
LIBSTR				>PSTRING "libstr.o"
MSG.HELP1			>CSTRING "A2osX-Macro Assembler (S-C MASM 2.0 Based)\n"
MSG.HELP2			>CSTRING "Usage : ASM <src file> [type TXT ($04) or S-C/BAS ($FA)]\n"
MSG.SRCLINE			>CSTRING "%05D-%s\n"
hLIBSTR				.BS	1
hFileName			.BS 1
SRC.LINENUM			.BS 2
SRC.BufPtr			.BS 1
SRC.Token			.BS	256
READ.BUFFER			.BS 256
*--------------------------------------
					.DUMMY
					.OR 0
DS.START				
bSTOP				.BS 1
bCANCEL				.BS 1

SRC.COUNT			.BS 1
SRC.hREFNUMS		.BS SRC.IN.DEPTH.MAX	Store ref_num of opened files (Main, .INs & .INBs)
SRC.hBUFFERS		.BS SRC.IN.DEPTH.MAX	Store hMem to allocated buffers
SRC.hFILETYPES		.BS SRC.IN.DEPTH.MAX	Store file type of opened SRC files

DST.hFILENAME		.BS 1
DST.hFILETYPE		.BS 1
DST.hREFNUM			.BS 1
DST.hBUFFER			.BS 1

ASM.T.hFILENAME		.BS 1
ASM.T.hFILE			.BS 1				handle to loaded ASM.T.xxxxx
ASM.PASS			.BS 1
ASM.ORG				.BS 4				32Bits Origin

SYM.BLOCKS			.BS SYM.BLOCK.MAX
DS.END				.ED
*---------------------------------------
MAN
SAVE BIN/ASM.S
ASM