NEW AUTO 3,1 *-------------------------------------- * SOFT INITIALIZATION *-------------------------------- SOFT LDA /$1000 START SYMBOL TABLE AT $1000 SYMBOL.BASE .EQ *-1 STA LO.MEM+1 LDA #0 STA LO.MEM STA AUTOLN.FLAG TURN OFF AUTOMATIC LINE NUMBERS JSR IO.WARM INIT SCREEN, CONNECT DOS JSR CLOSE.FILES *-------------------------------- FAST CLC SET TO FAST LISTING SPEED .HS 24 (SKIP OVER SEC) SLOW SEC SET TO SLOW LISTING SPEED ROR FLAG.SPEED SET/CLEAR SIGN BIT *-------------------------------- * GET NEXT LINE *-------------------------------- GNL LDX #$FF INIT STACK TXS STX PASS PASS=-1 IF NOT ASSEMBLING INX MAKE X=0 STX SCI.STATE GET INTO "IMMEDIATE" STATE STX RPTCNT CLEAR REPEAT COUNT STX MACRO.LEVEL STX PARAM.PNTR STX CHAR.PNTR STX PAGE.LENGTH TURN OFF TITLING JSR READ.LINE JSR GNC.UC.START GET FIRST CHAR OF LINE BEQ GNL EMPTY LINE OR 1ST CHAR IS BLANK JSR CHECK.LETTER BCC .1 NOT A LETTER JSR SEARCH.COMMAND.TABLE JMP GNL *---Test for single char cmds---- .1 LDY #CHARS.FOR.COMMANDS JSR SEARCH.CHAR.TABLES JMP GNL *---" LINE, ECHO ALL CHARS------- ECHO1 JSR CHO SEND CHARACTER ECHO.LINE JSR GNC GET NEXT CHAR BCC ECHO1 NOT END YET RTS *-------------------------------- * SYNTAX ERROR *-------------------------------- SYNX LDY #QSYNX JMP HARD.ERROR *-------------------------------- * NUMBERED LINE *-------------------------------- NML JSR GNC.START GET FIRST CHAR JSR DECN CONVERT LINE NUMBER LDA DGTCNT MUST BE 1 TO 5 DIGITS BEQ SYNX LDA SYM.VALUE+2 ORA SYM.VALUE+3 BNE SYNX > 65535 *---Compact the numbered line---- DEY Backup to previous character JSR COMPACT.LINE *-------------------------------- LDX #1 COPY IN BINARY LINE # .51 LDA SYM.VALUE,X STA CURLNO,X SAVE HERE TOO, FOR AUTO-NUMBER STA WBUF+1,X DEX BPL .51 *-------------------------------- * FIND LINE, OR PLACE WHERE IT SHOULD GO * LINE.START --> BEGINNING OF THIS LINE * LINE.END --> BEGINNING OF NEXT LINE *-------------------------------- LDX #SYM.VALUE POINT AT LINE NUMBER JSR SERTXT FIND IT IF THERE SEC GET LENGTH OF HOLE LDA LINE.END WILL ALWAYS BE LESS THAN 256 SBC LINE.START SEC SUBTRACT LENGTH OF NEW LINE SBC WBUF LINE SIZE BEQ .11 SAME SIZE EXACTLY STA MOVE.DISTANCE LDA #0 SBC #0 STA MOVE.DISTANCE+1 BCC .6 NEW LINE LONGER THAN HOLE *-------------------------------- * NEW LINE SHORTER THAN HOLE *-------------------------------- CLC COMPUTE TARGET TO MOVE UP TO LDA LINE.START ADC MOVE.DISTANCE STA A4L LDA LINE.START+1 ADC MOVE.DISTANCE+1 STA A4H JSR MOVE.TEXT.UP JMP .10 NOW HOLE IS RIGHT SIZE *-------------------------------- * ENLARGE HOLE TO MAKE ROOM *-------------------------------- .6 CLC (MOVE.DISTANCE) = -<#BYTES TO EXPAND> LDA PP COMPUTE TARGET ADDRESS ADC MOVE.DISTANCE STA A4L LDA PP+1 ADC MOVE.DISTANCE+1 STA A4H LDA A4L BE SURE THERE IS ROOM CMP LO.MEM LDA A4H SBC LO.MEM+1 BCC MFER NO ROOM! JSR MOVE.TEXT.DOWN *---Adjust SRCP if needed-------- .10 LDA SRCP If hole is above (SRCP), CMP LINE.END then need to add MOVE.DISTANCE LDA SRCP+1 SBC LINE.END+1 BCS .11 LDA SRCP ADC MOVE.DISTANCE STA SRCP LDA SRCP+1 ADC MOVE.DISTANCE+1 STA SRCP+1 *-------------------------------- * COPY NEW LINE INTO THE HOLE *-------------------------------- .11 LDX WBUF LINE SIZE BEQ .14 NO NEW LINE TO COPY LDY #0 .12 LDA LINE.END BACK UP POINTER TO END OF HOLE BNE .13 DEC LINE.END+1 .13 DEC LINE.END DEX LDA WBUF,X STA (LINE.END),Y TXA BNE .12 .14 RTS *-------------------------------- MFER LDY #QMEMFL MEM FULL ERROR JMP HARD.ERROR *-------------------------------- COMPACT.LINE LDX #4 Start storing at WBUF+3 LDA #-1 Prime RPT pump STA RPTCNT .1 STA RPTCHR .2 INY advance input pointer INC RPTCNT (first time makes it = 0) LDA WBUF,Y get next char AND #$7F be sure its low ascii CMP RPTCHR save as previous char? BEQ .2 ...yes, just count it PHA save new character *-------------------------------- LDA RPTCNT BEQ .3 JSR PROCESS.REPEAT.COUNT *-------------------------------- .3 PLA get new character BNE .1 ...not 00 terminator STA WBUF-1,X store terminator CPX #5 If only line number, make length 00 BCS .4 LDX #0 .4 STX WBUF RTS *-------------------------------- PROCESS.REPEAT.COUNT LDA RPTCHR CMP #' ' BEQ .5 ...compress blanks in special way LDA RPTCNT CMP COMPRESSION.LIMIT BCS .2 ...enough to compress to 3 bytes .1 LDA RPTCHR spit out uncompressed chars STA WBUF-1,X INX DEC RPTCNT BNE .1 RTS *---Compress $C0 cnt char-------- .2 STA WBUF,X store count LDA #$C0 Compression token STA WBUF-1,X INX INX LDA RPTCHR repeated char .3 STA WBUF-1,X INX LDA #0 STA RPTCNT RTS *---Compress blanks-------------- .4 SBC #$3F Maximum blanks in one token STA RPTCNT LDA #$BF $3F blanks STA WBUF-1,X INX .5 LDA RPTCNT Number of blanks left CMP #$40 BCS .4 ...too many for one token ORA #$80 make into blank token + count BNE .3 ...always *-------------------------------- SCAN.3.DECIMAL.NUMBERS LDX #6 FIRST CLEAR TO ZERO LDA #0 .1 STA A0L-1,X DEX BNE .1 JSR SCAN.1.DECIMAL.NUMBER JSR SCAN.1.DECIMAL.NUMBER *** JMP SCAN.1.DECIMAL.NUMBER *-------------------------------- SCAN.1.DECIMAL.NUMBER .1 JSR GNC BCS .2 END OF LINE EOR #$30 IS THIS A DIGIT? CMP #10 BCS .1 NO TXA SAVE X-REG PHA JSR DECN CONVERT NUMBER PLA RESTORE X-REG TAX LDA SYM.VALUE STACK NUMBER STA A0L,X INX LDA SYM.VALUE+1 STA A0L,X INX .2 RTS *-------------------------------- * DECIMAL NUMBER INPUT *-------------------------------- DECN JSR BACKUP.CHAR.PNTR JSR ZERO.SYM.VALUE CLEAR ACCUMULATOR STA DGTCNT .1 JSR GNC GET NEXT CHAR EOR #$30 CHECK IF DIGIT CMP #10 BCS .5 NOT A DIGIT PHA SAVE THE DIGIT *---ACCUMULATOR * TEN------------ JSR ASL.SYM.VALUE BCS .6 OVERFLOW ERROR LDX #3 .2 LDA SYM.VALUE,X HI- TO LO- PHA DEX BPL .2 .3 JSR ASL.SYM.VALUE BCS .6 OVERFLOW ERROR INX BEQ .3 DO IT TWICE PLA ADC SYM.VALUE STA SYM.VALUE PLA ADC SYM.VALUE+1 STA SYM.VALUE+1 PLA ADC SYM.VALUE+2 STA SYM.VALUE+2 PLA ADC SYM.VALUE+3 STA SYM.VALUE+3 BCS .6 OVERFLOW ERROR *---ADD CURRENT DIGIT------------ PLA ADC SYM.VALUE STA SYM.VALUE BCC .4 INC SYM.VALUE+1 BNE .4 INC SYM.VALUE+2 BNE .4 INC SYM.VALUE+3 BEQ .6 OVERFLOW ERROR .4 INC DGTCNT COUNT THE DIGIT BNE .1 ...ALWAYS .5 RTS .6 LDY #QER3 RANGE ERROR JMP SOFT.ERROR *-------------------------------- * GET NEXT NON-BLANK CHAR *-------------------------------- GNNB JSR GNC.UC GET NEXT CHAR IN UPPER CASE BCS .1 END OF LINE BEQ GNNB BLANK .1 RTS RETURN *-------------------------------- * GET NEXT CHAR IN UPPER CASE *-------------------------------- GNC.UC.START LDY #0 STY CHAR.PNTR GNC.UC JSR GNC GET NEXT CHAR ANY CASE BEQ .1 SPACE OR JSR ELIMINATE.CASE MAP LOWER CASE TO UPPER CASE STA CURRENT.CHAR CMP #$FF CLEAR CARRY, SET .NE. .1 RTS *-------------------------------- * GET NEXT CHAR *-------------------------------- GNC.START LDY #0 BEGINNING OF LINE .HS 2C SKIP NEXT TWO BYTES GNC LDY CHAR.PNTR GNC2 LDA WBUF,Y GET CHAR AND #$7F STA CURRENT.CHAR BEQ .1 END OF LINE INY BUMP POINTER STY CHAR.PNTR CMP #$20 SEE IF BLANK CLC CARRY CLEAR SINCE NOT AT END RTS .1 LDA #$20 RETURN BLANK CMP #$20 SET CARRY AND EQUAL STATUS RTS *-------------------------------- * BACK UP CHARACTER POINTER *-------------------------------- BACKUP.CHAR.PNTR PHA SAVE A-REG LDA CURRENT.CHAR BEQ .1 DO NOT BACK OFF THE END LDA CHAR.PNTR BEQ .1 DO NOT BACK BEYOND THE BEGINNING DEC CHAR.PNTR .1 PLA RTS *-------------------------------- * GET NEXT TOKEN FROM SOURCE LINE *-------------------------------- NTKN LDA RPTCNT BNE .3 IN A REPEATED CHAR LOOP JSR GNB GET NEXT CHAR FROM SOURCE ASL ...WEIRD WAY TO TEST SIGN BIT ROR ...AND AS WELL AS 00 BPL .4 ...NORMAL CHARACTER CMP #$C0 SEE IF BLANKS BCC .1 ...YES JSR GNBI REPEAT TOKEN $C0 XX YY, GET XX STA RPTCNT JSR GNBI GET YY (CHAR TO BE REPEATED) JMP .2 ...ALWAYS .1 AND #$3F BLANK COUNT STA RPTCNT LDA #$20 BLANK .2 STA RPTCHR .3 DEC RPTCNT LDA RPTCHR .4 RTS *-------------------------------- * GET NEXT BYTE FROM SOURCE *-------------------------------- GNB LDY #0 GNBI .DO AUXMEM LDA MACRO.LEVEL BEQ .0 ...NOT IN A SKELETON >SYM LDA,SRCP .HS 2C SKIP OVER LDA (SRCP),Y .FIN .0 LDA (SRCP),Y >INCD SRCP BIT INFLAG INSIDE BLOCKED .IN? BVC .3 ...NO PHA LDA MACRO.LEVEL BNE .25 INSIDE A SKELETON LDA INSAVE+4 REMAINING BYTES IN THIS BLOCK BNE .2 ...THERE ARE MORE ORA INSAVE+5 BEQ .4 ...NO MORE IN THIS BLOCK DEC INSAVE+5 .2 DEC INSAVE+4 .25 PLA .3 RTS *---TRY TO READ ANOTHER BLOCK---- .4 PLA LDA INSAVE+6 REFNUM OF INB FILE STA SCI.IOB.RW+1 LDA PP STARTING ADDRESS STA SRCP STA SCI.IOB.RW+2 LDA PP+1 STA SRCP+1 STA SCI.IOB.RW+3 SEC LDA HI.MEM+1 NUMBER OF PAGES SBC PP+1 STA SCI.IOB.RW+5 LDA #0 STA SCI.IOB.RW+4 LDA #$CA READ JSR SCI.MLI BCC .5 ...NO ERRORS CMP #5 END OF DATA? BNE PRODOS.ERROR ...ERROR .5 LDA SCI.IOB.RW+6 STA INSAVE+4 # BYTES ACTUALLY READ LDA SCI.IOB.RW+7 STA INSAVE+5 BCC GNB ...NOT END OF DATA LDA INSAVE+6 REFNUM STA SCI.IOB.CLOSE+1 FOR CLOSE CALL LDA #$CC JSR SCI.MLI BCS PRODOS.ERROR JSR RESTORE END OF THE INBx FILE JMP ASM2 *-------------------------------- PRODOS.ERROR PHA JSR RESTORE.IF.IN.INBX PLA JMP SCI.ERROR *-------------------------------- * RETURN .CS. IF VALID CHAR * .CC. IF INVALID CHAR *-------------------------------- CHECK.DOT.DIGIT.OR.LETTER CMP #'. BEQ CHECKS.OK CMP #'_' allow underline in symbols too BEQ CHECKS.OK CHECK.DIGIT.OR.LETTER JSR CHECK.DIGIT BCS CHECKS.OK CHECK.LETTER CMP #'A BCC CHECKS.NOT.OK CMP #'Z+1 BCC CHECKS.OK CHECKS.NOT.OK CLC RTS CHECK.DIGIT CMP #'0 BCC CHECKS.NOT.OK CMP #'9+1 BCS CHECKS.NOT.OK CHECKS.OK SEC RTS *-------------------------------- CHECK.COMMENT.CHAR CMP #'* STAR? BEQ .1 YES CMP #'; SEMI-COLON? .1 RTS *-------------------------------- * INITIALIZE FOR HARD ENTRY *-------------------------------- HARD.INIT CLD *---Establish LO.MEM & HI.MEM------ LDA SYMBOL.BASE SET UP LO.MEM STA LO.MEM+1 LDA SCI.HIMEM.PAGE STA HI.MEM+1 LDA #0 STA LO.MEM STA HI.MEM *---Init other parameters-------- STA INCREMENT.VALUE+1 STA PROMPT.FLAG STA INFLAG JSR STINIT INITIALIZE SYMBOL TABLE LDA #10 SET AUTO-LINE-NUMBERING INCREMENT STA INCREMENT.VALUE LDA #990 SET AUTO-LINE-NUMBERING STA CURLNO INITIAL VALUE LDA /990 STA CURLNO+1 *---Print Heading---------------- JSR IO.INIT INIT TEXT, FULL WINDOW, ETC. JSR VERSION Print Version Number *-------------------------------- EMPTY.SOURCE.AREA LDA HI.MEM STA PP EMPTY SOURCE AREA LDA HI.MEM+1 STA PP+1 RTS *-------------------------------- Q.VERSION .DA #VERSION.LO+"0",#".",#VERSION.HI+"0" *-------------------------------------- MAN SAVE usr/src/scmasm.31/scmasm.s.edit LOAD usr/src/scmasm.31/scmasm.s ASM