goapple2/source/applesoft/S.DACF

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2014-05-10 00:59:16 +00:00
1010 *--------------------------------
1020 PR.STRING
1030 JSR STRPRT
1040 JSR CHRGOT
1050 *--------------------------------
1060 * "PRINT" STATEMENT
1070 *--------------------------------
1080 PRINT BEQ CRDO NO MORE LIST, PRINT <RETURN>
1090 *--------------------------------
1100 PRINT2 BEQ RTS.8 NO MORE LIST, DON'T PRINT <RETURN>
1110 CMP #TOKEN.TAB
1120 BEQ PR.TAB.OR.SPC C=1 FOR TAB(
1130 CMP #TOKEN.SPC
1140 CLC
1150 BEQ PR.TAB.OR.SPC C=0 FOR SPC(
1160 CMP #','
1170 CLC <<< NO PURPOSE TO THIS >>>
1180 BEQ PR.COMMA
1190 CMP #';'
1200 BEQ PR.NEXT.CHAR
1210 JSR FRMEVL EVALUATE EXPRESSION
1220 BIT VALTYP STRING OR FP VALUE?
1230 BMI PR.STRING STRING
1240 JSR FOUT FP: CONVERT INTO BUFFER
1250 JSR STRLIT MAKE BUFFER INTO STRING
1260 JMP PR.STRING PRINT THE STRING
1270 *--------------------------------
1280 CRDO LDA #$0D PRINT <RETURN>
1290 JSR OUTDO
1300 NEGATE EOR #$FF <<< WHY??? >>>
1310 RTS.8 RTS
1320 *--------------------------------
1330 * TAB TO NEXT COMMA COLUMN
1340 * <<< NOTE BUG IF WIDTH OF WINDOW LESS THAN 33 >>>
1350 PR.COMMA
1360 LDA MON.CH
1370 CMP #24 <<< BUG: IT SHOULD BE 32 >>>
1380 BCC .1 NEXT COLUMN, SAME LINE
1390 JSR CRDO FIRST COLUMN, NEXT LINT
1400 BNE PR.NEXT.CHAR ...ALWAYS
1410 .1 ADC #16
1420 AND #$F0 ROUND TO 16 OR 32
1430 STA MON.CH
1440 BCC PR.NEXT.CHAR ...ALWAYS
1450 *--------------------------------
1460 PR.TAB.OR.SPC
1470 PHP C=0 FOR SPC(, C=1 FOR TAB(
1480 JSR GTBYTC GET VALUE
1490 CMP #')' TRAILING PARENTHESIS
1500 BEQ .1 GOOD
1510 JMP SYNERR NO, SYNTAX ERROR
1520 .1 PLP TAB( OR SPC(
1530 BCC .2 SPC(
1540 DEX TAB(
1550 TXA CALCULATE SPACES NEEDED FOR TAB(
1560 SBC MON.CH
1570 BCC PR.NEXT.CHAR ALREADY PAST THAT COLUMN
1580 TAX NOW DO A SPC( TO THE SPECIFIED COLUMN
1590 .2 INX
1600 NXSPC DEX
1610 BNE DOSPC MORE SPACES TO PRINT
1620 *--------------------------------
1630 PR.NEXT.CHAR
1640 JSR CHRGET
1650 JMP PRINT2 CONTINUE PARSING PRINT LIST
1660 *--------------------------------
1670 DOSPC JSR OUTSP
1680 BNE NXSPC ...ALWAYS
1690 *--------------------------------
1700 * PRINT STRING AT (Y,A)
1710 STROUT JSR STRLIT MAKE (Y,A) PRINTABLE
1720 *--------------------------------
1730 * PRINT STRING AT (FACMO,FACLO)
1740 *--------------------------------
1750 STRPRT JSR FREFAC GET ADDRESS INTO INDEX, (A)=LENGTH
1760 TAX USE X-REG FOR COUNTER
1770 LDY #0 USE Y-REG FOR SCANNER
1780 INX
1790 .1 DEX
1800 BEQ RTS.8 FINISHED
1810 LDA (INDEX),Y NEXT CHAR FROM STRING
1820 JSR OUTDO PRINT THE CHAR
1830 INY
1840 * <<< NEXT THREE LINES ARE USELESS >>>
1850 CMP #$0D WAS IT <RETURN>?
1860 BNE .1 NO
1870 JSR NEGATE EOR #$FF WOULD DO IT, BUT WHY?
1880 * <<< ABOVE THREE LINES ARE USELESS >>>
1890 JMP .1
1900 *--------------------------------
1910 OUTSP LDA #' ' PRINT A SPACE
1920 .HS 2C SKIP OVER NEXT LINE
1930 OUTQUES LDA #'?' PRINT QUESTION MARK
1940 *--------------------------------
1950 * PRINT CHAR FROM (A)
1960 *
1970 * NOTE: POKE 243,32 ($20 IN $F3) WILL CONVERT
1980 * OUTPUT TO LOWER CASE. THIS CAN BE CANCELLED
1990 * BY NORMAL, INVERSE, OR FLASH OR POKE 243,0.
2000 *--------------------------------
2010 OUTDO ORA #$80 PRINT (A)
2020 CMP #$A0 CONTROL CHR?
2030 BCC .1 SKIP IF SO
2040 ORA FLASH.BIT =$40 FOR FLASH, ELSE $00
2050 .1 JSR MON.COUT "AND"S WITH $3F (INVERSE), $7F (FLASH)
2060 AND #$7F
2070 PHA
2080 LDA SPEEDZ COMPLEMENT OF SPEED #
2090 JSR MON.WAIT SO SPEED=255 BECOMES (A)=1
2100 PLA
2110 RTS
2120 *--------------------------------
2130 * INPUT CONVERSION ERROR: ILLEGAL CHARACTER
2140 * IN NUMERIC FIELD. MUST DISTINGUISH
2150 * BETWEEN INPUT, READ, AND GET
2160 *--------------------------------
2170 INPUTERR
2180 LDA INPUTFLG
2190 BEQ RESPERR TAKEN IF INPUT
2200 BMI READERR TAKEN IF READ
2210 LDY #$FF FROM A GET
2220 BNE ERLIN ...ALWAYS
2230 *--------------------------------
2240 READERR
2250 LDA DATLIN TELL WHERE THE "DATA" IS, RATHER
2260 LDY DATLIN+1 THAN THE "READ"
2270 *--------------------------------
2280 ERLIN STA CURLIN
2290 STY CURLIN+1
2300 JMP SYNERR
2310 *--------------------------------
2320 INPERR PLA
2330 *--------------------------------
2340 RESPERR
2350 BIT ERRFLG "ON ERR" TURNED ON?
2360 BPL .1 NO, GIVE REENTRY A TRY
2370 LDX #254 ERROR CODE = 254
2380 JMP HANDLERR
2390 .1 LDA #ERR.REENTRY "?REENTER"
2400 LDY /ERR.REENTRY
2410 JSR STROUT
2420 LDA OLDTEXT RE-EXECUTE THE WHOLE INPUT STATEMENT
2430 LDY OLDTEXT+1
2440 STA TXTPTR
2450 STY TXTPTR+1
2460 RTS
2470 *--------------------------------
2480 * "GET" STATEMENT
2490 *--------------------------------
2500 GET JSR ERRDIR ILLEGAL IF IN DIRECT MODE
2510 LDX #INPUT.BUFFER+1 SIMULATE INPUT
2520 LDY /INPUT.BUFFER+1
2530 LDA #0
2540 STA INPUT.BUFFER+1
2550 LDA #$40 SET UP INPUTFLG
2560 JSR PROCESS.INPUT.LIST <<< CAN SAVE 1 BYTE HERE>>>
2570 RTS <<<BY "JMP PROCESS.INPUT.LIST">>>
2580 *--------------------------------
2590 * "INPUT" STATEMENT
2600 *--------------------------------
2610 INPUT CMP #'"' CHECK FOR OPTIONAL PROMPT STRING
2620 BNE .1 NO, PRINT "?" PROMPT
2630 JSR STRTXT MAKE A PRINTABLE STRING OUT OF IT
2640 LDA #';' MUST HAVE ; NOW
2650 JSR SYNCHR
2660 JSR STRPRT PRINT THE STRING
2670 JMP .2
2680 .1 JSR OUTQUES NO STRING, PRINT "?"
2690 .2 JSR ERRDIR ILLEGAL IF IN DIRECT MODE
2700 LDA #',' PRIME THE BUFFER
2710 STA INPUT.BUFFER-1
2720 JSR INLIN
2730 LDA INPUT.BUFFER
2740 CMP #$03 CONTROL C?
2750 BNE INPUT.FLAG.ZERO NO
2760 JMP CONTROL.C.TYPED
2770 *--------------------------------
2780 NXIN JSR OUTQUES PRINT "?"
2790 JMP INLIN
2800 *--------------------------------
2810 * "READ" STATEMENT
2820 *--------------------------------
2830 READ LDX DATPTR Y,X POINTS AT NEXT DATA STATEMENT
2840 LDY DATPTR+1
2850 LDA #$98 SET INPUTFLG = $98
2860 .HS 2C TRICK TO PROCESS.INPUT.LIST
2870 *--------------------------------
2880 INPUT.FLAG.ZERO
2890 LDA #0 SET INPUTFLG = $00
2900 *--------------------------------
2910 * PROCESS INPUT LIST
2920 *
2930 * (Y,X) IS ADDRESS OF INPUT DATA STRING
2940 * (A) = VALUE FOR INPUTFLG: $00 FOR INPUT
2950 * $40 FOR GET
2960 * $98 FOR READ
2970 *--------------------------------
2980 PROCESS.INPUT.LIST
2990 STA INPUTFLG
3000 STX INPTR ADDRESS OF INPUT STRING
3010 STY INPTR+1
3020 *--------------------------------
3030 PROCESS.INPUT.ITEM
3040 JSR PTRGET GET ADDRESS OF VARIABLE
3050 STA FORPNT
3060 STY FORPNT+1
3070 LDA TXTPTR SAVE CURRENT TXTPTR,
3080 LDY TXTPTR+1 WHICH POINTS INTO PROGRAM
3090 STA TXPSV
3100 STY TXPSV+1
3110 LDX INPTR SET TXTPTR TO POINT AT INPUT BUFFER
3120 LDY INPTR+1 OR "DATA" LINE
3130 STX TXTPTR
3140 STY TXTPTR+1
3150 JSR CHRGOT GET CHAR AT PNTR
3160 BNE INSTART NOT END OF LINE OR COLON
3170 BIT INPUTFLG DOING A "GET"?
3180 BVC .1 NO
3190 JSR MON.RDKEY YES, GET CHAR
3200 AND #$7F
3210 STA INPUT.BUFFER
3220 LDX #INPUT.BUFFER-1
3230 LDY /INPUT.BUFFER-1
3240 BNE .2 ...ALWAYS
3250 *--------------------------------
3260 .1 BMI FINDATA DOING A "READ"
3270 JSR OUTQUES DOING AN "INPUT", PRINT "?"
3280 JSR NXIN PRINT ANOTHER "?", AND INPUT A LINE
3290 .2 STX TXTPTR
3300 STY TXTPTR+1
3310 *--------------------------------
3320 INSTART
3330 JSR CHRGET GET NEXT INPUT CHAR
3340 BIT VALTYP STRING OR NUMERIC?
3350 BPL .5 NUMERIC
3360 BIT INPUTFLG STRING -- NOW WHAT INPUT TYPE?
3370 BVC .1 NOT A "GET"
3380 INX "GET"
3390 STX TXTPTR
3400 LDA #0
3410 STA CHARAC NO OTHER TERMINATORS THAN $00
3420 BEQ .2 ...ALWAYS
3430 *--------------------------------
3440 .1 STA CHARAC
3450 CMP #'"' TERMINATE ON $00 OR QUOTE
3460 BEQ .3
3470 LDA #':' TERMINATE ON $00, COLON, OR COMMA
3480 STA CHARAC
3490 LDA #','
3500 .2 CLC
3510 .3 STA ENDCHR
3520 LDA TXTPTR
3530 LDY TXTPTR+1
3540 ADC #0 SKIP OVER QUOTATION MARK, IF
3550 BCC .4 THERE WAS ONE
3560 INY
3570 .4 JSR STRLT2 BUILD STRING STARTING AT (Y,A)
3580 * TERMINATED BY $00, (CHARAC), OR (ENDCHR)
3590 JSR POINT SET TXTPTR TO POINT AT STRING
3600 JSR PUTSTR STORE STRING IN VARIABLE
3610 JMP INPUT.MORE
3620 *--------------------------------
3630 .5 PHA
3640 LDA INPUT.BUFFER ANYTHING IN BUFFER?
3650 BEQ INPFIN NO, SEE IF READ OR INPUT
3660 *--------------------------------
3670 INPUT.DATA
3680 PLA "READ"
3690 JSR FIN GET FP NUMBER AT TXTPTR
3700 LDA VALTYP+1
3710 JSR LET2 STORE RESULT IN VARIABLE
3720 *--------------------------------
3730 INPUT.MORE
3740 JSR CHRGOT
3750 BEQ .1 END OF LINE OR COLON
3760 CMP #',' COMMA IN INPUT?
3770 BEQ .1 YES
3780 JMP INPUTERR NOTHING ELSE WILL DO
3790 .1 LDA TXTPTR SAVE POSITION IN INPUT BUFFER
3800 LDY TXTPTR+1
3810 STA INPTR
3820 STY INPTR+1
3830 LDA TXPSV RESTORE PROGRAM POINTER
3840 LDY TXPSV+1
3850 STA TXTPTR
3860 STY TXTPTR+1
3870 JSR CHRGOT NEXT CHAR FROM PROGRAM
3880 BEQ INPDONE END OF STATEMENT
3890 JSR CHKCOM BETTER BE A COMMA THEN
3900 JMP PROCESS.INPUT.ITEM
3910 *--------------------------------
3920 INPFIN LDA INPUTFLG "INPUT" OR "READ"
3930 BNE INPUT.DATA "READ"
3940 JMP INPERR
3950 *--------------------------------
3960 FINDATA
3970 JSR DATAN GET OFFSET TO NEXT COLON OR EOL
3980 INY TO FIRST CHAR OF NEXT LINE
3990 TAX WHICH: EOL OR COLON?
4000 BNE .1 COLON
4010 LDX #ERR.NODATA EOL: MIGHT BE OUT OF DATA
4020 INY CHECK HI-BYTE OF FORWARD PNTR
4030 LDA (TXTPTR),Y END OF PROGRAM?
4040 BEQ GERR YES, WE ARE OUT OF DATA
4050 INY PICK UP THE LINE #
4060 LDA (TXTPTR),Y
4070 STA DATLIN
4080 INY
4090 LDA (TXTPTR),Y
4100 INY POINT AT FIRST TEXT CHAR IN LINE
4110 STA DATLIN+1
4120 .1 LDA (TXTPTR),Y GET 1ST TOKEN OF STATEMENT
4130 TAX SAVE TOKEN IN X-REG
4140 JSR ADDON ADD (Y) TO TXTPTR
4150 CPX #TOKEN.DATA DID WE FIND A "DATA" STATEMENT?
4160 BNE FINDATA NOT YET
4170 JMP INSTART YES, READ IT
4180 *---NO MORE INPUT REQUESTED------
4190 INPDONE
4200 LDA INPTR GET POINTER IN CASE IT WAS "READ"
4210 LDY INPTR+1
4220 LDX INPUTFLG "READ" OR "INPUT"?
4230 BPL .1 "INPUT"
4240 JMP SETDA "DATA", SO STORE (Y,X) AT DATPTR
4250 .1 LDY #0 "INPUT": ANY MORE CHARS ON LINE?
4260 LDA (INPTR),Y
4270 BEQ .2 NO, ALL IS WELL
4280 LDA #ERR.EXTRA YES, ERROR
4290 LDY /ERR.EXTRA "EXTRA IGNORED"
4300 JMP STROUT
4310 .2 RTS
4320 *--------------------------------
4330 ERR.EXTRA
4340 .AS '?EXTRA IGNORED'
4350 .HS 0D00
4360 ERR.REENTRY
4370 .AS '?REENTER'
4380 .HS 0D00
4390 *--------------------------------