mirror of
https://github.com/A2osX/A2osX.git
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103 lines
2.9 KiB
Plaintext
103 lines
2.9 KiB
Plaintext
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NEW
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AUTO 3,1
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*--------------------------------------
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* PARSE LINE RANGE
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* START END CARRY
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* <EOL> (PP) (HI.MEM) SET
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* #<EOL> # # CLEAR
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* #1,#2<EOL> #1 #2 CLEAR
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* #, # (HI.MEM) CLEAR
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* ,# (PP) # CLEAR
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*---------------------------------
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PARSE.LINE.RANGE
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JSR SETUP.TEXT.POINTERS
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JSR GNNB.AUC GET NEXT NON-BLANK CHAR
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BCS .4 EOL, RETURN WITH CARRY SET
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BEQ .1 COMMA, SO START AT PP
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JSR SCAN.LINE.NUMBER
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BCS .5
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LDA LINE.START
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STA SRCP
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LDA LINE.START+1
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STA SRCP+1
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JSR GNNB.AUC GET NEXT NON-BLANK AFTER LINE NUMBER
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BCS .2 EOL, SO ONLY THIS ONE LINE
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BNE .5 NOT COMMA, SO ERROR
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.1 JSR GNNB.AUC GET NEXT NON-BLANK AFTER COMMA
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BCS .3 EOL, SO GO THRU HI.MEM
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BEQ .3 COMMA, SAME AS EOL
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JSR SCAN.LINE.NUMBER
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BCS .5
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.2 LDA LINE.END
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STA ENDP
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LDA LINE.END+1
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STA ENDP+1
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.3 CLC FLAG WE GOT AT LEAST ONE NUMBER
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.4 RTS
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.5 JMP SYNX
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*---------------------------------
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* SCAN INPUT LINE FOR DIGIT OR PERIOD
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* IF FIND DIGIT, CONVERT LINE NUMBER
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* AND SEARCH FOR IT
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* IF FIND PERIOD, SEARCH FOR <CURLNO>
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* IF NEITHER, RETURN WITH CARRY SET
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*---------------------------------
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SCAN.LINE.NUMBER
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CMP #'. DOT: USE (CURLNO)
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BEQ .1
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EOR #$30
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CMP #10
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BCS .2 NOT DOT NOR DIGIT, EXIT CARRY SET
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JSR DECN CONVERT THE NUMBER
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JSR BACKUP.CHAR.PNTR
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LDX #SYM.VALUE
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.HS 2C SKIP OVER NEXT 2 BYTES
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.1 LDX #CURLNO
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JSR SERTXT FIND LINE
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CLC SIGNAL GOOD NUMBER
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.2 RTS
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*--------------------------------
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* LOAD PP --> SRCP, HI.MEM --> ENDP
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*--------------------------------
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SETUP.TEXT.POINTERS
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LDA PP ASSUME PP THRU HI.MEM
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STA SRCP
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LDA PP+1
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STA SRCP+1
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LDA HI.MEM
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STA ENDP
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LDA HI.MEM+1
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STA ENDP+1
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RTS
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*--------------------------------
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CMP.SRCP.ENDP
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LDA SRCP
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CMP ENDP
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LDA SRCP+1
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SBC ENDP+1
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RTS
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*--------------------------------
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* GET NEXT NON-BLANK CHARACTER
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* AND CHECK FOR A, U, OR COMMA
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* SET CARRY IF A, U, OR EOL
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* SET EQ IF A, U, EOL, OR COMMA
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*--------------------------------
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GNNB.AUC
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JSR GNNB NEXT NON-BLANK, CONV LOWER TO UPPER
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BCS .1 EOL
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CMP #'A
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BEQ .1
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CMP #'U
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BEQ .1
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CMP #',
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CLC
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RTS
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.1 JSR BACKUP.CHAR.PNTR
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SEC
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RTS
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*--------------------------------------
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MAN
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SAVE usr/src/scmasm.30/scmasm.s.pline
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LOAD usr/src/scmasm.30/scmasm.s
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ASM
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