LDA (START),Y
           BNE GT.LBLCT
           LDY *SLAB+1
           BEQ END
GT.LBLCT   LDY #6
GL1        LSR *SLAB+1
           ROR A
           DEY
           BNE GL1
           STA *SLAB
           CMP *PLAB
           BNE BEGIN?
           LDA *SLAB+1
           CMP *PLAB+1
           BNE BEGIN?
           JMP OT.LNO
BEGIN?     LDA *PLAB+1
           BPL TO.EL
           AND #$7F
           STA *PLAB+1
           CMP *SLAB+1
           BNE CKLBLBUF
           LDA *PLAB
           CMP *SLAB
           BEQ OT.LIN
           BNE CKLBLBUF
TO.EL      JSR END.LIN
           LDA *LINCT
           AND #$F0
           CLC
           SED
           ADC #$10
           STA *LINCT
           LDA *LINCT+1
           ADC #0
           STA *LINCT+1
           CLD
CKLBLBUF   LDY #2
           LDA (LABADDR),Y
           BNE NTLBL+2
           JMP GR3
NTLBL      LDA (LABADDR),Y
           BMI NL1
           INY
           BNE NTLBL
NL1        TYA
           SEC
           ADC *LABADDR
           STA *LABADDR
           BCC NL2
           INC *LABADDR+1
NL2        INC *PLAB
           BNE NL3
           INC *PLAB+1
NL3        LDA *SLAB
           CMP *PLAB
           BNE CKLBLBUF
           LDA *SLAB+1
           CMP *PLAB+1
           BNE CKLBLBUF
           JSR CMPMEM
           BCC OT.LIN
           LDA #H,OT.LIN
           STA VEC+1
           LDA #L,OT.LIN
           STA VEC
           JMP GR2
OT.LIN     LDA *LINCT
           JSR OUTCHR
           LDA *LINCT+1
           JSR OUTCHR
           LDY #2
           LDA (LABADDR),Y
           CMP #'!
           BNE OT.LBL
           JSR OUTCHR
           JSR OUTCHR
           JSR OUTCHR
           INY
           INY
           INY
OT.LBL     LDA (LABADDR),Y
           BMI OT.ELBL
           JSR OUTCHR
           INY
           BNE OT.LBL
OT.ELBL    AND #$7F
           JSR OUTCHR
           JSR SPACE
           JSR SEMICON
           LDA #'$
           JSR OUTCHR
           LDY #1
           LDA (LABADDR),Y
           JSR OUTBYT
           DEY
           LDA (LABADDR),Y
           JSR OUTBYT
           JSR SPACE
           INC *LABCT
OT.LNO     DEC *LABCT
           BNE OTREF3
           JSR CR
           INC *LINCT
           LDA *LINCT
           AND #$F
           CMP #$A
           BCC OTREF1
           DEC *LINCT
OTREF1     JSR CMPMEM
           BCC OTREF2
           LDA #H,OTREF2
           STA VEC+1
           LDA #L,OTREF2
           STA VEC
           JMP GR2
OTREF2     LDA *LINCT
           JSR OUTCHR
           LDA *LINCT+1
           JSR OUTCHR
           JSR SPACE
           JSR SEMICON
           JSR SPC6
OTREF3     JSR SPC3
           LDY #1
           LDA (START),Y
           AND #$20
           BNE LIN.NDEF
           LDA #'#
LIN.NDEF   JSR OUTCHR
           BIT *FLAG
           BVS NOFILHD
           LDA (START),Y
           ORA #$40
           AND #$5F
           CLC
           ADC #1
           JSR OUTCHR
NOFILHD    INY
           LDA (START),Y
           JSR OUTBYT
           INY
           LDA (START),Y
           JSR OUTBYT
           LDA *START
           CLC
           ADC #4
           STA *START
           BCC NT.CODE
           INC *START+1
NT.CODE    JMP MO.LBLCO
CMPMEM     LDA *START
           SEC
           SBC *MEMPTR
           TAY
           LDA *START+1
           SBC *MEMPTR+1
           BNE CM1
           TYA
           CMP #$50
           BCC CM2
CM1        CLC
           RTS
CM2        LDA #0
           JSR OUTCHR
           LDY #2
           STA (MEMPTR),Y
           LDA *MEMPTR
           STA *TPRES
           LDA *MEMPTR+1
           STA *TPRES+1
           LDA *START
           STA TXEN
           LDA *START+1
           STA TXEN+1
           LDA TXST+1
           STA *MEMPTR+1
           LDA TXST
           STA *MEMPTR
           BNE CM3
           DEC *MEMPTR+1
CM3        DEC *MEMPTR
           SEC
           RTS
SEMICON    LDA #';
OUTCHR     INC *MEMPTR
           BNE OTCR1
           INC *MEMPTR+1
OTCR1      STY *TEMP
           LDY #0
           STA (MEMPTR),Y
           LDY *TEMP
           RTS
SPC6       JSR SPC3
SPC3       JSR SPACE
           JSR SPACE
SPACE      PHA
           LDA #$20
           JSR OUTCHR
           PLA
           RTS
CR         STY *TEMP
           PHA
           LDY #0
           LDA (MEMPTR),Y
           ORA #$80
           STA (MEMPTR),Y
           LDA #L/L
           STA *LABCT
           LDY *TEMP
           PLA
           RTS
OUTBYT     PHA
           PHA
           LSR A
           LSR A
           LSR A
           LSR A
           JSR NIBASC
           JSR OUTCHR
           PLA
           JSR NIBASC
           JSR OUTCHR
           PLA
           RTS
CONT.TAPE  JSR TAPEON1
           LDY #CTMSG2-CTMSG1
           JSR OTCTMSG
           LDA #0
           LDY #4
HD.ADDR    LDA TAPTAB-1,Y
           STA TSTART-1,Y
           DEY
           BNE HD.ADDR
           JSR U/LOAD
           BCC CALC
ERRMSG     LDY #CTMSG1-CTMSG1
           JSR OTCTMSG
           JSR MINCHR
           PHA
           JSR RCRLF
           PLA
           CMP #'Y
           BEQ CONT.TAPE
           CMP #'N
           BNE ERRMSG
           JSR TAPEOF1
           JMP RAENOMSG
CALC       LDA TXEN
           SEC
           SBC #3
           STA TEND
           STA *USER
           LDX TXEN+1
           BCS CALC1
           DEX
CALC1      STX TEND+1
           STX *USER+1
           CLC
           ADC HSTART
           PHP
           SEC
           SBC HEND
           STA TSTART
           TAY
           TXA
           SBC HEND+1
           PLP
           ADC HSTART+1
           STA TSTART+1
           CMP *PBUF+1
           BCS CALC3
CALC2      JMP GR2
CALC3      BNE CLREND
           CPY *PBUF
           BCC CALC2
CLREND     LDY #2
           LDA #0
CLE1       STA (USER),Y
           DEY
           BPL CLE1
           JSR U/LOAD
           BCS ERRMSG
           JSR TAPEOF1
           LDY #CTMSG3-CTMSG1
OTCTMSG    LDA CTMSG1,Y
           BEQ OCM1
           CMP #$A
           BEQ OCM2
           JSR ROUTCHR
           INY
           BNE OTCTMSG
OCM2       JSR RCRLF
           INY
           BNE OTCTMSG
OCM1       RTS
!!!MOVE    .MD (FROM TO)
           IFP FROM-$100
           LDA FROM
           ***
           IFM FROM-$100
           LDA *FROM
           ***
           STA *TO
           IFP FROM-$FF
           LDA FROM+1
           ***
           IFM FROM-$FF
           LDA *FROM+1
           ***
           STA *TO+1
           .ME
!!!NEXT    .MD (ADDRS)
...NEXT1   INY
           LDA (ADDRS),Y
           BPL ...NEXT1
           SEC
           TYA
           ADC *ADDRS
           STA *ADDRS
           BCC ...NEXT2
           INC *ADDRS+1
...NEXT2   .ME
SORT       MOVE (STST LBLPTR)
           LDY #2
           LDA (LBLPTR),Y
           BNE NEXTLBL
SAEND      RTS
NEXTLBL    LDY #1
           NEXT (LBLPTR)
           LDY #2
           LDA (LBLPTR),Y
           BEQ SAEND
           MOVE (STST CURPTR)
COMPARE    LDY #1
COMPARE1   INY
           LDA (CURPTR),Y
           BMI COMPARE2
           LDA (LBLPTR),Y
           BMI COMPARE3
           CMP (CURPTR),Y
           BCC INSERT
           BEQ COMPARE1
NEXTCUR    NEXT (CURPTR)
           LDA *CURPTR
           CMP *LBLPTR
           BNE COMPARE
           LDA *CURPTR+1
           CMP *LBLPTR+1
           BNE COMPARE
           BEQ NEXTLBL
COMPARE2   LDA (LBLPTR),Y
           ORA #$80
           .BY $2C
COMPARE3   AND #$7F
           CMP (CURPTR),Y
           BCC INSERT
           BNE NEXTCUR+1
           ASL A
           BCS NEXTCUR+1
INSERT     LDY #$FF
SAVE       INY
           LDA (LBLPTR),Y
           STA LBLBU,Y
           BPL SAVE
           CPY #2
           BCC SAVE
           LDX #0
           MOVE (LBLPTR TPTR)
           INY
INS1       LDA *TPTR
           BNE INS2
           DEC *TPTR+1
INS2       DEC *TPTR
           LDA (TPTR,X)
           STA (TPTR),Y
           LDA *TPTR
           CMP *CURPTR
           BNE INS1
           LDA *TPTR+1
           CMP *CURPTR+1
           BNE INS1
           DEY
           TYA
           TAX
INS3       LDA LBLBU,Y
           STA (TPTR),Y
           DEY
           BPL INS3
           TXA
           JMP NEXTLBL+9
END.LIN    LDA *LINCT
           AND #$F
           BNE EL1
           LDA *LABCT
           CMP #L/L
           BNE EL1
           JSR SPC3
           JSR SPACE
           LDA #'*
           LDY #4
EL2        DEY
           JSR OUTCHR
           BNE EL2
           BIT *FLAG
           BVS EL1
           JSR OUTCHR
EL1        JMP CR
MSG        .BY $4 $0 ' / = EXTERNAL          '
           .BY '# = LINE DEFINE' $C4
           .BY $6 $0 $89
           .BY $8 $0 'SYMBOL ;VALUE               '
           .BY 'CROSS-REFERENCE' $D3
MSGEND
PSE1       .BY 'ECB'
PSE2       .BY 'NTY'
CTMSG1     .BY $7 'TAPE LOAD ERROR' $D $A
           .BY 'TRY AGAIN (Y/N) ? ' 0
CTMSG2     .BY 'LOADING' $D $A $0
CTMSG3     .BY 'LOADED' $D $A $0
TAPTAB     .BY $28 $01 $2D $01
LBLBU      .DS 10
VEC        .DS 2
           .EN