mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2024-12-02 12:52:03 +00:00
c8cac53c5e
Massive updates that changes the way most subroutines are handled. Major bugfixes, various utilities added, started higher-level libraries.
96 lines
1.9 KiB
Plaintext
96 lines
1.9 KiB
Plaintext
AGET81
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PLA
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STA RETADR
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PLA
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STA RETADR+1
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PLA
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STA :IDX
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PLA
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STA ADDR1
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PLA
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STA ADDR1+1
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LDA #0
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STA :IDX+1
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LDA RETADR+1
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PHA
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LDA RETADR
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PHA
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LDY #1
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LDA (ADDR1),Y
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STA :ESIZE
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STA RETLEN
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DEY
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LDA (ADDR1),Y
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STA :ALEN
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LDA ERRCTRL
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CMP #1
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BEQ :CHKERR
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JMP :ERREND
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:CHKERR
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LDA :IDX
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CMP :ALEN
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BCS :OVF
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JMP :ERREND
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:OVF
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_ERR #:E_SID;#:E_OVF1;#:E_DUMP;#:RES;#6
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:ERREND
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LDY #0
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LDA #0
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TAY
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STY SCRATCH
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BEQ :ENTLP
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:DOADD
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CLC
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ADC :IDX
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TAX
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TYA
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ADC SCRATCH
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TAY
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TXA
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:LP
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ASL :IDX
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ROL SCRATCH
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:ENTLP
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LSR :ESIZE
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BCS :DOADD
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BNE :LP
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STX :IDX
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STY :IDX+1
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CLC
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LDA #2
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ADC :IDX
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STA :RES
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LDA #0
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ADC :IDX+1
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STA :RES+1
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CLC
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LDA :RES
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ADC ADDR1
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STA :RES
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LDA :RES+1
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ADC ADDR1+1
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STA :RES+1
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LDY #0
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LDA :RES
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STA ADDR1
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LDA :RES+1
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STA ADDR1+1
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:LDLOOP
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LDA (ADDR1),Y
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STA RETURN,Y
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INY
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CPY RETLEN
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BCC :LDLOOP
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BEQ :LDLOOP
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LDY :RES
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LDX :RES+1
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LDA RETLEN
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RTS
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:RES DS 2
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:IDX DS 2
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:ESIZE DS 1
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:ALEN DS 1
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:E_SID ASC "AGET81 (GET81 MACRO)",00
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:E_DUMP ASC "DUMPING RES(2) IDX(2) ESIZE(1) ALEN(1)",00
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:E_OVF1 ASC "OUT OF BOUNDS! INDEX > ARRAY LENGTH",00
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