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.
67 lines
1.4 KiB
Plaintext
67 lines
1.4 KiB
Plaintext
TVLINE
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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 :F
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PLA
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STA :X
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PLA
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STA :Y2
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PLA
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STA :Y1
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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 :Y1
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CMP :Y2
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BCS :ERRTOOHI
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LDA :Y2
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CMP #24
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BCS :ERRYOVF
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LDA :X
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CMP #40
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BCS :ERRXOVF
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LDA :Y1
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CMP #24
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BCS :ERRYOVF
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JMP :ERREND
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:ERRTOOHI
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_ERR #:E_SID;#:E_YHI;#:E_DMP1;#:X;#4
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JMP :ERREND
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:ERRXOVF
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_ERR #:E_SID;#:E_XOF;#:E_DMP1;#:X;#4
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JMP :ERREND
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:ERRYOVF
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_ERR #:E_SID;#:E_YOF;#:E_DMP1;#:X;#4
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JMP :ERREND
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:ERREND
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LDA :Y1
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LDY :X
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:LOOP
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JSR $F847
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LDA :F
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STA ($26),Y
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INC :Y1
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LDA :Y1
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CMP :Y2
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BNE :LOOP ; LOOP
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:EXIT
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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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RTS
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:X DS 1
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:Y1 DS 1
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:Y2 DS 1
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:F DS 1
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:E_SID ASC "TVLINE (TVLIN MACRO)",00
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:E_DMP1 ASC "DUMPING X(1) Y1(1) Y2(1) F(1)",00
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:E_YHI ASC "Y1 MUST BE LOWER THAN Y2.",00
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:E_XOF ASC "X > # OF AVAILABLE COLUMNS.",00
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:E_YOF ASC "Y > # OF AVAILABLE ROWS",00
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