mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2024-11-30 15:49:55 +00:00
204 lines
4.1 KiB
Plaintext
204 lines
4.1 KiB
Plaintext
*``````````````````````````````*
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* CURSFOR :: MOVE CURSOR FORWD *
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*- -*
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* FLAGS: NZC----- REG: AYM- *
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* CYCLES: 20 *
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*- -*
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* USAGE: *
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* LDA (AMT TO MOVE) *
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* JSR CURSFOR *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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CURSFOR
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CLC
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ADC CURSH
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STA CURSH
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*
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********************************
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*
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** ERROR CONTROL
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*
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********************************
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*
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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 CURSH
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CMP #40 ; MAX COL + 1
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BCS :XOVF
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JMP :ERREND
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:XOVF
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_ERR :E_SID;:E_XOF;:E_DMP1;RETURN;#10
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*
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********************************
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*
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:ERREND
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*
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********************************
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*
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JSR VTAB
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RTS
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*
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** DATA
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*
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:E_SID ASC "CURSFOR (CURF MACRO)",00
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:E_DMP1 ASC "DUMPING RETURN BLOCK...",00
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:E_XOF ASC "CURSOR X OVERFLOW: X <> MIN/MAX",00
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*
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*``````````````````````````````*
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*CURSBAK :: MOVE CURSOR BACKWD *
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* *
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*- -*
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* FLAGS: NZC----- REG: AYM- *
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* CYCLES: 26 *
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*- -*
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* USAGE: *
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* LDA (AMT TO MOVE) *
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* JSR CURSBAK *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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CURSBAK
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SEC
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STA SCRATCH
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LDA CURSH
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SBC SCRATCH
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STA CURSH
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*
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********************************
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*
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** ERROR CONTROL
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*
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********************************
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*
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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 CURSH
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CMP #40 ; MIN COLUMN
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BCS :XOVF
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JMP :ERREND
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:XOVF
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_ERR :E_SID;:E_XOF;:E_DMP1;RETURN;#10
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*
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********************************
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*
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:ERREND
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*
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********************************
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*
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JSR VTAB
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RTS
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*
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** DATA
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*
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:E_SID ASC "CURSBAK (CURB MACRO)",00
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:E_DMP1 ASC "DUMPING RETURN BLOCK...",00
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:E_XOF ASC "CURSOR X OVERFLOW: X <> MIN/MAX",00
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*
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*``````````````````````````````*
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* CURSDN :: MOVE CURSOR DOWN *
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* *
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*- -*
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* FLAGS: NZC----- REG: AYM- *
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* CYCLES: 20 *
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*- -*
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* USAGE: *
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* LDA (AMT TO MOVE) *
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* JSR CURSDN *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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CURSDN
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CLC
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ADC CURSV
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STA CURSV
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*
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********************************
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*
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** ERROR CONTROL
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*
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********************************
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*
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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 CURSV
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CMP #24 ; MAX ROWS
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BCS :YOVF
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JMP :ERREND
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:YOVF
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_ERR :E_SID;:E_YOF;:E_DMP1;RETURN;#10
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*
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********************************
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*
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:ERREND
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*
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********************************
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*
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JSR VTAB
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RTS
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*
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** DATA
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*
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:E_SID ASC "CURSDN (CURD MACRO)",00
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:E_DMP1 ASC "DUMPING RETURN BLOCK...",00
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:E_YOF ASC "CURSOR Y OVERFLOW: Y <> MIN/MAX",00
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*
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*``````````````````````````````*
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* CURSUP :: MOVE CURSOR UP *
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* *
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*- -*
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* FLAGS: NZC----- REG: AYM- *
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* CYCLES: 26 *
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*- -*
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* USAGE: *
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* LDA (AMT TO MOVE) *
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* JSR CURSUP *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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CURSUP
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SEC
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STA SCRATCH
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LDA CURSV
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SBC SCRATCH
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STA CURSV
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*
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********************************
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*
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** ERROR CONTROL
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*
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********************************
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*
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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 CURSV
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CMP #24 ; MAX ROWS
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BCS :YOVF
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JMP :ERREND
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:YOVF
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_ERR :E_SID;:E_YOF;:E_DMP1;RETURN;#10
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*
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********************************
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*
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:ERREND
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*
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********************************
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*
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JSR VTAB
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RTS
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*
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** DATA
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*
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:E_SID ASC "CURSUP (CURU MACRO)",00
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:E_DMP1 ASC "DUMPING RETURN BLOCK...",00
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:E_YOF ASC "CURSOR Y OVERFLOW: Y <> MIN/MAX",00
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*
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