mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2024-11-27 12:49:27 +00:00
236 lines
4.6 KiB
Plaintext
236 lines
4.6 KiB
Plaintext
*
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JMP ENDVARS
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*
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*``````````````````````````````*
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* REQUIRED.LIB *
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*- -*
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* GLOBAL ROUTINES AND *
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* VARIABLES EITHER USED BY THE *
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* LIBRARY OR PROVIDED FOR DEMO *
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* USE OR DEBUGGING PURPOSES. *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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********************************
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* *
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* GLOBAL ROUTINES *
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* *
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********************************
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*
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*``````````````````````````````*
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* __GETRET: GET RETURN *
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*- -*
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* COPIES THE DATA IN [RETURN] *
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* TO THE SPECIFIED LOCATION. *
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* LENGTH IS DETERMINED BY *
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* VALUE OF RETLEN. *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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__GETRET
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*
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LDY #255
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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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*
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:LP
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INY
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LDA RETURN,Y
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STA (ADDR1),Y
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CPY RETLEN
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BNE :LP
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LDA ADDR1+1
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PHA
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LDA ADDR1
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PHA
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RTS
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*
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*``````````````````````````````*
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* __SETPARM: SET PARAMETER *
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*- -*
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* COPIES DATA FROM SPECIFIED *
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* ADDRESS TO THE [PARAM] *
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* LOCATION FOR PASSING TO *
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* A ROUTINE. *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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__SETPARM
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*
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LDY #255
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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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*
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:LP
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INY
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LDA (ADDR1),Y
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STA PARAM,Y
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CPY PARLEN
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BNE :LP
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LDA ADDR1+1
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PHA
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LDA ADDR1
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PHA
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RTS
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*
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*``````````````````````````````*
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* __DUMP: DUMP DATA *
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*- -*
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* OUTPUTS DATA LOCATED AT THE *
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* SPECIFIED ADDRESS IN HEX *
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* FORMAT FOR SPECIFIED NUMBER *
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* OF BYTES. *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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__DUMP
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*
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PLA
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STA :RET
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PLA
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STA :RET+1
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PLA
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STA :LENGTH
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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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*
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LDA #$8D
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JSR $FDF0
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LDA ADDR1+1
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AND #$F0
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LSR
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LSR
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LSR
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LSR
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TAX
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LDA :HEXTAB,X
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JSR $FDF0
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LDA ADDR1+1
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AND #$0F
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TAX
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LDA :HEXTAB,X
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JSR $FDF0
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LDA ADDR1
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AND #$F0
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LSR
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LSR
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LSR
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LSR
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TAX
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LDA :HEXTAB,X
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JSR $FDF0
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LDA ADDR1
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AND #$0F
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TAX
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LDA :HEXTAB,X
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JSR $FDF0
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LDA #186 ; :
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JSR $FDF0
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LDA #160 ; SPC
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JSR $FDF0
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*
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LDY #0
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:LP
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LDA (ADDR1),Y
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AND #$F0 ; MASK RIGHT
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LSR
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LSR
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LSR
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LSR
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STA :LEFT
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LDA (ADDR1),Y
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AND #$0F ; MASK LEFT
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STA :RIGHT
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LDX :LEFT
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LDA :HEXTAB,X
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JSR $FDF0
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LDX :RIGHT
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LDA :HEXTAB,X
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JSR $FDF0
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LDA #160
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JSR $FDF0
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INY
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CPY :LENGTH
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BNE :LP
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*
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*LDA #$8D
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*JSR $FDF0
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LDA :RET+1
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PHA
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LDA :RET
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PHA
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*
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RTS
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*
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:RET DS 2
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:RIGHT DS 1
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:LEFT DS 1
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:LENGTH DS 1
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:HEXTAB ASC "0123456789ABCDEF"
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*
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*``````````````````````````````*
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* __P: PRINT FOLLOWING ASC *
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*- -*
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* THIS IS THE XPRINT ROUTINE *
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* FROM STDIO.LIB, BUT STRIPPED *
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* OF COMMENTS. FOR DEBUG. *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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__P
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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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LDY #1
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:LP LDA (ADDR1),Y
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BEQ :DONE
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JSR $FDF0
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INY
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BNE :LP
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:DONE CLC
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TYA
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ADC ADDR1
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STA ADDR1
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LDA ADDR1+1
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ADC #0
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PHA
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LDA ADDR1
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PHA
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RTS
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*
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*``````````````````````````````*
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* __W: WAIT FOR KEYPRESS *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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__W
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JSR $FD0C
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RTS
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*
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********************************
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* *
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* GLOBAL VARIABLES *
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* *
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********************************
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*
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** 256 BYTES DEDICATED TO RETURN
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** VALUES OF VARIABLE LENGTH; CAN BE
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** MODIFIED TO SUIT SMALLER OR LARGER
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** NEEDS.
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*
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*
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RETLEN DS 1 ; RETURN VALUE BYTE LENGTH
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RETURN DS 256
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*
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** 256 BYTE VALUE DEDICATED TO LARGE
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** OR VARIABLE LENGTH PARAMETERS. THIS
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** CAN ALSO BE CHANGED TO FIT SMALLER OR
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** LARGER BOUNDS.
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*
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PARLEN DS 1
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PARAM DS 256
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*
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ENDVARS
|
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*
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