mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2024-11-30 15:49:55 +00:00
468 lines
9.1 KiB
Plaintext
468 lines
9.1 KiB
Plaintext
*
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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 ADDR3
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PLA
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STA ADDR3+1
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*
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LDA #$8D
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JSR $FDF0
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LDA ADDR3+1
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AND #$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 ADDR3+1
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AND #$0F
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TAX
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LDA HEXTAB,X
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JSR $FDF0
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LDA ADDR3
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AND #$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 ADDR3
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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 $FDF0
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*
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LDY #0
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:LP
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LDA (ADDR3),Y
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AND #$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 (ADDR3),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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*
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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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* __RSAV: REGISTRY SAVE *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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__RSAV
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STA ERRA
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STX ERRX
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STY ERRY
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:C BCC :C0
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BCS :C1
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:Z BEQ :Z1
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BNE :Z0
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:N BMI :N1
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BPL :N0
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:O BVC :O0
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BVS :O1
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JMP :EXIT
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:C0 LDA #0
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STA ERRCARRY
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JMP :Z
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:C1 LDA #1
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STA ERRCARRY
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JMP :Z
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:Z1 LDA #1
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STA ERRZERO
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JMP :N
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:Z0 LDA #0
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STA ERRZERO
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JMP :N
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:N1 LDA #1
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STA ERRNEG
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JMP :O
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:N0 LDA #0
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STA ERRNEG
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JMP :O
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:O0 LDA #0
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STA ERROVF
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JMP :EXIT
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:O1 LDA #1
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STA ERROVF
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:EXIT
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RTS
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*
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*``````````````````````````````*
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* __RDMP: REGISTRY DUMP *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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__RDMP
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_PRNT " ",8D8D
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_PRNT "REGISTRY DUMP",8D
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_PRNT "=============",8D
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_PRNT "A: "
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LDA ERRA
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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 ERRA
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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 $FDF0
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_PRNT " ",8D
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_PRNT "X: "
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LDA ERRX
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AND #$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 ERRX
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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 $FDF0
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_PRNT " ",8D
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_PRNT "Y: "
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LDA ERRY
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AND #$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 ERRY
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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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_PRNT " ",8D8D
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_PRNT "STATUS FLAGS",8D
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_PRNT "============",8D8D
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LDA #0
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CMP ERRCARRY
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BEQ :CARCLR
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_PRNT "CARRY: SET",8D
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JMP :TESTN
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:CARCLR _PRNT "CARRY: CLEAR",8D
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:TESTN LDA #0
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CMP ERRNEG
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BEQ :NEGCLR
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_PRNT "NEGATIVE: SET",8D
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JMP :TESTZ
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:NEGCLR _PRNT "NEGATIVE: CLEAR",8D
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:TESTZ LDA #0
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CMP ERRZERO
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BEQ :ZCLR
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_PRNT "ZERO: SET",8D
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JMP :TESTO
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:ZCLR _PRNT "ZERO: CLEAR",8D
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:TESTO
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LDA #0
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CMP ERROVF
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BEQ :OCLR
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_PRNT "OVERFLOW: SET",8D
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JMP :FIN
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:OCLR _PRNT "OVERFLOW: CLEAR",8D8D8D
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:FIN
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RTS
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*
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** DATA
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*
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:LEFT DS 1
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:RIGHT DS 1
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HEXTAB ASC "0123456789ABCDEF"
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*
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*``````````````````````````````*
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* __ERR: ERROR HANDLING SUB *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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__ERR
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*
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** SAVE RETADR OF LAST CALL
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*
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LDY #0
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LDA (RETADR),Y
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STA :RET
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INY
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LDA (RETADR),Y
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STA :RET+1
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*
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JSR __RSAV
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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 :DUMPLEN ; LENGTH OF DUMP
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PLA
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STA :DUMP ; DUMP ADDRESS LO
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PLA
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STA :DUMP+1 ; DUMP HI
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PLA
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STA :DMPMSG
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PLA
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STA :DMPMSG+1
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PLA
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STA :MESG ; ERROR MESSAGE ADDR LO
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PLA
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STA :MESG+1 ; HI
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PLA
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STA :SRID ; SUBROUTINE ID ADDR LO
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PLA
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STA :SRID+1 ; SUB ID HI
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*
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_PRNT " ",87878787878D8D
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_PRNT "ERROR!",8D8D
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_PRNT "SUBROUTINE: "
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LDY #0
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LDA :SRID
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STA ADDR1
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LDA :SRID+1
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STA ADDR1+1
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:LP1
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LDA (ADDR1),Y
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BEQ :LPX1
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JSR $FDF0
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INY
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BNE :LP1
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:LPX1
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_PRNT " ",8D
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_PRNT "MESSAGE: "
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LDY #0
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LDA :MESG
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STA ADDR1
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LDA :MESG+1
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STA ADDR1+1
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:LP2
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LDA (ADDR1),Y
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BEQ :LPX2
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JSR $FDF0
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INY
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BNE :LP2
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:LPX2
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_PRNT " ",8D8D
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_WAIT
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LDY #0
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LDA :DMPMSG
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STA ADDR1
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LDA :DMPMSG+1
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STA ADDR1+1
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:LP3
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LDA (ADDR1),Y
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BEQ :LPX3
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JSR $FDF0
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INY
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BNE :LP3
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:LPX3
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_PRNT " ",8D
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LDA :DUMP+1
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PHA
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LDA :DUMP
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PHA
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LDA :DUMPLEN
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PHA
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JSR __DUMP
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_WAIT
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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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_PRNT " ",8D8D
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_WAIT
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_RDUMP
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_WAIT
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LDA ERRSTOP
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CMP #1
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BEQ :KILL
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RTS
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:KILL
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_PRNT " ",8D8D
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_PRNT "BREAK AT: "
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_DUMP :RET;#2
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*
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JMP $3D0
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*
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** DATA
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*
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:DUMPLEN DS 1
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:DUMP DS 2
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:DMPMSG DS 2
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:MESG DS 2
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:SRID DS 2
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:RET DS 2
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*
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