mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2025-02-17 09:30:26 +00:00
276 lines
5.7 KiB
Plaintext
276 lines
5.7 KiB
Plaintext
*
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*``````````````````````````````*
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* APUT82 : PUT DATA INTO ELEM *
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*- -*
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* THIS PUTS DATA FROM ONE ADDR *
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* INTO THE ADDRESS OF AN ARRAY *
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* WITH THE INDEX OF [:XIDX], *
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* [:YIDX]. *
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*- -*
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* CLOBBERS: *
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* *
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* FLAGS: ????---- REG: AXYM *
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*- -*
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* CYCLES: ??? *
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* SIZE: *
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*- -*
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* USAGE: *
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* *
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* LDA #>$300 ; SOURCE DATA *
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* PHA *
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* LDA #<$300 *
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* PHA *
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* LDA #>$3A0 ; DEST ARRAY *
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* PHA *
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* LDA #<$3A0 *
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* PHA *
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* LDA #2 ; ELEM X INDEX *
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* PHA *
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* LDA #3 ; ELEM Y INDEX *
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* PHA *
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* JSR APUT82 *
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*- -*
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* ENTRY *
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* *
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* TOP OF STACK *
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* *
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* LOW BYTE OF RETURN ADDRESS *
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* HI BYTE OF RETURN ADDRESS *
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* ELEMENT Y INDEX *
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* ELEMENT X INDEX *
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* LOW BYTE OF DESTINATION ADDR *
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* HI BYTE OF DESTINATION ADDR *
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* LO BYTE OF SOURCE ADDRESS *
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* HI BYTE OF SOURCE ADDRESS *
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*- -*
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* EXIT *
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* *
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* TOP OF STACK *
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* *
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* LOW BYTE OF RETURN ADDRESS *
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* HI BYTE OF RETURN ADDRESS *
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* *
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* .Y = LOBYTE ELEMENT ADDRESS *
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* .X = HIBYTE ELEMENT ADDRESS *
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* .A = ELEMENT BYTE LENGTH *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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APUT82
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*
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** SAVE RETURN ADDRESS
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*
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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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*
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** GET PARAMETERS
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*
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PLA
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STA :YIDX ; Y INDEX
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DEC :YIDX
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PLA
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STA :XIDX ; X INDEX
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DEC :XIDX
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PLA
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STA ADDR4 ; ADDRESS OF ARRAY
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PLA
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STA ADDR4+1
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PLA
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STA ADDR3 ; ADDRESS OF DATA
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PLA ; TO BE COPIED
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STA ADDR3+1
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*
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** GET ARRAY SIZES
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*
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LDY #2
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LDA (ADDR4),Y
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STA :ESIZE
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STA :MCAND
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LDA #0
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STA :MCAND+1
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LDY #0
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LDA (ADDR4),Y
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STA :XLEN
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INY
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LDA (ADDR4),Y
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STA :YLEN
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LDY #0
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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 :XIDX ; IF X > MAX LEN
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CMP :XLEN
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BCS :XOVF
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JMP :ERRCONT1
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:XOVF
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_ERR :E_SID;:E_XOVF;:E_DUMP;:XIDX;#15
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:ERRCONT1
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LDA :YIDX ; IF Y > MAX LEN
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CMP :YLEN
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BCS :YOVF
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JMP :ERRCONT2
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:YOVF
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_ERR :E_SID;:E_YOVF;:E_DUMP;:XIDX;#15
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:ERRCONT2
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LDA :XIDX ; IF INDEX IS 0, ERR
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CMP #255
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BEQ :XOVF
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:ERRCONT3
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LDA :YIDX
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CMP #255
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BEQ :YOVF
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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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** MULTIPLY Y-INDEX BY Y-LENGTH
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*
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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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*
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:DOADD
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CLC
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ADC :YIDX
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TAX
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*
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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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*
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:LP
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ASL :YIDX
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ROL SCRATCH
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:ENTLP
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LSR :YLEN
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BCS :DOADD
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BNE :LP
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*
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STX :MLIER
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STY :MLIER+1
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*
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** NOW ADD X INDEX
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*
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CLC
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LDA :MLIER
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ADC :XIDX
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STA :MLIER
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BCC :CONTADD
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LDA :MLIER+1
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ADC #1
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STA :MLIER+1
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:CONTADD
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*
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** NOW MULTIPLY BY LENGTH OF ELEMENTS
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*
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LDA #0
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STA :PROD+2
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STA :PROD+3
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LDX #$10
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:SHIFTR LSR :MLIER+1
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ROR :MLIER
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BCC :ROTR
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LDA :PROD+2
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CLC
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ADC :MCAND
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STA :PROD+2
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LDA :PROD+3
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ADC :MCAND+1
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:ROTR
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ROR
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STA :PROD+3
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ROR :PROD+2
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ROR :PROD+1
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ROR :PROD
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DEX
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BNE :SHIFTR
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*
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CLC
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INC :PROD ; INCREASE BY 3
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INC :PROD
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INC :PROD
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BCC :NOCAR
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INC :PROD+1
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:NOCAR
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*
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** NOW ADD BASE ADDRESS OF ARRAY TO GET
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** THE ADDRESS OF THE INDEX VALUE
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*
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CLC
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LDA :PROD
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ADC ADDR4
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STA :PROD
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LDA :PROD+1
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ADC ADDR4+1
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STA :PROD+1
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LDA :PROD
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*SBC #1
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*STA :PROD
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*
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** RETURN ADDRESS IN Y(LOW) AND X(HIGH)
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*
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LDY :PROD
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LDX :PROD+1
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STY ADDR2
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STX ADDR2+1
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*
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LDY #0
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LDX #0
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*
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** COPY FROM SRC ADDR TO DEST ADDR
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*
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:CLP
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LDA (ADDR3),Y
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STA (ADDR2),Y
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INY
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CPY :ESIZE
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BNE :CLP
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*
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** RESTORE RETURN ADDRESS
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*
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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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*
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** RETURN ELEMENT ADDRESS AND SIZE
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*
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LDX ADDR2+1
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LDY ADDR2
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LDA :ESIZE
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*
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RTS
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*
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** DATA
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*
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:ESIZE DS 1
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:XIDX DS 1
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:YIDX DS 1
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:MCAND DS 2
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:MLIER DS 2
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:PROD DS 4
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:XLEN DS 1
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:YLEN DS 1
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*
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:E_SID ASC "APUT82 (PUT82 MACRO)",00
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:E_DUMP ASC ":XIDX(1) :YIDX(1) :MCAND(2) :MLIER(2)"
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ASC ":PROD(4) :XLEN(1) :YLEN(1)",00
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:E_XOVF ASC "OUT OF BOUNDS! X > MAXIMUM OR IS 0.",00
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:E_YOVF ASC "OUT OF BOUNDS! Y > MAX OR IS 0.",00
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*
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