mirror of
https://github.com/nathanriggs/AppleIIAsm-Collection.git
synced 2024-11-24 22:32:42 +00:00
111 lines
2.4 KiB
Plaintext
111 lines
2.4 KiB
Plaintext
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*
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*``````````````````````````````*
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* BLOAD :: BINARY LOAD *
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*- -*
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* SIMPLY BLOADS INTO MEMORY AS *
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* SPECIFIED BY THE STRING *
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* PASSED AS A PARAMETER. *
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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 #>SADDR ; STRING ADDR *
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* PHA *
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* LDA #<SADDR *
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* PHA *
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* JSR BLOAD *
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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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* LO BYTE OF STRING ADDRESS *
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* HI BYTE OF STRING 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 = UNCHANGED *
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* X = UNCHANGED *
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* A = CLOBBERED; TRSAH *
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*,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,*
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*
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*
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BLOAD
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*
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** GET 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 ADDR2 ; CMD STRING ADDR
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PLA
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STA ADDR2+1
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*
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LDA #$8D
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JSR FCOUT
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LDA #$84 ; CTRL-D
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JSR FCOUT
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LDA #$C2 ; B
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JSR FCOUT
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LDA #$CC ; L
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JSR FCOUT
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LDA #$CF ; O
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JSR FCOUT
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LDA #$C1 ; A
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JSR FCOUT
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LDA #$C4 ; D
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JSR FCOUT
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LDA #$A0 ; [SPACE]
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JSR FCOUT
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*
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** NOW SEND STRING TO COUT
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*
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LDY #0
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LDA (ADDR2),Y
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STA :SLEN
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LDY #1
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:LP
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LDA (ADDR2),Y
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JSR FCOUT
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INY
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CPY :SLEN
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BCC :LP
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BEQ :LP
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*
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** NOW PRESS RETURN AND PRAY
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*
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LDA #$8D
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JSR FCOUT
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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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RTS
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*
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** DATA
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*
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:SLEN DS 1
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*
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