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https://github.com/fadden/6502bench.git
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b7d3e3cfdf
Split into 6502/65816 portions. The 6502 version is the original with a few in-place substitutions (e.g. JMP for BRL). The 65816 version is only needed to exercise special handling of PEA/PER.
108 lines
3.1 KiB
ArmAsm
108 lines
3.1 KiB
ArmAsm
; Copyright 2018 faddenSoft. All Rights Reserved.
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; See the LICENSE.txt file for distribution terms (Apache 2.0).
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;
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; Assembler: Merlin 32
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org $1000
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load11 lda #$11 ;EDIT: set label=load11
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load22 ldx #$22
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load33 ldy #$33 ;EDIT: set label=load33
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load44 lda #$44
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predat bne skipdat ;EDIT: set label=predat
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dat0 dw $0123
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dat1 dw $4567 ;EDIT: set label=dat1
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dat2 dw $89ab
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dat3 dw $cdef
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dat4 dw $0011
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dat5 dw $2233
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dfb $80
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asc 'The quick brown fox'
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dfb $80
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dw skipdat ;EDIT: format these as addresses
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dw skipdat-1
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dw skipdat+1
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fill0 ds 4 ;EDIT: set label=fill0
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fill1 ds 4
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fill2 ds 4
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fill3 ds 4
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postfill dfb $80
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skipdat ;EDIT: set label=skipdat
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lda dat0 ;this should get mapped to predat+2
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lda postfill
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asl dat1 ;these should coalesce to dat1
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rol dat2
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ror dat3 ;these should be auto-labeled
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and dat4
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ora dat5
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lda fill0 ;EDIT: set all labels to fill0
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sta fill1 ; and confirm that auto-labels vanish
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lda fill2 ; and we get a single 16-byte .fill
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sta fill3
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jsr load22 ;should get auto label
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lda load44 ;should get auto label
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; PEA/PER may want to push addr-1; make sure that works
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; (note: 65816-specific code replaced, PEA/PER now BIT/ORA)
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caddr
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bit caddr-1 ;should base off caddr
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ora caddr-1 ;should base off caddr
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lda caddr+1 ;should base off caddr
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lda caddr+2 ;should base off caddr
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; self-referential, self-modifying code (edge case for xrefs)
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lda #$ea
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srop1 sta srop1
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srop2 sta srop2+1
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srop3 sta srop3+2 ;EDIT: set operand to non-existent symbol
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jmp skipdat1
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dfb $80
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dat81 dfb $81 ;EDIT: set label dat81
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org $2000
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dat82 dfb $82
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dfb $83
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skipdat1
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nop
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nop
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lda dat81
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lda dat82 ;this should NOT use dat81
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;
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; Test the precise extent to which we associate a label with nearby elements.
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;
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jmp skipmore
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dfb $7c
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dfb $7d
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dfb $7e
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dfb $7f
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nearby dfb $80 ;EDIT: label this
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dfb $81
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dfb $82
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dfb $83
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dfb $84
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dfb $85
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dfb $86
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skipmore
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lda nearby-4
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lda nearby-3
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lda nearby-2
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lda nearby-1
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lda nearby
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lda nearby+1
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lda nearby+2
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lda nearby+3
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lda nearby+4
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lda nearby+5
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lda nearby+6
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rts
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