mirror of
https://github.com/fadden/6502bench.git
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fdd2bcf847
Two basic problems: (1) cc65, being a one-pass assembler, can't tell if a forward-referenced label is 16-bit or 24-bit. If the operand is potentially ambiguous, such as "LDA label", we need to add an operand width disambiguator. (The existing tests managed to only do backward references.) (2) 64tass wants the labels on JMP/JSR absolute operands to have 24-bit values that match the current program bank. This is the opposite of cc65, which requires 16-bit values. We need to distinguish PBR vs. DBR instructions (i.e. "LDA abs" vs. "JMP abs") and handle them differently when formatting for "Common". Merlin32 doesn't care, and ACME doesn't work at all, so neither of those needed updating. The 20052-branches-and-banks test was expanded to cover the problematic cases.
115 lines
2.3 KiB
ArmAsm
115 lines
2.3 KiB
ArmAsm
.setcpu "65816"
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zero = $00
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longsym = $123456
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; .segment "SEG000"
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.org $1000
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.a8
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.i8
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clc
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xce
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sep #$30
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jml L440000
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lodat: .byte $00
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.byte $01
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.byte $02
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; .segment "SEG001"
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.org $440000
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L440000: cmp L440000
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L440004: lda L440000
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lda a:L440000 & $ffff
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lda zero
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bmi L440004
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.byte $62,$b2,$ff
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.byte $d0,$b0
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.byte $82,$a9,$ff
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dat44: .word dat44 & $ffff
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.faraddr dat44
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; .segment "SEG002"
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.org $44ffc0
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L44FFC0: cmp L44FFC0
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high44: beq @L44FFCB
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.byte $30,$3c
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.byte $82,$39,$00
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@L44FFCB: jml @L2000
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; .segment "SEG003"
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.org $2000
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@L2000: bit @L2000
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pea dat44 & $ffff
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pea dat44 >> 16
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bne skip
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jml [lodat]
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skip: nop
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jsr j2
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j2: jsr j2+3
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jsr j2-3
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jsl longsym
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jml bank54
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; .segment "SEG004"
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.org $543210
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bank54: cmp bank54
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bra L54321C
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backchk: nop
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nop
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L543218: rts
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backval: .faraddr backchk
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L54321C: lda backchk
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lda f:fwdchk
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lda $543216
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lda $54327d
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lda backchk & $ffff +1
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lda backchk & $ffff -1
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lda fwdchk & $ffff +1
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lda fwdval & $ffff +2
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nop
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jsr backchk & $ffff
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jsr backchk & $ffff +1
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jsr L543218 & $ffff
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jsr fwdchk & $ffff
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jsr fwdchk & $ffff +1
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jsr L54327F & $ffff
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nop
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ldx #$00
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jsr (backval & $ffff,x)
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jsr (fwdval & $ffff,x)
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jsr @L54326E & $ffff
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jsr @L543271 & $ffff
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jsr @L543268 & $ffff
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jsr @L54326B & $ffff
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jsr @L543274 & $ffff
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jsr @L543277 & $ffff
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bra L543280
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@L543268: jmp (backval & $ffff,x)
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@L54326B: jmp (fwdval & $ffff,x)
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@L54326E: jmp ($1008)
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@L543271: jmp ($1008)
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@L543274: jml [$1008]
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@L543277: jml [$1008]
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fwdval: .faraddr fwdchk
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fwdchk: nop
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nop
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L54327F: rts
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L543280: jsr skip
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rtl
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