mirror of
https://github.com/fadden/6502bench.git
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478afa542e
On the 65816, if you say "JSR foo" from bank $12, but "foo" is an address in bank 0, most assemblers will conclude that you're forming a 16-bit argument with a 16-bit address and assemble happily. 64tass halts with an error. Up until v1.55 or so, you could fake it out by supplying a large offset. This no longer works. The preferred way to say "no really I mean to do this" is to append ",k" to the operand. We now do that as needed. I didn't want to define a new ExpressionMode for 64tass just to support an operand modifier that should probably never actually get generated (you can't call across banks with JSR!), so this is implemented with a quirk and an op flag. 64tass v1.56.2625 is now the default. (issue #104)
152 lines
2.7 KiB
ArmAsm
152 lines
2.7 KiB
ArmAsm
.cpu "65816"
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zero = $00
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longsym = $123456
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* = $1000
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.as
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.xs
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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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.logical $440000
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L440000 cmp L440000
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L440004 lda L440000
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lda @wL440000 & $ffff
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lda zero
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bmi L440004
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per high44
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bne high44
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brl L44FFC0
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dat44 .word dat44 & $ffff
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.long dat44
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.here
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.logical $44ffc0
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L44FFC0 cmp L44FFC0
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high44 beq _L44FFCB
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bmi L440004
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brl L440004
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_L44FFCB jml _L2000
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.here
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.logical $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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.here
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.logical $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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rts
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backval .long backchk
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L54321C lda backchk
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lda fwdchk
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lda $543216
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lda $54327d
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lda 0+(backchk & $ffff)+1
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lda 0+(backchk & $ffff)-1
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lda 0+(fwdchk & $ffff)+1
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lda 0+(fwdval & $ffff)+2
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nop
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jsr backchk
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jsr backchk+1
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jsr $543218
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jsr fwdchk
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jsr fwdchk+1
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jsr $54327f
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nop
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ldx #$00
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jsr (backval,x)
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jsr (fwdval,x)
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jsr _L54326E
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jsr _L543271
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jsr _L543268
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jsr _L54326B
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jsr _L543274
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jsr _L543277
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bra L543280
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_L543268 jmp (backval,x)
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_L54326B jmp (fwdval,x)
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_L54326E jmp (lodat)
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_L543271 jmp (lodat)
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_L543274 jml [lodat]
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_L543277 jml [lodat]
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fwdval .long fwdchk
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fwdchk nop
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nop
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rts
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L543280 jsr skip,k
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nop
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rep #$30
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.al
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.xl
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php
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lda #$0000
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sep #$30
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.as
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.xs
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lda #$00
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plp
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lda #$ea
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nop
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sep #$30
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php
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lda #$00
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rep #$30
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.al
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.xl
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lda #$0000
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plp
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lda #$eaea
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rep #$30
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nop
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lda skip
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lda skip+20
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jsr skip,k
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jsr skip+20,k
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jsr (skip,k,x)
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bne _L5432B7
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jmp (skip,k,x)
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_L5432B7 jsr $54edcb
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lda $edcb
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bne _L5432C2
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jmp ($54edcb,x)
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_L5432C2 nop
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rtl
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.here
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