mirror of
https://github.com/fadden/6502bench.git
synced 2024-12-05 03:49:53 +00:00
b74630dd5b
Most assemblers end local label scope when a global label is encountered. cc65 takes this one step further by ending local label scope when constants or variables are defined. So, if we have a variable table with a nonzero number of entries, we want to create a fake global label at that point to end the scope. Merlin 32 won't let you write " LDA #',' ". For some reason the comma causes an error. IGenerator now has a "tweak operand format" interface that lets us fix that.
160 lines
4.2 KiB
ArmAsm
160 lines
4.2 KiB
ArmAsm
; Copyright 2019 faddenSoft. All Rights Reserved.
|
|
; See the LICENSE.txt file for distribution terms (Apache 2.0).
|
|
;
|
|
; Assembler: Merlin 32
|
|
|
|
; EDIT: add __ENABLE_LABEL_LOCALIZATION to project symbols
|
|
|
|
org $1000
|
|
|
|
; Define these as project symbols.
|
|
PROJ_ZERO equ $00
|
|
PROJ_ONE equ $01
|
|
CONST_ZERO equ $f0
|
|
CONST_ONE equ $f1
|
|
PTR_2 equ $f8 ;used to test uniqifier later on
|
|
|
|
ldy PROJ_ZERO
|
|
lda (PROJ_ONE),y
|
|
sta $03 ;undefined yet
|
|
ldx $04 ;undefined yet
|
|
lda CONST_ZERO,S ;explicitly set symbol
|
|
sta CONST_ONE,S ;leave as default (hex)
|
|
|
|
; TABLE - test redefinition of project symbol values
|
|
]VAR_ZERO equ $00 ;2b
|
|
]VAR_TWO equ $02 ;1b
|
|
]VAR_THREE equ $03 ;1b
|
|
]CONST_ZERO equ $f0 ;1b const
|
|
|
|
ldy PROJ_ZERO ;should become ]VAR_ZERO
|
|
lda (PROJ_ONE),y ;should become ]VAR_ZERO+1
|
|
sta $03 ;should become ]VAR_THREE
|
|
ldx $04 ;undefined yet
|
|
lda CONST_ZERO,S ;should become ]CONST_ZERO
|
|
sta CONST_ONE,S ;leave as default (hex)
|
|
|
|
eor $00 ;explicitly format as decimal
|
|
ora $f0,S ;explicitly format as decimal
|
|
|
|
; TABLE - test redefinition of symbol labels
|
|
]PROJ_ZERO equ $10 ;EDIT: rename to PROJ_ZERO
|
|
]DPCODE equ $80 ;EDIT: rename to DPCODE
|
|
|
|
lda $00
|
|
lda $01
|
|
lda $02
|
|
lda $03
|
|
lda $04
|
|
lda $10
|
|
lda $11
|
|
lda $80
|
|
|
|
; TABLE/CLEAR - empty table
|
|
ldx $00
|
|
ldx $01
|
|
ldx $02
|
|
|
|
; confirm that hidden tables are skipped over
|
|
dfb $2c
|
|
; TABLE (hidden)
|
|
]HIDDEN0 equ $00
|
|
]HIDDEN1 equ $01
|
|
lda #$ff
|
|
ldy $00
|
|
ldy $01
|
|
ldy $02
|
|
|
|
dfb $2c
|
|
; TABLE (not hidden)
|
|
]NH0 equ $00
|
|
]NH1 equ $01
|
|
:label lda #$fe
|
|
beq :label
|
|
ldy $00
|
|
ldy $01
|
|
ldy $02
|
|
|
|
nop
|
|
|
|
; TABLE
|
|
]PTR0 equ $10 ;2b
|
|
]CONST0 equ $10 ;4b
|
|
lda ]PTR0
|
|
ldx ]PTR0+1
|
|
ldy ]PTR0+2 ;should be hex
|
|
lda (]CONST0,S),y
|
|
sta (]CONST0+3,S),y
|
|
|
|
; test redefinition of name
|
|
|
|
; TABLE
|
|
]PTR equ $20 ;2b
|
|
ldx ]PTR
|
|
; TABLE
|
|
]PTR equ $22 ;2b
|
|
ldx ]PTR
|
|
; TABLE
|
|
]PTR equ $24 ;2b
|
|
ldx ]PTR
|
|
|
|
; define user label to try to trip up the uniqifier
|
|
PTR_1 nop
|
|
|
|
|
|
; test redefinition of value
|
|
; TABLE/CLEAR
|
|
]PTR_A equ $20 ;2b
|
|
ldy ]PTR_A ;PTR_A
|
|
]PTR_B equ $1f ;2b
|
|
ldy ]PTR_A ;PTR_B+1
|
|
]PTR_C equ $1d ;4b
|
|
ldy ]PTR_A ;PTR_C+3
|
|
]PTR_D equ $21 ;1b
|
|
ldy ]PTR_A ;should come up as hex
|
|
|
|
; TABLE
|
|
]VAL0 equ $30 ;1b
|
|
]VAL1 equ $31 ;1b
|
|
]VAL2 equ $32 ;1b
|
|
]VAL3 equ $33 ;1b
|
|
]VAL4 equ $34 ;1b
|
|
]VAL5 equ $35 ;1b
|
|
and ]VAL0
|
|
and ]VAL1
|
|
and ]VAL2
|
|
and ]VAL3
|
|
and ]VAL4
|
|
and ]VAL5
|
|
; TABLE
|
|
]VAL14 equ $31 ;4b
|
|
and ]VAL0
|
|
and ]VAL1 ;these four become ]VAL14
|
|
and ]VAL2
|
|
and ]VAL3
|
|
and ]VAL4
|
|
and ]VAL5
|
|
|
|
|
|
; TABLE - test direct page label vs. variable
|
|
]DPNOP equ $80
|
|
lda ]DPNOP
|
|
jsr DPCODE
|
|
rts
|
|
|
|
org $0080
|
|
DPCODE nop
|
|
lda DPCODE ;should be DPNOP
|
|
lda |DPCODE ;should be DPCODE
|
|
lda >DPCODE ;should be DPCODE
|
|
|
|
; Local label test. ca65 v2.18 erases cheap local label scope when it
|
|
; encounters a constant or .set.
|
|
LOCAL1 lda #$2c ;EDIT: format as ASCII
|
|
ldx $1234 ;put variable table here with one arbitrary entry
|
|
beq LOCAL1
|
|
LOCAL2 lda $2c ;EDIT: format as ASCII
|
|
ldx $5678 ;put empty variable table here
|
|
beq LOCAL2
|
|
rts
|