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99cd0d3ac1
C64 PRG files are pretty common. Their salient feature is that they start with a 16-bit value that is used as the load address. The value is commonly generated by the assembler itself, rather than explicitly added to the source file. Not all assemblers know what a PRG file is, and some of them handle it in ways that are difficult to guarantee in SourceGen. ACME adds the 16-bit header when the output file name ends in ".prg", cc65 uses a modified config file, 64tass uses a different command-line option, and Merlin 32 has no idea what they are. This change adds PRG file detection and handling to the 64tass code generator. Doing so required making a few changes to the gen/asm interfaces, because we now need to have the generator pass additional flags to the assembler, and sometimes we need code generation to start somewhere other than offset zero. Overall the changes were pretty minor. The 20042-address-changes test needed a 6502-only variant. A new test (20040-address-changes) has been added and given a PRG header. As part of this change the 65816 variant was changed to use addresses in bank 2, which uncovered a code generation bug that this change also fixes. The 64tass --long-address flag doesn't appear to be necessary for files <= 65536 bytes long, so we no longer emit it for those. (issue #90)
124 lines
2.4 KiB
ArmAsm
124 lines
2.4 KiB
ArmAsm
.cpu "65816"
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* = $021000
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.as
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.xs
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clc
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xce
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sep #$ff
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jsr L21100
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jsr L21107
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jmp L22000
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.logical $021100
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L21100 bit L21100 & $ffff
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L21103 lda #$11
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ldx #$11
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L21107 ldy #$11
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per L21103
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bra L21103
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.here
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.logical $021100
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_L21100_0 bit _L21100_0 & $ffff
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lda #$22
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_L21105 ldx #$22
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ldy #$22
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per _L21105
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jmp _L21105
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.here
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.logical $021100
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_L21100_1 bit _L21100_1 & $ffff
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lda #$33
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ldx #$33
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_L21107_0 ldy #$33
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per _L21107_0
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bra _L21107_0
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.here
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.logical $022000
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L22000 bit L22000 & $ffff
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beq $022018
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bra _L22020
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.here
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.logical $022020
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_L22020 bit _L22020 & $ffff
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beq $022029
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brl _L22080
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_offend nop
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.here
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.logical $022080
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_L22080 bit _L22080 & $ffff
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lda _offend & $ffff
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jsr _offend
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lda $2029
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jsr $022029
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lda 0+(_L22080 & $ffff)-1
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jsr _L22080-1
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lda _L22080 & $ffff
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jsr _L22080
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lda $00
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beq _L22100
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.byte $ad
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.here
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.logical $022100
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_L22100 nop
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nop
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jmp _L23000
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.here
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.logical $022800
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.byte $00
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.byte $28
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.fill 14,$00
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.here
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.logical $022820
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.fill 18,$00
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.here
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.logical $023000
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_L23000 bit _L23000 & $ffff
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lda #$44
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ldx #$44
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ldy #$44
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brl _fwd
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_ulabel .byte $00
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.byte $01
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.here
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.logical $023100
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.byte $02
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_fwd bit _fwd & $ffff
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lda _ulabel & $ffff
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lda 0+(_ulabel & $ffff)+1
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lda $300e
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lda $300f
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lda 0+(_fwd & $ffff)-1
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beq _L23182
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.byte $ea
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.byte $ea
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.here
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.logical $023180
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.byte $00
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.byte $01
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_L23182 bit _L23182 & $ffff
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lda _label1 & $ffff
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lda 0+(_label1 & $ffff)+1
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lda 0+(_label1 & $ffff)+112
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bra _L23200
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_label1 .byte $ea
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.byte $ea
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.here
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.logical $023200
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_L23200 bit _L23200 & $ffff
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.byte $00
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.byte $01
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.here
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