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b43fd07688
My original goal was to add a sign-extended decimal format, but that turned out to be awkward. It works for data items and instructions with immediate operands (e.g. "LDA #-1"), but is either wrong or useless for address operands, since most assemblers treat integers as 32-bit values. (LDA -1 is not LDA $FFFF, it's LDA $FFFFFFFF, which is not useful unless your asm is doing an implicit mod.) There's also a bit of variability in how assemblers treat negative values, so I'm shelving the idea for now. I'm keeping the updated tests, which are now split into 6502 / 65816 parts. Also, updated the formatter to output all decimal values as unsigned. Most assemblers were fine with negative values, but 64tass .dword insists on positive. Rather than make the opcode conditional on the value's range, we now just always output unsigned decimal, which all current assemblers accept.
100 lines
2.1 KiB
ArmAsm
100 lines
2.1 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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; Basic tests for 6502.
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;
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; Assembler: Merlin 32
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org $1000
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; Basic operand formats. Show first set as hex, second as decimal,
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; third as sign-extended decimal, fourth as binary.
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lda $01
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lda $0102
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lda $fe
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lda $feff
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lda $01
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lda $0102
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lda $fe
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lda $feff
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lda $01
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lda $0102
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lda $fe
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lda $feff
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lda $01
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lda $0102
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lda $fe
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lda $feff
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jmp :skipdata
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; Now hex/decimal/sdec/binary, each with .dd1/.dd2/.dd3/.dd4
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hex 01010201020301020304
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hex 01010201020301020304
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hex 01010201020301020304
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hex 01010201020301020304
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; bonus round for sdec
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hex fffffefffefdfffefdfc
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:skipdata
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; Convert these to ASCII; requires editing file. The code generator
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; should display some of these as hex.
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lda #$68
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lda $68
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lda: $0068
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lda #$1f
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lda #$20
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lda #$22
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lda #$27
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lda #$7e
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lda #$7f
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lda #$80
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lda #$9f
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lda #$a0
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lda #$a2
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lda #$a7
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lda #$fe
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lda #$ff
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jmp end
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; Continuing with ASCII
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:ascii
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dfb $68
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dfb $80
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dw $6868
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dfb $80
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; Format first set as address, second set as symbol.
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dw :skipdata
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adr :skipdata
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dfb >:skipdata,:skipdata ;format as big-endian address
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dfb :ascii
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dfb >:ascii
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dw :ascii
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adr :ascii
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adrl :ascii
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dfb >:ascii,:ascii ;format as big-endian symbol
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; Merlin 1.0 has trouble with "DFB '{'". Test it and the neighbors.
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dfb '['
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dfb $7b
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dfb $7c
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dfb $7d
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dfb ','
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dfb "["
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dfb $fb
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dfb $fc
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dfb $fd
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dfb ","
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end rts
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