mirror of https://github.com/emkay/parser-6502.git
53 lines
1.1 KiB
JavaScript
53 lines
1.1 KiB
JavaScript
const mona = require('mona')
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const parameters = require('./parameters').parameters
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const instructions = [
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'adc', 'and', 'asl',
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'bcc', 'bcs', 'beq', 'bit', 'bmi', 'bne', 'bpl', 'brk', 'bvc', 'bvs',
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'clc', 'cld', 'cli', 'clv', 'cmp', 'cpx', 'cpy',
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'dec', 'dex', 'dey',
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'eor',
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'inc', 'inx', 'iny',
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'jmp', 'jsr',
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'lda', 'ldx', 'ldy', 'lsr',
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'nop',
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'ora',
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'pha', 'php', 'pla', 'plp',
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'rol', 'ror', 'rti', 'rts',
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'sbc', 'sec', 'sed', 'sei', 'sta', 'stx', 'sty',
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'tax', 'tay', 'tsx', 'txa', 'txs', 'tya'
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]
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function instructionName () {
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return mona.oneOf(instructions)
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}
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function instruction () {
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return mona.sequence((s) => {
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const i = s(
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mona.followedBy(
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instructionName(),
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mona.maybe(mona.eol())
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)
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)
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const args = s(
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mona.maybe(
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mona.and(
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mona.spaces(),
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mona.followedBy(
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parameters(),
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mona.maybe(mona.eol())
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)
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)
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)
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)
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return mona.value({
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instruction: i,
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args: args
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})
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})
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}
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module.exports = instruction
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