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2c938f7312
bank management, Use of promises to resolve symbols that are used before they are defined. A base class for all instructions and assembler directives. Hopefully my scoped symbols can be used to create C like data structures in the zero page, ie sprite.x New code to prodce the final ROM. Basically everything was rewritten.
52 lines
937 B
Ruby
52 lines
937 B
Ruby
require_relative '../instruction_base'
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module Assembler6502
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####
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## This directive instruction can include a binary file
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class IncBin < InstructionBase
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#### Custom Exceptions
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class FileNotFound < StandardError; end
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####
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## Try to parse an incbin directive
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def self.parse(line)
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match_data = line.match(/^\.incbin "([^"]+)"$/)
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return nil if match_data.nil?
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filename = match_data[1]
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IncBin.new(filename)
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end
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####
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## Initialize with filename
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def initialize(filename)
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@filename = filename
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end
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####
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## Execute on the assembler
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def exec(assembler)
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unless File.exists?(@filename)
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fail(FileNotFound, ".incbin can't find #{@filename}")
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end
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data = File.read(@filename).unpack('C*')
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assembler.write_memory(data)
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end
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####
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## Display
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def to_s
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".incbin \"#{@filename}\""
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end
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end
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end
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