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33 lines
879 B
Python
33 lines
879 B
Python
"""
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Simplistic 8/16 bit Virtual Machine to execute a stack based instruction language.
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Main entry point to launch a VM to execute the given programs.
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Written by Irmen de Jong (irmen@razorvine.net) - license: GNU GPL 3.0
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"""
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import sys
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from .parse import Parser
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from .vm import VM
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mainprogram = None
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timerprogram = None
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if len(sys.argv) >= 2:
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source = open(sys.argv[1]).read()
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parser = Parser(source)
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mainprogram = parser.parse()
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if len(sys.argv) == 3:
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source = open(sys.argv[2]).read()
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parser = Parser(source)
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timerprogram = parser.parse()
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if len(sys.argv) not in (2, 3):
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raise SystemExit("provide 1 or 2 program file names as arguments")
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# zero page and hardware stack of a 6502 cpu are off limits for now
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VM.readonly_mem_ranges = [(0x00, 0xff), (0x100, 0x1ff)]
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vm = VM(mainprogram, timerprogram)
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vm.enable_charscreen(0x0400, 40, 25)
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vm.run()
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