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- /* state diagram of the 1 bit bcpu cpu */
- digraph bcpu {
- reset -> fetch [label="start"]
- fetch -> execute
- fetch -> indirect [label="flag(IND) = '1'\n and op < 8"]
- fetch -> reset [label="flag(RST) = '1'"]
- fetch -> halt [label="flag(HLT) = '1'"]
- indirect -> operand
- operand -> execute
- execute -> advance
- execute -> store [label="op = 'store'"]
- execute -> load [label="op = 'load'"]
- execute -> fetch [label="(op = 'jumpz' and acc = 0)\n or op ='jump'"]
- store -> advance
- load -> advance
- advance -> fetch
- halt -> halt
- }
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