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* Remove ~reg second operand sourceHEADmasterBobby Bingham2017-01-081-1/+1
| | | | | This was only used by the notneg instruction, which no longer needs it after having been reimplemented in terms of subtraction.
* Add carry input to ALUBobby Bingham2017-01-081-1/+3
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* widen register set control signal, fix bugs with conditional sets related to ↵Nick McKinney2016-12-291-2/+2
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* Add ALU stage and hook it up. It sort of works.Nick McKinney2016-12-181-0/+41