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2022-10-31Level-trigger on TTO_FLAG instead of edge-trigger.Julian Blake Kongslie2-4/+3
2022-10-31Unify TT_INPUT_INT_ENABLE and TT_OUTPUT_INT_ENABLEJulian Blake Kongslie3-6/+5
2022-10-31Only use DF for addresses generated via indirection.Julian Blake Kongslie3-3/+3
2022-10-31TAD is 12-bit addition with carry-complements-link, not 13-bit additionJulian Blake Kongslie2-3/+2
2022-10-31Fix echo_optimal (was not resetting AC on all loop iterations)Julian Blake Kongslie1-6/+6
2022-10-29Understanding interrupt handling within SIMH (see echo_int.pal)Julian Blake Kongslie14-30/+263
2022-10-29Control register values should not be "unsigned int"Julian Blake Kongslie7-66/+37