| 摘要 |
<p>A banked control store for conditional branching comprises: an address multiplexer (22) for receiving original instructions, branch instructions, and increment instructions for controlling the selection of an output of said address multiplexer; a control store address register (24) receiving the output of the address multiplexer; a single microinstruction memory (92) for receiving the output from the control store address register and for producing a memory output; a multiple microinstruction memory (96) for receiving the output from the control store address register; a memory select network (94) for receiving the output of the single microinstruction memory and said multiple microinstruction memory and having an output consisting of a selected memory output; an output register (36) for said memory select network; a single microinstruction flip-flop (26) for controlling the memory select network, the single microinstruction flip-flop receiving an output from the address multiplexer (22); a branch logic network (54) for producing a control output which is provided to the address multiplexer; and microcode branch condition register (56) for providing branch condition inputs to branch logic network. </p> |
