| 摘要 |
PURPOSE:To reduce the number of parts by storing the contents of a direct immediate field in a memory for storing an indirect immediate data, and reading them out by executing an access by the contents of an indirect or direct immediate designating field. CONSTITUTION:The contents of a direct immediate field and its parity are stored in address area 000-01F of a memory 31 for storing an indirect immediate data and its parity in address areas 020-FFF, so that one of an indirect immediate data designating address 33 and a direct immediate designating address 34 can be selected by a multiplexer 32. In this state, the multiplexer 32 selects one of the addresses 33, 34 by a micro-instruction, outputs it to the memory 31, and outputs the corresponding data and its parity to a bus 36 through a driver 35. In such a way, a conventional data and parity generating circuit, etc. are not required.
|
