| 摘要 |
PURPOSE:To economize the capacity of a control storage device, by controlling a microprogram controlled information processing device by micro instructions having a branch instruction field and plural execution control fields, respectively. CONSTITUTION:A micro instruction to be executed is read from an address, which us designated through an output line 90 by a micro instruction address controlling unit 9, in a control storage device 1 and is stored in a micro instruction register 2. Respective bits of execution controlling fields 21 and 22 are supplied to memory control field decoders 3 and operation control field decoders 6, which are provided in accordance with respective fields, through output lines 230 and 260, and decoders 6 generate a specific signal in an operation control field decoder signal group 600 through a line 260. This specific signal is supplied to an operation unit 7 to execute the operation designated by this micro instruction. |
