发明名称 |
INSTRUCTION FETCH CONTROL SYSTEM IN A COMPUTER |
摘要 |
An I-fetch control system for a computer includes a control store (30) for storing end op, I-1, I-2 and return words. A microinstruction decode and control unit (170) responds to end op words to initialize and personalize computer components to facilitate subsequent execution of a high level instruction. The control unit (170), in conjunction with a next address logic (162), selects the next @micro-instruction @ to be executed in response to a high level instruction. The control unit (170) and logic (162) are responsive to I-1 words to personalize the computer and to select a microinstruction to begin E-phase of a high level instruction. In response to I-2 control words, the control unit (170) and logic (162) select an operand fetch routine in the control store (30), and write a first E-phase address into a local store (138). The return word gates the first E-phase address from the local store (138) to select a microinstruction in the control store (30) to being E-phase. |
申请公布号 |
DE2966069(D1) |
申请公布日期 |
1983.09.22 |
申请号 |
DE19792966069 |
申请日期 |
1979.09.24 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
BERGLUND, NEIL CLAIR;CROWLEY, RICHARD DOUGLAS;KEMPKE, WILLIAM GEORGE;RICHARDSON, WILLIAM CAIN |
分类号 |
G06F9/22;G06F9/26;G06F9/30;G06F9/318;G06F9/32;(IPC1-7):G06F9/06;G06F13/00 |
主分类号 |
G06F9/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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