发明名称 |
Method and circuit arrangement for sequencing microinstruction sequences in data processing equipment |
摘要 |
A circuit for sequencing microinstruction sequences in data processing equipment in which during the course of a primary sequence subroutine jumps are performed and subsequences are carried out and at the end of each, a return jump into the primary sequence takes place due to the control provided by a temporarily stored return jump address at a point in the sequence at which a two-part branching instruction is to be evaluated. The first part of the branching instruction characterizes a branching function which is to be carried out dependent on a decision which is specified in the second part thereof. The circuit includes a microinstruction storage from which microinstruction sequences are taken over depending upon the output signals from a central fixed-cycle control circuit fed into a microinstruction register and a recoder which is arranged thereafter. The central fixed-cycle control circuit feeds into the microinstruction register, through a control signal which characterizes a return jump, a first output signal for maintaining the return jump instruction stored in the microinstruction register and a second output signal for the additional taking over of the branching instruction which is controlled by the return jump address which is transmitted into a microinstruction address register.
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申请公布号 |
US4156900(A) |
申请公布日期 |
1979.05.29 |
申请号 |
US19770788406 |
申请日期 |
1977.04.18 |
申请人 |
NIXDORF COMPUTER AG |
发明人 |
GRUNO, GERHARD;LOHNSTEIN, WOLFGANG;MATSCHKE, WOLFGANG |
分类号 |
G06F9/26;(IPC1-7):G06F9/12;G06F9/18;G06F9/20 |
主分类号 |
G06F9/26 |
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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