JPS5680746A - Microprogram controlling device - Google Patents

Microprogram controlling device

Info

Publication number
JPS5680746A
JPS5680746A JP15766979A JP15766979A JPS5680746A JP S5680746 A JPS5680746 A JP S5680746A JP 15766979 A JP15766979 A JP 15766979A JP 15766979 A JP15766979 A JP 15766979A JP S5680746 A JPS5680746 A JP S5680746A
Authority
JP
Japan
Prior art keywords
microprogram
branch condition
condition input
instructions
controlling device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15766979A
Other languages
Japanese (ja)
Inventor
Takao Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP15766979A priority Critical patent/JPS5680746A/en
Publication of JPS5680746A publication Critical patent/JPS5680746A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To reduce the generation amount of microprogram instructions while shortening a test time when testing branch condition inputs, by adding a branch condition input selective compressing circuit.
CONSTITUTION: For example, a microprogram instruction assigns and executes condition assignment A0A1A2A3=0101. From branch condition input selective compressing circuit 105, compressed branch condition input B0B1B2B3=00X1X3 is obtained and then inputted to address register 102 to determine microprogram instructions to be executed next. Therefore, those microprogram instructions depend upon the state of branch condition input X1X3 and the number of them is four. In the figure, 101 is a microprogram memory, 103 is a microprogram instruction register, and 104 is a microprogram control part.
COPYRIGHT: (C)1981,JPO&Japio
JP15766979A 1979-12-05 1979-12-05 Microprogram controlling device Pending JPS5680746A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15766979A JPS5680746A (en) 1979-12-05 1979-12-05 Microprogram controlling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15766979A JPS5680746A (en) 1979-12-05 1979-12-05 Microprogram controlling device

Publications (1)

Publication Number Publication Date
JPS5680746A true JPS5680746A (en) 1981-07-02

Family

ID=15654783

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15766979A Pending JPS5680746A (en) 1979-12-05 1979-12-05 Microprogram controlling device

Country Status (1)

Country Link
JP (1) JPS5680746A (en)

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