JPS55105747A - Microprocessor - Google Patents

Microprocessor

Info

Publication number
JPS55105747A
JPS55105747A JP1224779A JP1224779A JPS55105747A JP S55105747 A JPS55105747 A JP S55105747A JP 1224779 A JP1224779 A JP 1224779A JP 1224779 A JP1224779 A JP 1224779A JP S55105747 A JPS55105747 A JP S55105747A
Authority
JP
Japan
Prior art keywords
output
carry
sign
result
microprocessor
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
JP1224779A
Other languages
Japanese (ja)
Inventor
Toshio Oshima
Kazuhiro Sumimoto
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.)
Hitachi Denshi KK
Original Assignee
Hitachi Denshi KK
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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP1224779A priority Critical patent/JPS55105747A/en
Publication of JPS55105747A publication Critical patent/JPS55105747A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To perform the operation at high speed, by detecting that other registers and the result of operation are opposite in the sign, through the carry signal indicating carry and the code bit of one register, among the output signals of the operation section from the microprocessor including ALU.
CONSTITUTION: In the microprocessor having the architecture in which one input data among those to ALU from two or more registers can not be outputted externally, the sign output 12 of rhe result of operation obtained via the output buffer from the output section 4a of multiplexer and the carry output 10 indicating the carry of result of operaion are inputted to the exclusive OR gate 13 to obtain the sign discrimination output 11.
COPYRIGHT: (C)1980,JPO&Japio
JP1224779A 1979-02-07 1979-02-07 Microprocessor Pending JPS55105747A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1224779A JPS55105747A (en) 1979-02-07 1979-02-07 Microprocessor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1224779A JPS55105747A (en) 1979-02-07 1979-02-07 Microprocessor

Publications (1)

Publication Number Publication Date
JPS55105747A true JPS55105747A (en) 1980-08-13

Family

ID=11800028

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1224779A Pending JPS55105747A (en) 1979-02-07 1979-02-07 Microprocessor

Country Status (1)

Country Link
JP (1) JPS55105747A (en)

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