JPS6412697A - Function switching control system for central processing unit - Google Patents

Function switching control system for central processing unit

Info

Publication number
JPS6412697A
JPS6412697A JP16925187A JP16925187A JPS6412697A JP S6412697 A JPS6412697 A JP S6412697A JP 16925187 A JP16925187 A JP 16925187A JP 16925187 A JP16925187 A JP 16925187A JP S6412697 A JPS6412697 A JP S6412697A
Authority
JP
Japan
Prior art keywords
hardware
circuit
flip
selects
state
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
JP16925187A
Other languages
Japanese (ja)
Inventor
Yoshiichi Tanabe
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
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 filed Critical NEC Corp
Priority to JP16925187A priority Critical patent/JPS6412697A/en
Publication of JPS6412697A publication Critical patent/JPS6412697A/en
Pending legal-status Critical Current

Links

Landscapes

  • Exchange Systems With Centralized Control (AREA)

Abstract

PURPOSE:To timely improve throughput by allowing a central control circuit discriminate the function of the hardware constitution while reading the state of a flip-flop circuit. CONSTITUTION:With an external changeover switch 1 turned off, the state of the flip-flop circuit 2 is turned off, a selector 3 selects a clock 42 in a clock circuit 4, a hardware control circuit 5 selects an interrupt period of K(mS) and the result is fed respectively to the hardware. On the other hand, with the external changeover switch 1 turned on, the state of the flip-flop circuit 2 is set and the selector 3 selects a clock 41 by the clock circuit 4 and the hardware control circuit 5 selects the interrupt period of L(mS). Then a central control circuit 6 reads the state of the flip-flop circuit 2 at the required time during the program execution so as to discriminate at which interruption period the hardware of the present central processing unit is operative. Thus, the throughput is improved.
JP16925187A 1987-07-06 1987-07-06 Function switching control system for central processing unit Pending JPS6412697A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16925187A JPS6412697A (en) 1987-07-06 1987-07-06 Function switching control system for central processing unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16925187A JPS6412697A (en) 1987-07-06 1987-07-06 Function switching control system for central processing unit

Publications (1)

Publication Number Publication Date
JPS6412697A true JPS6412697A (en) 1989-01-17

Family

ID=15883048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16925187A Pending JPS6412697A (en) 1987-07-06 1987-07-06 Function switching control system for central processing unit

Country Status (1)

Country Link
JP (1) JPS6412697A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04982U (en) * 1990-04-19 1992-01-07

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04982U (en) * 1990-04-19 1992-01-07

Similar Documents

Publication Publication Date Title
EP0383474A3 (en) Processor interrupt control
JPS6412697A (en) Function switching control system for central processing unit
JPS5574618A (en) Operating frequency selector for digital computer
JPS56118123A (en) Microcomputer circuit
JPS5762062A (en) Controlling method for copying device equipped with sorter
JPS57113169A (en) Microcomputer
JPS5769344A (en) Controller of stored program
JPS5368944A (en) Clock conroller
JPS5685104A (en) Sequence controller
JPS5741744A (en) Program switching system of debug tool
JPS54159821A (en) Power source control system
JPS5685128A (en) Processor with clock controlling function
EP0414911A4 (en) Numerical control device for transfer machine
JPS54152939A (en) Microprogram interruption control system
JPS5469850A (en) Cooking oven
JPS6418850A (en) Program switching system
JPS57169764A (en) Picture forming device
JPS54117167A (en) Timing device
JPS5671142A (en) Microprocessor
JPS55134402A (en) Process control unit
JPS55140344A (en) Synchronization detection controlling system
JPS57193808A (en) Automatic power supply breaker for numerical controller
JPS55131805A (en) Multiprogrammable general controller
JPS5449039A (en) Logic circuit
JPS6455666A (en) Interrupt handling device