JPS6435629A - Microprogram control system - Google Patents

Microprogram control system

Info

Publication number
JPS6435629A
JPS6435629A JP19047687A JP19047687A JPS6435629A JP S6435629 A JPS6435629 A JP S6435629A JP 19047687 A JP19047687 A JP 19047687A JP 19047687 A JP19047687 A JP 19047687A JP S6435629 A JPS6435629 A JP S6435629A
Authority
JP
Japan
Prior art keywords
area
access
microprogram
control
storage
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.)
Granted
Application number
JP19047687A
Other languages
Japanese (ja)
Other versions
JPH0740224B2 (en
Inventor
Yoshiyuki Uehara
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP62190476A priority Critical patent/JPH0740224B2/en
Publication of JPS6435629A publication Critical patent/JPS6435629A/en
Publication of JPH0740224B2 publication Critical patent/JPH0740224B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To execute a control of a high level by using a control storage of a small capacity, by using a part of a main storage deice as an extended micro- instruction area, and also, providing a storage limit address register, etc., on a main storage access controller. CONSTITUTION:A part of the main storage device 2 is used as an extended micro-instruction area 20 for extending a microprogram. In this state, a microprogram whose high speed property is not requested especially and a microprogram which does not require a minute hardware control, in the microprogram are described by a micro-instruction, and stored in the area 20. Also, a storage limit address register 31 which stores an address existing on the device 2, and can divide a space on the device 2 into a usual area 21 and the area 20 by this address is provided in a main storage access controller (MAC) 3. In this state, at the time of a usual access of the device 2, when it is detected by a comparator 32 that the area 20 is brought to an access, it is informed to an access origin to be an invalid access, by which the control of a high level can be executed by using a control storage of a small capacity.
JP62190476A 1987-07-31 1987-07-31 Micro program control system Expired - Lifetime JPH0740224B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62190476A JPH0740224B2 (en) 1987-07-31 1987-07-31 Micro program control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62190476A JPH0740224B2 (en) 1987-07-31 1987-07-31 Micro program control system

Publications (2)

Publication Number Publication Date
JPS6435629A true JPS6435629A (en) 1989-02-06
JPH0740224B2 JPH0740224B2 (en) 1995-05-01

Family

ID=16258742

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62190476A Expired - Lifetime JPH0740224B2 (en) 1987-07-31 1987-07-31 Micro program control system

Country Status (1)

Country Link
JP (1) JPH0740224B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6459460B1 (en) 1998-04-03 2002-10-01 Nec Corporation Information display window of electronic appliance

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54152440A (en) * 1978-05-22 1979-11-30 Nec Corp Microprogram controller

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54152440A (en) * 1978-05-22 1979-11-30 Nec Corp Microprogram controller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6459460B1 (en) 1998-04-03 2002-10-01 Nec Corporation Information display window of electronic appliance

Also Published As

Publication number Publication date
JPH0740224B2 (en) 1995-05-01

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