JPS5469937A - Address modifying unit - Google Patents

Address modifying unit

Info

Publication number
JPS5469937A
JPS5469937A JP13696777A JP13696777A JPS5469937A JP S5469937 A JPS5469937 A JP S5469937A JP 13696777 A JP13696777 A JP 13696777A JP 13696777 A JP13696777 A JP 13696777A JP S5469937 A JPS5469937 A JP S5469937A
Authority
JP
Japan
Prior art keywords
modification
instruction
register
address modification
load instruction
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
JP13696777A
Other languages
Japanese (ja)
Inventor
Michio Arai
Yasuo Yoshida
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP13696777A priority Critical patent/JPS5469937A/en
Publication of JPS5469937A publication Critical patent/JPS5469937A/en
Pending legal-status Critical Current

Links

Landscapes

  • Executing Machine-Instructions (AREA)

Abstract

PURPOSE: To simplify programs by providing a control circuit for indirect address modification.
CONSTITUTION: When read out to instruction register 11, specific instruction (EXa) for indirect address modification assignment is stored in internal holding resigter 12, and EXa-assigning FF13 is set. As a result, modification mode decoder 14 is actuated and pieces of information classified by kinds for address modification are stored in modification mode register 15. Next, when a load instruction is accumulated in instruction register 11, operand calculation is executed according to this load instruction, but since FF13 is set at this time, modification control circuit 16 attains hardware control for the address modification according to the contents of register 15 during the execution of the load instruction.
COPYRIGHT: (C)1979,JPO&Japio
JP13696777A 1977-11-15 1977-11-15 Address modifying unit Pending JPS5469937A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13696777A JPS5469937A (en) 1977-11-15 1977-11-15 Address modifying unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13696777A JPS5469937A (en) 1977-11-15 1977-11-15 Address modifying unit

Publications (1)

Publication Number Publication Date
JPS5469937A true JPS5469937A (en) 1979-06-05

Family

ID=15187659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13696777A Pending JPS5469937A (en) 1977-11-15 1977-11-15 Address modifying unit

Country Status (1)

Country Link
JP (1) JPS5469937A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01204147A (en) * 1988-02-09 1989-08-16 Toshiba Corp Address qualifying circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01204147A (en) * 1988-02-09 1989-08-16 Toshiba Corp Address qualifying circuit

Similar Documents

Publication Publication Date Title
JPS5743247A (en) Information processing equipment
JPS5469937A (en) Address modifying unit
JPS5423343A (en) Microprogram controller
JPS5474337A (en) Microprogram controller
JPS5392638A (en) Information processing unit
JPS5617402A (en) Programmable sequence controller
JPS5576446A (en) Pre-fetch control system
JPS5469938A (en) Indirect-address modifying unit
JPS5668848A (en) Memory control unit
JPS5687142A (en) Sequence control system for rom address
JPS5794844A (en) Data processor
JPS5448459A (en) Control unit of instruction advance fetch
JPS5475233A (en) Memory controller
JPS5451437A (en) Instruction control system for multi-stage advance
JPS5668878A (en) Data processor
JPS5475961A (en) Microprogram address control system
JPS5599652A (en) Microprogram control unit
JPS5417641A (en) Microprogram controller
JPS5497342A (en) Microprogram control system
JPS5447455A (en) Data processor
JPS5769308A (en) Scan-type programmable logic controller
JPS5510659A (en) Data processor
JPS55124853A (en) Memory extension system for information processor
WO1996008763A3 (en) Method, apparatus and instruction for performing a double jump register indirect operation transfer in a microcontroller
JPS54120547A (en) Microprogram memory controller