JPH03164848A - I/o access system - Google Patents

I/o access system

Info

Publication number
JPH03164848A
JPH03164848A JP30210689A JP30210689A JPH03164848A JP H03164848 A JPH03164848 A JP H03164848A JP 30210689 A JP30210689 A JP 30210689A JP 30210689 A JP30210689 A JP 30210689A JP H03164848 A JPH03164848 A JP H03164848A
Authority
JP
Japan
Prior art keywords
data
iowc1
outputted
written
cpu
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
JP30210689A
Other languages
Japanese (ja)
Inventor
Kenichi Saito
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 Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP30210689A priority Critical patent/JPH03164848A/en
Publication of JPH03164848A publication Critical patent/JPH03164848A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To increase the I/O access speed by holding data from a central processing unit (CPU) and continuously writing data in a register in an I/O device with one access from the CPU to the I/O device.
CONSTITUTION: After data A is outputted to a data bus 31, an I/O control signal generating circuit 201 outputs an I/O write signal (IOWC1) 22 to write data A in an I/O device LSI 17. The I/O control signal generating circuit 201 outputs the I/O write signal (IOWC1) 22 while data B is outputted to a data bus 31, and data B is written in the I/O device LSI 17. In the same manner, the I/O control signal generating circuit 201 outputs the I/O write signal (IOWC1) 22 while data C is outputted to the data bus 31, and data C is written in the I/O device LSI 17. Thus, data is written in the I/O device LSI 17 three times with one access of a CPU 10.
COPYRIGHT: (C)1991,JPO&Japio
JP30210689A 1989-11-22 1989-11-22 I/o access system Pending JPH03164848A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30210689A JPH03164848A (en) 1989-11-22 1989-11-22 I/o access system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30210689A JPH03164848A (en) 1989-11-22 1989-11-22 I/o access system

Publications (1)

Publication Number Publication Date
JPH03164848A true JPH03164848A (en) 1991-07-16

Family

ID=17905006

Family Applications (1)

Application Number Title Priority Date Filing Date
JP30210689A Pending JPH03164848A (en) 1989-11-22 1989-11-22 I/o access system

Country Status (1)

Country Link
JP (1) JPH03164848A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7782512B2 (en) 2007-09-04 2010-08-24 Sony Corporation Light irradiation device, fine particle analyzing apparatus, and light irradiation method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7782512B2 (en) 2007-09-04 2010-08-24 Sony Corporation Light irradiation device, fine particle analyzing apparatus, and light irradiation method

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