[go: up one dir, main page]

JPS5447447A - Loading system for microprogram - Google Patents

Loading system for microprogram

Info

Publication number
JPS5447447A
JPS5447447A JP11267977A JP11267977A JPS5447447A JP S5447447 A JPS5447447 A JP S5447447A JP 11267977 A JP11267977 A JP 11267977A JP 11267977 A JP11267977 A JP 11267977A JP S5447447 A JPS5447447 A JP S5447447A
Authority
JP
Japan
Prior art keywords
signal
ram8
cpu5
order
data
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
JP11267977A
Other languages
Japanese (ja)
Inventor
Kazuharu Ishigaki
Masashi Hino
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 JP11267977A priority Critical patent/JPS5447447A/en
Publication of JPS5447447A publication Critical patent/JPS5447447A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To improve the program maintenance performance by loading the program to RAM, and thus to obtain a low-cost computer system.
CONSTITUTION: External system 1 transmits system reset signal 3 to subsystem 2, and thus CPU5 is reset to the initial state. When signal 3 is turned OFF, CPU5 reads the order of the counter address under the initial state. Thus, reading signal MEMR 21 is delivered through system controller 6 to read out the order and the data to RAM but inhibited to be delivered to RAM8 via NAND gate 18. As a result, signal 21 is delivered to I09 via NOR gate 16. Accordingly, I09 gives a data request to system 1 through interface 4 and transmits the data against the request to CPU5. And CPU5 operates as if the data were read from RAM8 and then repeats this action to carry out the program. In case the order read in is the writing order to RAM8, the contents of DATABUSS10 are written into the address of RAM8 indicated by BUSS11 bia MEMW signal 22
COPYRIGHT: (C)1979,JPO&Japio
JP11267977A 1977-09-21 1977-09-21 Loading system for microprogram Pending JPS5447447A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11267977A JPS5447447A (en) 1977-09-21 1977-09-21 Loading system for microprogram

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11267977A JPS5447447A (en) 1977-09-21 1977-09-21 Loading system for microprogram

Publications (1)

Publication Number Publication Date
JPS5447447A true JPS5447447A (en) 1979-04-14

Family

ID=14592752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11267977A Pending JPS5447447A (en) 1977-09-21 1977-09-21 Loading system for microprogram

Country Status (1)

Country Link
JP (1) JPS5447447A (en)

Similar Documents

Publication Publication Date Title
JPS54114136A (en) Microprogram loading system
JPS55157053A (en) Disc cash write-in control system
JPS5447447A (en) Loading system for microprogram
JPS54122059A (en) Inter-processor information transfer system
JPS5523504A (en) Message communication system in multi-processor
JPS5520546A (en) Peripheral unit controller
JPS5452936A (en) Memroy processor
JPS5474644A (en) Control system of microprogram
JPS55124847A (en) Data processor
JPS5690358A (en) Computer having programmable read-only memory
JPS55154650A (en) Disc cash control system
JPS5582358A (en) Error collection system of central processing unit
JPS5621215A (en) Loading system
JPS5563455A (en) Memory system
JPS5489455A (en) Control system
JPS55157056A (en) Disc cash control system
JPS53136436A (en) Screen-split controller
JPS5510673A (en) Microprogram control data processor
JPS54146547A (en) Microprogram loading device
JPS54141536A (en) Information processing system
JPS5346234A (en) Memory capacity detecting system for main memory unit
JPS51142939A (en) Data processor
JPS5660953A (en) Control storage device
JPS5549739A (en) Picture signal processing unit
JPS5563440A (en) Information processor