JPS54161856A - Starting method of microprocessor - Google Patents
Starting method of microprocessorInfo
- Publication number
- JPS54161856A JPS54161856A JP7167278A JP7167278A JPS54161856A JP S54161856 A JPS54161856 A JP S54161856A JP 7167278 A JP7167278 A JP 7167278A JP 7167278 A JP7167278 A JP 7167278A JP S54161856 A JPS54161856 A JP S54161856A
- Authority
- JP
- Japan
- Prior art keywords
- gate
- program
- output
- starting time
- rom
- 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
Links
Abstract
PURPOSE: To continue the program execution in the normal memory space by replacing the addresses between the RAM region containing the memory start address and the ROM region containing the control program of the system at the starting time for execution of the program and then having reload under programing.
CONSTITUTION: Memory space 40 is divided into three RAM's and one ROM regions each of which is selected through address control gates 10W13. The memory region is converted at FF50 and reset with the signals of starting time. The start address of the starting time is 0000 with the selection signals delivered from gate 10 and does not enter RAM40 via AND gate 20 with output Q of FF50. While the output of gate 12 is supplied to ROM via OR gate 30 with output Q- of FF50, and the processor operates based on the program stored. In such constitution, the RAM region can be set regardless of the start address.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7167278A JPS5858701B2 (en) | 1978-06-13 | 1978-06-13 | How to start a microprocessor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7167278A JPS5858701B2 (en) | 1978-06-13 | 1978-06-13 | How to start a microprocessor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS54161856A true JPS54161856A (en) | 1979-12-21 |
JPS5858701B2 JPS5858701B2 (en) | 1983-12-27 |
Family
ID=13467305
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7167278A Expired JPS5858701B2 (en) | 1978-06-13 | 1978-06-13 | How to start a microprocessor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5858701B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6254349A (en) * | 1985-09-02 | 1987-03-10 | Nec Corp | Address modification system |
US7136965B2 (en) | 2000-08-07 | 2006-11-14 | Nec Corporation | Microcomputer |
-
1978
- 1978-06-13 JP JP7167278A patent/JPS5858701B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6254349A (en) * | 1985-09-02 | 1987-03-10 | Nec Corp | Address modification system |
US7136965B2 (en) | 2000-08-07 | 2006-11-14 | Nec Corporation | Microcomputer |
Also Published As
Publication number | Publication date |
---|---|
JPS5858701B2 (en) | 1983-12-27 |
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