JPS5624625A - Automatic initial program load system - Google Patents
Automatic initial program load systemInfo
- Publication number
- JPS5624625A JPS5624625A JP9872779A JP9872779A JPS5624625A JP S5624625 A JPS5624625 A JP S5624625A JP 9872779 A JP9872779 A JP 9872779A JP 9872779 A JP9872779 A JP 9872779A JP S5624625 A JPS5624625 A JP S5624625A
- Authority
- JP
- Japan
- Prior art keywords
- ipl
- main memory
- read
- data
- function
- 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
Links
Abstract
PURPOSE: To easily follow the change of the machine type of I/O without exclusively using the main memory space for ROM, by taking the data to the main memory by IPL read function from ROM.
CONSTITUTION: The microprogram sets such instruction as to make general I/O non-responsive to the function register 8, that is, IPL (Initial Program Load) read instruction is set to perform the data transfer. Then, IPL function decoder 40 detects this IPL read instruction and outputs the receiving signal 40b and DVA (Device Address) specifying signal Ie-1 of IPL object I/O module 12 and AND are taken to make effective ROM44 in which IPM program is stored and IPL istruction of one word read from ROM44 is stored in the main memory 11 through the data buffer 46 and the data bus 1b. The above mentioned procedure is repeated.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9872779A JPS5624625A (en) | 1979-08-03 | 1979-08-03 | Automatic initial program load system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9872779A JPS5624625A (en) | 1979-08-03 | 1979-08-03 | Automatic initial program load system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5624625A true JPS5624625A (en) | 1981-03-09 |
Family
ID=14227548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9872779A Pending JPS5624625A (en) | 1979-08-03 | 1979-08-03 | Automatic initial program load system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5624625A (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49122241A (en) * | 1973-03-22 | 1974-11-22 | ||
JPS524138A (en) * | 1975-06-30 | 1977-01-13 | Hitachi Ltd | Initial program writing system of calculator |
JPS5344134A (en) * | 1976-10-04 | 1978-04-20 | Oki Electric Ind Co Ltd | Microprogram control system |
JPS5437646A (en) * | 1977-08-31 | 1979-03-20 | Toshiba Corp | Program loading system |
JPS5472642A (en) * | 1977-11-22 | 1979-06-11 | Toyoda Machine Works Ltd | Program writer for computer |
-
1979
- 1979-08-03 JP JP9872779A patent/JPS5624625A/en active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS49122241A (en) * | 1973-03-22 | 1974-11-22 | ||
JPS524138A (en) * | 1975-06-30 | 1977-01-13 | Hitachi Ltd | Initial program writing system of calculator |
JPS5344134A (en) * | 1976-10-04 | 1978-04-20 | Oki Electric Ind Co Ltd | Microprogram control system |
JPS5437646A (en) * | 1977-08-31 | 1979-03-20 | Toshiba Corp | Program loading system |
JPS5472642A (en) * | 1977-11-22 | 1979-06-11 | Toyoda Machine Works Ltd | Program writer for computer |
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