JPS649528A - Function control system by mask register - Google Patents
Function control system by mask registerInfo
- Publication number
- JPS649528A JPS649528A JP62166017A JP16601787A JPS649528A JP S649528 A JPS649528 A JP S649528A JP 62166017 A JP62166017 A JP 62166017A JP 16601787 A JP16601787 A JP 16601787A JP S649528 A JPS649528 A JP S649528A
- Authority
- JP
- Japan
- Prior art keywords
- machine type
- mask register
- computer
- circuit
- processor
- 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
Landscapes
- Memory System Of A Hierarchy Structure (AREA)
Abstract
PURPOSE:To operate an old software on the computer of a new type by controlling the validity/invalidity of a hard ware mechanism by a mask register circuit, storing information indicating the machine type of the computer by a machine type discriminating circuit, reading the machine type information of the machine type discriminating circuit and writing a value to the mask register circuit by a processor. CONSTITUTION:The hard ware mechanism 3-i for realizing a function, the mask register circuit 2-i for controlling the validity/invalidity of the hard ware mechanism 3-i, the machine type discriminating circuit 4 for holding the information indicating the machine type of the computer and the processor 1 are provided and the processor can read the contents of the machine type discriminating circuit 4 and set the value of the mask register circuit 2-i. Namely, in a step for preparing the software, the processor reads the machine type information of the machine type discriminating circuit 4 and sets the values to the respective mask register circuits 2-1, 2-2, 2-3 based on the number of editions of the machine type information and the software. Thereby, the old software can be executed on the computer of the new machine type having the new function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62166017A JPS649528A (en) | 1987-07-02 | 1987-07-02 | Function control system by mask register |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62166017A JPS649528A (en) | 1987-07-02 | 1987-07-02 | Function control system by mask register |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS649528A true JPS649528A (en) | 1989-01-12 |
Family
ID=15823369
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62166017A Pending JPS649528A (en) | 1987-07-02 | 1987-07-02 | Function control system by mask register |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS649528A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130142563A1 (en) * | 2011-12-01 | 2013-06-06 | Takuya Sumi | Portable working machine |
| US9333636B2 (en) | 2010-06-10 | 2016-05-10 | Makita Corporation | Work machine having main pole |
| JP2018522335A (en) * | 2015-07-27 | 2018-08-09 | ソニー インタラクティブ エンタテインメント アメリカ リミテッド ライアビリテイ カンパニー | Backward compatibility due to algorithm alignment, feature disablement, or performance limitations |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59223855A (en) * | 1983-06-02 | 1984-12-15 | Fujitsu Ltd | Constitution and control system of data processing system |
-
1987
- 1987-07-02 JP JP62166017A patent/JPS649528A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59223855A (en) * | 1983-06-02 | 1984-12-15 | Fujitsu Ltd | Constitution and control system of data processing system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9333636B2 (en) | 2010-06-10 | 2016-05-10 | Makita Corporation | Work machine having main pole |
| US20130142563A1 (en) * | 2011-12-01 | 2013-06-06 | Takuya Sumi | Portable working machine |
| JP2018522335A (en) * | 2015-07-27 | 2018-08-09 | ソニー インタラクティブ エンタテインメント アメリカ リミテッド ライアビリテイ カンパニー | Backward compatibility due to algorithm alignment, feature disablement, or performance limitations |
| JP2021077408A (en) * | 2015-07-27 | 2021-05-20 | ソニー・インタラクティブエンタテインメント エルエルシー | Backward compatibility by algorithm matching, disabling features, or performance limitation |
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