JPS55118165A - Data processor possessing extended memory - Google Patents
Data processor possessing extended memoryInfo
- Publication number
- JPS55118165A JPS55118165A JP2601479A JP2601479A JPS55118165A JP S55118165 A JPS55118165 A JP S55118165A JP 2601479 A JP2601479 A JP 2601479A JP 2601479 A JP2601479 A JP 2601479A JP S55118165 A JPS55118165 A JP S55118165A
- Authority
- JP
- Japan
- Prior art keywords
- common
- region
- data processor
- selection signal
- extended memory
- 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
- Executing Machine-Instructions (AREA)
Abstract
PURPOSE: To increase the capacity of the common region by supplying the selection signal for the data processor which extends the memory by means of the bank register and in case the access requester unit has the access to the common region.
CONSTITUTION: The order fetch signal given from CPU7 is decoded by memory access controller 10 to select one of register's extended common regions 6-0 and 6-1. The selection of the common regions is indicated by selection signal IFETCH, and thus the capacity can be made double for the common region. At the same time, the data to be used in common is stored within region 6-1 along with the resident program within region 6-0. As a result, the fetch signal can be used directly as the selection signal.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2601479A JPS55118165A (en) | 1979-03-06 | 1979-03-06 | Data processor possessing extended memory |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2601479A JPS55118165A (en) | 1979-03-06 | 1979-03-06 | Data processor possessing extended memory |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55118165A true JPS55118165A (en) | 1980-09-10 |
Family
ID=12181830
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2601479A Pending JPS55118165A (en) | 1979-03-06 | 1979-03-06 | Data processor possessing extended memory |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55118165A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58137064A (en) * | 1982-02-08 | 1983-08-15 | Fujitsu Ltd | Address extension system |
-
1979
- 1979-03-06 JP JP2601479A patent/JPS55118165A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58137064A (en) * | 1982-02-08 | 1983-08-15 | Fujitsu Ltd | Address extension system |
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