JPS5549749A - Microprogram control data processing system - Google Patents
Microprogram control data processing systemInfo
- Publication number
- JPS5549749A JPS5549749A JP12336878A JP12336878A JPS5549749A JP S5549749 A JPS5549749 A JP S5549749A JP 12336878 A JP12336878 A JP 12336878A JP 12336878 A JP12336878 A JP 12336878A JP S5549749 A JPS5549749 A JP S5549749A
- Authority
- JP
- Japan
- Prior art keywords
- address register
- data
- byte
- increased
- width
- 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 make data read high-speed by providing a buffer register having a width larger than the bus width in the data bus line.
CONSTITUTION: Data read from main storage device 1 and the buffer register on the data bus line are defined as two-byte width and three-byte width, respectively. It is found that the start of read data is on the word boundary of one-word two bytes if contents of address register 2 are even and the start above is in the middle of boundaries if odd. When contents of address register 2 are even and read data has a three-byte length, two bytes are set by the first access, and address register 2 is increased by 2, and next, one byte is set, and address register 2 is increased by 1. When contents of address register 2 are odd, one-byte components of data are set, and address register 2 is increased by 1, and after that, two-byte components of data are set continuously, and address register 2 is increased by 2.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12336878A JPS5549749A (en) | 1978-10-06 | 1978-10-06 | Microprogram control data processing system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12336878A JPS5549749A (en) | 1978-10-06 | 1978-10-06 | Microprogram control data processing system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5549749A true JPS5549749A (en) | 1980-04-10 |
Family
ID=14858843
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12336878A Pending JPS5549749A (en) | 1978-10-06 | 1978-10-06 | Microprogram control data processing system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5549749A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60114895A (en) * | 1983-11-25 | 1985-06-21 | 富士通機電株式会社 | Fluid sign display unit |
JPS63196967A (en) * | 1987-02-10 | 1988-08-15 | Fujitsu Ltd | Data transfer control equipment |
-
1978
- 1978-10-06 JP JP12336878A patent/JPS5549749A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60114895A (en) * | 1983-11-25 | 1985-06-21 | 富士通機電株式会社 | Fluid sign display unit |
JPS63196967A (en) * | 1987-02-10 | 1988-08-15 | Fujitsu Ltd | Data transfer control equipment |
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