JPS55159247A - Address modification system - Google Patents
Address modification systemInfo
- Publication number
- JPS55159247A JPS55159247A JP6588079A JP6588079A JPS55159247A JP S55159247 A JPS55159247 A JP S55159247A JP 6588079 A JP6588079 A JP 6588079A JP 6588079 A JP6588079 A JP 6588079A JP S55159247 A JPS55159247 A JP S55159247A
- Authority
- JP
- Japan
- Prior art keywords
- address
- register
- decimal point
- mask circuit
- bit
- 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 enable high speed table index, by taking the effetive bit in the address as the displacement in the table and replacing the ineffective bit into the table address.
CONSTITUTION: The mask circuit 4 produces the signal to distinguish the floating decimal point data/fixed decimal point data from the control line 6 and the address stored in the input data stored in the input data register 1 according to the content of the base address register 2 and the master register 3. The address converted with this mask circuit 4 is set to the memory address register 5. Further, the mask circuit 4 selects the number of bits represented in the register 3 as the numeral at LSB side in the memory address from the LSB side of the mantissa in the fixed or floating decimal point number and selects it from the bit corresponding to the register 2 as the numeral at MSB of the address to constitute the memory address.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6588079A JPS55159247A (en) | 1979-05-28 | 1979-05-28 | Address modification system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6588079A JPS55159247A (en) | 1979-05-28 | 1979-05-28 | Address modification system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS55159247A true JPS55159247A (en) | 1980-12-11 |
Family
ID=13299724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6588079A Pending JPS55159247A (en) | 1979-05-28 | 1979-05-28 | Address modification system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55159247A (en) |
-
1979
- 1979-05-28 JP JP6588079A patent/JPS55159247A/en active Pending
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