| Patent Number |
Title Of Patent |
Date Issued |
| 4943801 |
Graphics display controller equipped with boundary searching circuit |
July 24, 1990 |
| A graphics display controller equipped with a boundary search circuit is disclosed. There is provided a mask information generator generating mask information consisting of a plurality of bits in response to control data, at least one bit of the mask information taking non-mask data and |
| 4878191 |
Multiplication circuit capable of operating at a high speed with a small amount of hardware |
October 31, 1989 |
| A multiplication circuit comprises a zero detector coupled to a multiplier register so as to generate a signal indicative of completion of the multiplication operation when all of predetermined bits of the multiplier register are zero. A right shifter is coupled to the multiplier registe |
| 4870563 |
Information processing apparatus having a mask function |
September 26, 1989 |
| An information processing apparatus having a mask operation includes a first circuit generating a first mask control signal indicating a start bit position of a data to be processed and a second circuit generating a second mask control signal indicating an end bit position of that data. |
| 4570222 |
Information processor having information correcting function |
February 11, 1986 |
| The invention selectively designates a specific portion of information which is stored in a memory to identify information which is to be corrected. It further enables a correction of only the suitably designated portion. The read out of information having the corrected information is |
| 4545014 |
Information processing apparatus |
October 1, 1985 |
| An information processing apparatus employs first and second direct memory access controllers which cooperate during transfer of information between first and second devices, e.g. memories. The first controller controls information transfer from the first memory to the second controller |
| 4491834 |
Display controlling apparatus |
January 1, 1985 |
| A display control system has a memory for storing display information and a memory access circuit for reading display information out of this memory. This memory access circuit includes a first circuit in which a memory address is set, a second circuit for sequentially varying the memory |
| 4459676 |
Picture image producing apparatus |
July 10, 1984 |
| A picture image producing apparatus has a control unit for designating picture image calculation, a display unit for displaying a picture image, and a processing unit for storing standard information used in the picture image calculation. The standard information is x-coordinate data and |
| 4356482 |
Image pattern control system |
October 26, 1982 |
| An image pattern control system of the type having a dynamic memory which operates during a first period to read and rewrite the contents of memory according to address data sent from an address register and to refresh stored data according to the output of a refresh counter during a |
