Page printer controller including a single chip superscalar microprocessor with graphics functional units
US5394515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1994 |
| Grant date | Feb 28, 1995 |
| Priority date | — |
| Expiry date | Jun 28, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K2215/0082
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A VLSIC page printer controller includes an instruction processor which responds to a host computer and a printer video processor for accessing data from memory under the control of the instruction processor and serializing data for transfer to a printer through a video port. An I/O interface interconnects the printer controller with an I/O bus to which is connected a host computer, memory devices, and other peripheral devices. An internal memory interface connects the printer controller to memory, and the printer video processor is provided with direct memory access (DMA). Data and instruction caches and an instruction ROM are provided on-chip. A RISC instruction processing unit includes as an integral part thereof the special function circuits of orthogonal rotator, bit/byte mirror, and pixel modification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.