Microcomputer PC-card having switching circuit for controlling access to memory based on control signals from internal microprocessor on control signals from external PC
US5671367A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 17, 1995 |
| Grant date | Sep 23, 1997 |
| Priority date | — |
| Expiry date | May 17, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2221/2121
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A memory or PC-cards serve as a large capacity mass memory for replicating floppy disks and other exchangeable magnetic supports. In order to improve these cards, there is added a microprocessor (MPC) with the direct wiring of the operational bus (BD2) of said microprocessor to the card memory (MEM). In this way, the card contains performable programs previously loaded by the computer (PC). Thus, the cards microprocessor functions not only with an internal set program memory, but also with performable programs loaded into the card by the computer. These programs can be modified as needed (provided that the user clearance procedures are respected).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.