Direct interface between fuel pump and computer cash/register
US5299135A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1993 |
| Grant date | Mar 29, 1994 |
| Priority date | — |
| Expiry date | Jun 18, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07G1/14
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An interface unit for interfacing a peripheral bus of a computer system with a dispensing system for dispensing a material, such as gasoline, and which includes a plurality of dispensers for controlling the dispensing of the material. The interface unit includes a controller and a first communication link for providing bidirectional communication between the controller and the material dispensers. A second communication link is connected with an internal bus on the interface unit and the peripheral bus of the computer system to provide bidirectional communication between the controller and the computer system. The second communication link includes a window memory for storing code and a bus interface. The bus interface includes an access control port for communicating access codes between the peripheral bus and the controller and a memory control for selectively connecting either the internal bus or the peripheral bus with the window memory in a manner that only one of the controllers and the peripheral bus may access the window memory at a time. A database of dispensing data collected from the plurality of dispensers is defined in a controller memory. Polling commands are sent fro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.