System and method for positional control device data source selection
US5754828A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 1995 |
| Grant date | May 19, 1998 |
| Priority date | — |
| Expiry date | Jul 31, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/102
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A technique for emulating a computer game port uses a memory manager software program to detect output instructions from a computer software program to the game port. In response to the detected output instruction, the memory manager diverts program operation to an interrupt routine wherein position data is read from a data frame and one or more game port delay times are calculated to correspond with the position of the selected positional control device. The delay times correspond with the delay times of a conventional analog joystick coupled to a conventional game port. The memory manager also detects input instructions from computer software program to the game port and diverts the computer software program to an interrupt servicing routine in which the emulated delay times are used to load a data register that is read by the computer software program. The data bits in the data register correspond to the delay time bits and are initially set to a first logic level during the delay time period, and reset after the expiration of the delay time period. In this manner, any positional control device can be used to provide position data to emulate a computer game port. The computer ma…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.