公开(公告)号：CA2135505A1

公开(公告)日：1996-05-10

申请号：CA2135505

申请日：1994-11-09

Applicant: IBM CANADA

Inventor： KAM PATRICK ,  DEVINS ROBERT J ,  HON STEPHEN ,  KELLER EMORY D

IPC: G06F9/455 ,  G06F13/10 ,  G06F13/28 ,  G06F13/38

Abstract: A method and means are provided for simulating a direct memory access (DMA) function to access memory in a host computer having a DMA controller for the purpose of enabling the transfer of data between the host memory and a computer accessory data handling device not capable of DMA operation that can be operably connected to the host including determining the location in the host memory for data to be transferred from the host memory to the accessory data handling device or from the accessory data handling device to the host memory by reading the memory address contents of the DMA controller. Data is read data from the host memory at the address specified in the DMA controller and written to the accessory data handling device or read from the accessory data handling device and written to the host memory at the address specified by the DMA controller, respectively. The host computer is informed that a DMA operation corresponding to the data transfer has been completed when the data transfer required has been completed.

公开(公告)号：CA2135506A1

公开(公告)日：1996-05-10

申请号：CA2135506

申请日：1994-11-09

Applicant: IBM CANADA

Inventor： KAM PATRICK ,  DEVINS ROBERT J ,  HON STEPHEN ,  KELLER EMORY D

IPC: G06F3/16 ,  G06F13/00

Abstract: An audio system is provided for generating audio sound for a host computer. It includes an interface connector for connection with the host computer; an interface controller for communicating with the host computer using the interface connector; a trap adapted to trap audio instruction signals from an application running on the host, such as a game having an audio portion; a trap controller adapted to control the trap; and an audio output. The system operates with an interface communicator which is adapted to respond to a request from the interface controller to read information from the trap and send audio output instruction to the audio output to generate audio sound.