Browse Prior Art Database

Co-Processor DMA Controller With Sixteen-Bit Alternate Bus Master Operations

IP.com Disclosure Number: IPCOM000062540D
Original Publication Date: 1986-Dec-01
Included in the Prior Art Database: 2005-Mar-09

Publishing Venue

IBM

Related People

Authors:
Buckton, WL Schwartz, AJ [+details]

Abstract

A microprocessor is used as a 16-bit alternate bus master on a microcomputer bus. The alternate bus master can move data in a direct memory access (DMA) mode without the use of a DMA control chip. This configuration uses a simple set of logic gates for bus isolation and one programmed array logic for control, saving many logic gates over previous designs. The 16-bit bus provides a very fast data transfer rate which by off-loading the data transfer function from the microcomputer's processor allows for faster throughput of data on the system.