System for interfacing ISA compatible computer devices with non-

Details System for interfacing ISA compatible computer devices with non- System for interfacing ISA compatible computer devices with non-

1997-01-31

1999-09-21

Lee, Thomas C.

Electrical computers and digital data processing systems: input/

Input/output data processing

Direct memory accessing

710 26, 710 27, 710 28, G06F 1328

Patent

active

059548029

ABSTRACT:
A system and method that allows ISA-compatible DMA devices (60) to communicate over non-ISA buses such as the VL bus (20) and a PCI bus (30). In a computer system (10) with a non-ISA bus, the present invention couples a secondary set of DMA controllers (50) in the same input/output space and a glue logic circuit (70) to the non-ISA bus in the computer system (10) to allow the ISA-compatible DMA device (60) to operate over the non-ISA bus. The secondary set of DMA controllers (50) provides the support for an ISA-compatible DMA device (60) to perform DMA transactions and the glue logic circuit (70) directs the DMA controller accesses to the proper place in the computer system (10).

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