UM83C002 Datasheet (Unicorn Microelectronics)

UM83C002, RAM Buffer Controller

The RAM B U F F E R C O N T R O LLE R contains three high-speed DMA channels: a host computer address port, dynamic RAM refresh circuitry, and RAM access priority logic.

One of the DMA address counters points inside the buffer RAM for transferring data between the RAM and the disk.

A refresh address

UM83C002 Features

* 3 DMA channels

* Host processor port

* Refresh circuit for dynamic RAM built-in

* RAM access priority network

* Address multiplexing for dynamic RAM

* Multiplexed address and data lines from processor

* Pins arranged for easy integration into 8088/8086 systems

* No