Specifications

Chapter 9
DMA CONTROLLER (V40)
Contents Page
OVERVIEW ..................................................... 9-2
ZT 8832 SPECIFICS
............................................. 9-3
FUNCTIONAL DESCRIPTION
................................... 9-4
Internal Bus Interface
......................................... 9-5
Address Register
............................................. 9-5
Address Adjuster
............................................. 9-5
Count Register
............................................... 9-6
Count Adjuster
............................................... 9-6
Control Registers
............................................. 9-6
PROGRAMMABLE REGISTERS
................................. 9-7
DMA Initialize Command (DICM)
............................. 9-8
DMA Channel (DCH)
........................................ 9-8
DMA Base Count/Current Count (DBC/DCC)
.................. 9-10
DMA Base Address/Current Address (DBA/DCA)
.............. 9-11
DMA Device Control (DDC)
................................. 9-12
DMA Mode (DMD)
......................................... 9-13
DMA Status (DST)
.......................................... 9-15
DMA Mask (DMK)
......................................... 9-16
OPERATION
................................................... 9-17
Reset
...................................................... 9-17
Autoinitialization
............................................ 9-18
Programming
............................................... 9-18
9-1