Dmac registers, Eprom decoder, sram and dma control register, Dmac registers -53 – Motorola MVME1X7P User Manual

Page 143: Eprom decoder, sram and dma control register -53, Table 2-3. dmac command packet format -53

Advertising
background image

LCSR Programming Model

http://www.motorola.com/computer/literature

2-53

2

.

DMAC Registers

This section provides addresses and bit level descriptions of the DMAC
counters, control registers, and status registers. Other control functions are
also included in this section.

EPROM Decoder, SRAM and DMA Control Register

This register controls the snoop control bits used by the DMAC when it is
accessing table entries.

SRAMS

These VMEchip2 bits are not used on the MVME1x7P.

Table 2-3. DMAC Command Packet Format

Entry

Function

0 (bits 0-15)

--

Control Word

1 (bits 0-31)

Local Bus Address

2 (bits 0-31)

VMEbus Address

3 (bits 0-31)

Byte Count

4 (bits 0-31)

Address of Next Command Packet

ADR/SIZ

$FFF40030 (8 bits [6 used] of 32)

BIT

23

22

21

20

19

18

17

16

NAME

WAIT RMW

ROM0

TBLSC

SRAMS

OPER

R/W

R/W

R/W

R/W

RESET

0 PSL

1 PSL

0 PS

0 PS

Advertising