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Block Diagram
3
Graphics Interface
3-8
NVRAM (BBRAM) configuration area specified by boot ROM. That
is, 08003E2xxxxx is stored in NVRAM. At an address of
$FFFC1F2C, the upper four bytes (08003E2x) can be read. At an
address of $FFFC1F30, the lower two bytes (xxxx) can be read. The
MVME1603/MVME1604 debugger, PPCBug, has the capability to
retrieve or set the Ethernet station address.
If the data in the NVRAM is lost, use the number on the label on
backplane connector P2 to restore it.
Refer to Chapter 4 for the pin assignments of the MVME1600-011
front panel 10BaseT connector. Refer to the MVME712M User's
Manual for the pin assignments of the transition module AUI
connector. Refer to the MVME760 User's Manual for the pin
assignments of the transition module AUI and 10BaseT connectors
used in the MVME1600-001 Ethernet implementation. Refer to the
BBRAM/TOD Clock memory map description in the
MVME1603/MVME1604 Programmer's Reference Guide for detailed
programming information.
Note
The MVME1603/MVME1604 will support either AUI or
10BaseT Ethernet connections, but not both at the same
time. To switch from one type to the other, do the
following:
1. Bring the MVME1603/MVME1604 up in PPCBug.
2. Remove the current Ethernet cable and connect the one
you wish to use.
3. Reset the MVME1603/MVME1604 by pressing the
switch or typing the debug command RESET.
RESET
The new connection is automatically recognized by the
LAN controller.
MVME1600-001-based versions of the MVME1603/MVME1604
have a Super VGA (Video Graphics Array) color graphics interface
implemented with a Cirrus Logic CL-GD5434 graphics accelerator.
The CL-GD5434 supports pixel clock rates of up to 110MHz. Its
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