Computer Hardware User Manual

Table Of Contents
A
A-1
ASummary of Changes
Introduction
This appendix summarizes the modifications that accompanied the
introduction of the Petra ASIC on the MVME167P and MVME177P
single-board computers. Differences in function and implementation
between previous MVME167 and MVME177 models and the new
MVME1x7P boards are listed in the following table..
Table A-1. List of Changes
Function Previous Implementation MVME1x2P2 Implementation
MCECC memory control MCECC ASIC, revision 00. Petra ASIC, revision 02 (page 3-12).
DRAM DRAM with parity or ECC protection
(MVME167).
DRAM with ECC protection
(MVME177).
SDRAM with ECC protection (page
1-2).
Ethernet interface N82C501AD device. LXT901 device (software-
transparent)
EEPROM sockets Through-hole 44-pin PLCC. Surface-mount 44-pin PLCC.
Serial interface MC14506 device. MAX211E device.
Real-time clock M48T08 device. M48T58 device.
LEDs Through-hole, wave soldered. Surface mount, with light pipes.
SRAM battery Through-hole, dual battery. Surface mount holder.