Appendix D

Specifications

Main System Board

System memory

4MB RAM standard on SIMMs; expandable

 

using lMB, 2MB, 4MB, or 8MB SIMMs up

 

to 64MB (maximum); SIMMs must be

 

70ns, 36-bit, 72-pin, gold-leaded, fast-page

 

mode type

BIOS

Two-part system BIOS; one 64KB

 

permanent BIOS on an EPROM; one 64KB

 

CPU-dependent BIOS in a FLASH ROM

 

device

Shadow RAM

Automatically copies the system BIOS

 

from ROM into RAM; shadow RAM for

 

video BIOS and external BIOS is software

 

selectable

EISA configuration 8KB SRAM; battery-backup

Clock/calendar

Real-time clock, calendar, and CMOS RAM

 

for configuration; battery backup

Interfaces

 

Serial

Two RS-232-C, ISA compatible,

 

asynchronous; 9-pin D-shell connectors

Parallel

ISA compatible, 25-pin, D-shell

 

connector

Specifications D-l