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Appendix D
Specifications
Main System Board
System memory
BIOS
Shadow RAM
EISA configuration 8KB SRAM; battery-backup
RAM
Clock/calendar
lnterfaces
Serial
Parallel
Mouse
4MB RAM standard on SIMMs;
expandable using 1MB, 2MB, 4MB, or 8MB
SIMMs up to 64MB (maximum); SIMMs
must be 70ns, 36-bit, 72-pin, gold-leaded,
fast-page mode type
Two-part system BIOS; one 64KB
permanent BIOS on an EPROM; one 64KB
CPU-dependent BIOS in a FLASH ROM
device
Automatically copies the system BIOS
from ROM into RAM; shadow RAM for
video BIOS and external BIOS is software
selectable
Real-time clock, calendar, and CMOS
RAM for configuration; battery backup
Two RS-232-C, ISA compatible,
asynchronous; 9-pin D-shell connectors
ISA compatible, 25-pin, D-shell connector
Mini DIN, 6-pin connector for PS/2
compatible mouse or other device
Specifications D-1
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