Appendix A

Specifications

CPU and Memory

32-bit CPU

Intel 80486SX/25 microprocessor;

 

upgradable to 486SX/33, 486DX/33,

 

486DX2/50, or 486DX2/66

System speed

Fast and slow speeds available; fast speed

 

is 25 MHz or the speed of your upgraded

 

microprocessor, slow speed is 8 MHz;

 

speed selection through SETUP program

 

and keyboard commands

Memory

4MB RAM standard on a SIMM;

 

expandable to 32MB using 1MB, 4MB,

 

8MB, and 16MB SIMMs; SIMMs must be

 

tin-plated, 72-pin, 36-bit, fast-page mode

 

type with 70ns or faster access speed

ROM

512KB system BIOS, video BIOS, and

 

SETUP code located in EPROM on main

 

system board

Video RAM

512KB DRAM on main system board;

 

expandable to 1MB using 70ns or 80ns

 

44256 DIP chips

Shadow RAM

Supports shadowing of system and video

 

BIOS ROM into RAM

Cache

8KB of internal cache (built into the

 

microprocessor); supports 32KB or 128KB

 

of external cache using 28-pin, 8 x 8,20ns

 

or 25ns DIP chips or 28-pin, 256 x 4,20ns

 

DIP chips

Specifications A-l