Appendix A

Specifications

CPU and Memory

32-bit CPU

Intel 486SW 25 microprocessor;

 

upgradable to 486SXJ 33,486DW 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 keyboard

 

commands or jumper setting

 

To select slow speed, press Ctrl Alt -;to

 

select fast speed, press Ctrl Alt + (use the

 

-or + key on the numeric keypad)

Memory

4MB RAM standard on a SIMM;

 

expandable to 64MB using 4MB, SMB,

 

16MB, and 32MB SIMMs; SIMMs must

 

be tin-plated, 72-pin, 32-bit or 36-bit,

 

fast-page mode type with access speed

 

of 70ns or faster

ROM

128KB 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,

 

256 x 4 bit, 20-pin, DIP DRAM chips

Shadow RAM

Supports shadowing of system and video

 

BIOS ROM into RAM

Specifications A-1