EQUITY 486DX2/50 PLUS

 

 

 

 

 

 

 

 

EQUITY 486SX/25 PLUS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Controllers

 

 

 

 

 

 

 

 

Diskette

Supports up to two drives in any of four

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

formats: 5%inch, highdensity, 1.2MB;

 

 

 

 

 

 

 

 

5%inch, double-density, 360KB;

 

 

 

 

 

 

 

 

3%inch, highdensity, 144MB; or

 

 

 

 

 

 

 

 

31h-inch, double-density, 720KB; also

 

 

 

 

 

 

 

 

supports optional Epson tape drive;

 

 

 

 

 

 

 

 

controller on main system board

 

 

 

 

 

 

 

Hard disk

Supports up to two half-height drives;

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

embedded IDE controller; interface on main

 

 

 

 

 

 

 

 

system board

Computer Specifications

CPU and Memory

32-bit CPU

25

MHz system: 804865X processor,

 

50

MHz system: 80486DX2/50 processor

System speed 25MHzregardlessofCPU;for80486DX2/50, 50 MHz speed is internal only; 8 MHz speed is simulated by inserting wait states; high/low speed selection through software or keyboard comman d; 0 wait state memory access at high speed

Interfaces

Monitor

Serial

Parallel

Mouse port

Keyboard

Option slots

VGA adapter with 1MB DRAM (video memory) built into main system board; supports up to 800 x 600 or 1024 x 768 pixels in &colors or up to 640 x 480 pixels in 256-colors; multi-frequency monitor required for resolutions over 640 X 480

15-pin, D-shell connector

RS232C, programmable, asynchronous; 9-pin, D-shell connector

Standard &bit parallel, mono-directional; 25-pin, D-shell connector

Mini DIN, 6-pin connector for PS/2 compatible mouse or other device

Mini DIN, 6-pin connector for F’S/2 compatible keyboard

Six standard input/output expansion slots (five 16&t ISA compatible and one &bit ISA compatible); 8 MHz bus speed

Internal; operation controllable by the Setup program

System memory

4MB RAM standard soldered onto memory board; base memory of 256KB, 512KB or 640KB selectable through jumpers.

Memory expandable using 256KB or IMB SIMMS, up to 16MB (maximum); SIMMs must be fast-page mode, 80ns access speed (or faster)

Power Supply

Type

Input ranges

Maximum outputs

2OOW, fan-cooled, automatic (worldwide) input voltage sensing

98 to 132 VAC and 195 to 264 VAC

+5 VDC at 22 Amps, +12 VDC at

6.8 Amps

ROM

128KB (includes system BIOS and VGA BIOS)

-12 VDC at .50 Amps, -5 VDC at so Amps

Shadow RAM

0 wait state acceSS speed; automatically

 

copies both ROM BIOS and video ROM

 

intoRAM

Math coprocessor

Standard for 50 MHz model; on 25 MHz

 

model, 80486SX microprocessor can be

 

replaced with optional 80487SX chip

Cache controller

82385 (25MHz) standard

Cache RAM

32KB high-speed (251-u) static RAM; two-

 

way set associative.

Clock/calendar

Real-time clock, calendar, and

 

50-byte CMOS RAM for configuration;

 

battery backup

Mass Storage Bays

Up to five drives maximum

Internal drive bay Two half-height or one full-height drives

Externally-accessible One third-height and two half-height drives

drive bayor one third-height and one full-height drives

Equity Series Computers

5/12/92

486DX2/50 & 486SX/25 PLUS-l