Product Information Guide

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EISA Series Tower

Option slots

Controllers

Diskette

and

tape drive

Hard disk

Processor Board

CPU

Computer Specifications

Cache memory

Main System Board

System memory

BIOS

Shadow RAM

4MB RAM standard on SIMMs; expandable

using 1MB, 2MB, 4MB, or 8MB SIMMs up to

64MB (maximum); SIMMs must be 70ns, 36-

bit, R-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 ROM device

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

Parallel

Mouse

Keyboard

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

Mini DIN, 6-pin connector for PS/2

compatible keyboard

Math coprocessor

Eight 32-bit EISA expansion slots (16-bit and

8-bit ISA compatible); bus-mastering option

cards allowable in slots 1 through 5 and slot 8

Internal; operation and

volume

controllable

by software

Controller on the main

system board

supprts up to two diskette drives in any of

these formats:

‘/d

-inch, high-density, 1.2MB

‘/,-inch,

double-density, 360KB

‘/2-inch,

high-density, 1.44MB

‘/2-inch,

double-density, 720KB

Also supports one optional tape drive

Interface on the main system board supports

rInt;o;iDE

drives with embedded

486SX/25

board: Intel 80486SX, 25 MHz

microprocessor

486DX/33 board: Intel 80486DX, 33 MHz

microprocessor

Both boards:

simulated 8 MHz and other

processor simulation speeds selectable

through software or keyboard command

486SX/25 board: 8KB internal cache in the

80486SX microprocessor

486DX/33 board: 8KB internal cache in the

80486DX microprocessor; 64KB Intel

82485MA-33 Turbocache module with write

through, two-way set associative cache

memory and controller

486SX/25 board two sockets available for

optional Weitek WTL4167 and Intel 80487SX

math coprocessors

486DX/33 board: internal coprocessor in the

80486DX and one socket for an optional

Weitek WTL4167 coprocessor

Mass Storage Bays

Up to six half-height devices; two half-height

or one full-height internal bays; four half-

height or one full-height and two half-height

externally-accessible bays

Power Supply

Type

Input ranges

300W, fan-cooled, automatic input voltage

sensing, thermally protected

to 132 VAC and 196 to 264 VAC,

47 to 63Hz

Maximum current

At 110 Volts, 6 Amps; at 240 Volts, 3.3 Amps

EISA Series Computers

1/92

Tower-l

Summary of content (8 pages)

PAGE 1
EISA Series Tower Option slots Eight 32-bit EISA expansion slots (16-bit and 8-bit ISA compatible); bus-mastering option cards allowable in slots 1 through 5 and slot 8 Internal; operation and volume controllable by software Controllers Diskette and tape drive Controller on the main system board supprts up to two diskette drives in any of these formats: 5 ‘/d -inch, high-density, 1.2MB 5 ‘/,-inch, double-density, 3 ‘/2-inch, 360KB high-density, 1.
PAGE 2
EISA Series Tower Maximum outputs Main System Board Map hard disk drive \ diskette drive * The +12 V peak current is limited to 30 seconds maximum Four main system board cables; six mass storage cables Output cables Option slot power limits Maximum current +5 Volts For each slot / 7 Amps For all eight slots 1 20 Amps I l 12volts 1 1.5 Amps 1 2 Amps -5 Volts 0.75 Amps 0.75 Amps -12 Volts 0.75 Amps 0.
PAGE 3
EISA Series Tower Serial Port Connector (CN3, CN4) Processor Board Maps 486DX/33 processor board Weitek WTL4167 math Intel 80486DX 33 MHZ coprocessor socket microprocessor \ (with heat sink) .
PAGE 4
EISA Series Tower Power Supply Connector (CN7) Pin 1 System board power supply connector (CN7) pin assignments Power Supply Connector (CN17) Pin 1 Pin 6 System board power supply connector (CN17) pin assignments Pin 1 2 3 4 5 6 Tower-4 Signal +5 VDC +5 VDC GND GND GND +12 VDC Power Supply Connection P9, Pin 1 P9, Pin 2 P9, Pin 3 P9. Pin 4 P9, Pin 5 P9.
PAGE 5
EISA Series Tower DMA Controller System Memory Map Direct memory access (DMA) improves system performance by allowing devices to access the system memory directly. This ability is provided by two 82C37-compatible direct memory access controllers (DMACs) contained in the 82357. The seven independent 32-bit DMA channels are listed in the table below along with their associated DMA controller and their device assignments.
PAGE 6
EISA Series Tower Hard Disk Drives The following table lists the types of hard disk drives you can use in your computer. Check this table and the manual that came with your hard disk to find the correct type for the hard disk drive(s) installed in your computer. Then select that type at the hard disk drive Type prompt. If you do not find your drive type in the table, select User defined and enter your drive’s parameters.
PAGE 7
EISA Series Tower Error Codes and Messages SIMM Installation The following table lists all the error codes and messages that may appear during System diagnostic testing.
PAGE 8
EISA Series Tower The tables below Power-on diagnostic error tone codes list the possible error messages and tone codes.