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See also:
User Manual
Computer Specifications
Main System Board
4MB RAM standard on SIMMs; expandable
System memory
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
BIOS on an EPROM; one 64KB CPU-
dependent BIOS in a ROM device
Automatically copies the system BIOS from
Shadow RAM
ROM into RAM; shadow RAM for video
BIOS and external BIOS is software selectable
8KB SRAM; battery-backup
EISA configuration
Real-time clock, calendar, and CMOS RAM
Clock/calendar
for
configuration;
Interfaces
Two RS-232-C ISA compatible,
Serial
asynchronous; 9-pin D-shell connectors
ISA compatible, 25-pin, D-shell connector
Parallel
Mini DIN, 6-pin connector for PS/2
Mouse
compatible mouse or other device
Mini DIN, 6-pin connector for PS/2
Keyboard
compatible keyboard
EISA Series Computers
battery backup
Eight 32-bit EISA expansion slots (16-bit and
Option slots
8-bit ISA compatible); bus-mastering option
cards allowable in slots 1 through 5 and slot 8
Internal; operation and
by software
Controllers
and
Controller on the main
Diskette
supprts up to two diskette drives in any of
tape drive
these formats:
5
5
3
3
Also supports one optional tape drive
Interface on the main system board supports
Hard disk
Processor Board
CPU
486SX/25
microprocessor
486DX/33 board: Intel 80486DX, 33 MHz
microprocessor
Both boards:
processor simulation speeds selectable
through software or keyboard command
Cache memory
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
Math coprocessor
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
300W, fan-cooled, automatic input voltage
Type
sensing, thermally protected
Input ranges
98
47 to 63Hz
Maximum current
At 110 Volts, 6 Amps; at 240 Volts, 3.3 Amps
1/92
EISA Series Tower
volume
system board
360KB
high-density, 1.44MB
double-density, 720KB
board: Intel 80486SX, 25 MHz
simulated 8 MHz and other
to 132 VAC and 196 to 264 VAC,
controllable
Tower-l
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Table of Contents
Related Manuals for Epson EISA Tower
Summary of Contents for Epson EISA Tower
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Page 1: Computer Specifications
EISA Series Tower Eight 32-bit EISA expansion slots (16-bit and Option slots 8-bit ISA compatible); bus-mastering option cards allowable in slots 1 through 5 and slot 8 volume Internal; operation and controllable by software Controllers system board Controller on the main Diskette supprts up to two diskette drives in any of tape drive... -
Page 2: Main System Board Map
EISA Series Tower Maximum outputs Main System Board Map diskette drive hard disk drive * The +12 V peak current is limited to 30 seconds maximum Four main board cables; six mass Output cables system storage cables Option slot power limits I l 12volts -5 Volts -12 Volts... -
Page 3: Processor Board Maps
EISA Series Tower Serial Port Connector (CN3, CN4) Processor Board Maps board 486DX/33 processor Intel 80486DX 33 MH cache module Weitek WTL4167 math microprocessor coprocessor socket (with heat sink) Serial port connector pin assignments Signal Signal Data Carrier Detect Data Set Ready Receive Data Request To sand Transmit Data... - 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 Power Supply Connection Signal P9, Pin 1 +5 VDC P9, Pin 2 +5 VDC...
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Page 5: System Memory Map
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: Hard Disk Drives
(3) Micropolis 1325. Atasi 3085. Lanstor Lan64 Maxtor XT1085, Newbury NDR1085 (4) Micropolis 1323A Miniscribe 3035, Microscience HH1050. Seagate ST4053 (5) Epson IDE drives: 40MB (type 59), 100MB (type 60). 200MB (type 64) (6) The BIOS translates the actual parameters for Cylinders. Heads, and Landing zone to these values. -
Page 7: Simm Installation
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. system diagnostic error codes and messages error / CPU I ROM checksum error 1 Timer counter register error 0103 / Timer counter error 0104... -
Page 8: Information Reference List
Product Support Bulletins None. Documentation Related I 1-3-2 I Wrong memory installation Epson EISA Series Tower 1-3-3 First 64KB RAM chip or data line failure (multi-bit) First 64KB RAM odd/even logic failure 1-34 TM-TOWERT EISA Series Tower, Service Manual Text...