Product information guide

ExpressStation
hard disk
access light
power light
\. /
Shadow RAM
Clock/calendar
diskette
disk&e
access light
release latch
poker
I
reset
button
button
Parallel
cover
screw wrallel oort
power outlet
\
/ ‘/“““on slots
serial
PO*
mouse
’ I
port
keyboard
Doti
Computer Specifications
CPU and Memory
CPU
Intel 25 MHz 486SX, or 33 MHz 486DX
microprocessor; simulated 8 MHz
processor speed selectable through
software or keyboard command
System memory
BIOS
4MB RAM standard on one 4MB SIMM;
expandable using 1MB, 2MB, 4MB, or 8MB
SIMMs up to 32MB (when 8MB SIMMs are
available); SIMMs must be 80ns, 36bit,
72-pin, gold-leaded, fast-page mode type
256KB two-part system BIOS including
video BIOS in two FLASH ROM devices;
write-protection available through jumper
and software
Video RAM
Cache memory
Interfaces
Monitor
1MB standard
8KB internal cache integrated into the
microprocessor; optional 128KB Intel 485
Turbo Cache module can be installed on
main system board (128KB cache module
standard on 486/33 model); write-
through, two-way set associative cache
memory and controller; operation
controllable through software
Math coprocessor
Socket for optional Intel 25 MHz 487SX
coprocessor (allowable on 486SX/25
model only)
serial
SCSI
LAN
Mouse
Keyboard
Option slots
Speaker
Controllers
Diskette
Hard disk
Video
Optional shadow RAM to copy system,
video, or external BIOS information from
ROM to RAM; software selectable
Socketed DS1287 real-time clock, calendar,
and 64-byte CMOS RAM for
configuration; integrated battery with
IO-year life
15-pin, D-shell analog connector; supports
standard VGA, multi-frequency, and high-
resolution monitors
25-pin, D-shell connector; supports IBM
AT compatible or PS/2 compatible
(bidirectional) signals; selectable through
software
Two RS-232-C 9-pin, D-shell connectors;
asynchronous; up to 56K baud rate
Internal connector for SCSI hard disk drive
on drive riser card (single-ended mode
only), terminator soldered onto riser card;
external SO-pin, fine-pitch connector on
back panel for up to seven external SCSI
devices (six if internal device is used);
external SCSI terminator included
One 15-pin AUI (Attachment Unit
Interface) D-sub connector; can connect
external MAU (Medium Attachment Unit)
to provide interface with other networks
One TPE (Twisted Pair Ethernet),
10BASET connector
Mini DIN, 6-pin connector for PS/2
compatible mouse or other pointing device
Mini DIN, 6-pin connector for PS/2
compatible keyboard
Two 32-bit EISA expansion slots (16-bit
and 8-bit ISA compatible) on option card
riser board
Internal speaker integrated into power
supply; programmable at I/O port 61h;
operation controllable through software
Controller on drive riser board supports
one 3.5 inch 1.44MB, third-height diskette
drive
Two interfaces on drive riser board
support either one IDE drive or one
internal SCSI hard disk drive; 3.5inch,
third- or half- height form factor
WD90C30 controller; supports resolutions
up to 1024 x 768 in 256 colors; compatible
with MDA, CGA, Hercules, EGA, and
VGA standards
ExpressStation Computer
11/2/92
ExpressStation-