Page 1
EQUITY 386SX/20 PLUS
Computer Specifications
CPU and Memory
CPU
System memory
ROM
Shadow RAM
Cache controller
Math coprocessor
Controllers
Diskette
speed, 20 MHz or simulated 8 MHz
sped, selectable through software
or keyboard command
0 wait state memory access speed at
Memory expandable using
or
(maximum); SIMMs must be fast-page mode,
8ons access
0 wait state access speed; automaticatly
copies both ROM BIOS
32KB
Real-time clock, calendar, and
supports up to two drive in any of four
formats: 5
5
3
3
on main system board
(includes system BIOS and VGA
CMOS RAM for
double-density,
double-density, ROKB; controller
up to
(or faster)
static
highdensity,
system
video ROM into
or
Hard disk
Interfaces
Monitor
serial
Parallel
Keyboard
option slots
Speaker-
Power Supply
Input ranges
Maximum outputs
Mass Storage
Diskette drives
Hard disk drives
supports up to two half-height drives;
embedded controller; interface on main
system board
VGA adapter with
memory) built
up to 640 x
frequency monitor required for resolutiow
D-shell clxlnecta
Standard
Mini DIN,
compatible mouse or other device
Mini DIN,
Four standard input/output expansion slots
(three
ISA
fan-cooled, automatic (worldwide)
input voltage sensing
98 to 132 VAC and 195 to 264 VAC
VDC at 18 Amps,
4.2 Amps
03 Amps
VDC at 6 Amps, peak (10 seconds)
Up to three half-height drives maximum (one
vertical mount and two horizontal mounts)
configurable
types (only horizontal mounts
accessed externally):
5 l/4-inch diskette drive,
3 l/2-inch diskette drive,
5
(double-density) storage capadty
3 l/2-inch
3
up to half-height size;
vertically, second mounted
into main
pixels in
programmable, asynchronous;
parallel,
connector for
keyboard
ISA compatible and
8 MHz bus speed
diskette drive,
form factor hard disk drive(s);
system board;
VDC at
any of the foIlowing drive
=padty
drive,
(video
for
&bit
drive mounted
Equity
Series Computers
3/6/91
386SX/20 PLUS-1
Page 2
EQUITY 386SX/20 PLUS
Keyboard
Detachable, two
Layout
17-key numeric/cursor
additional
(user-definable)
Four levels (normal, shift,
I
Physical Characteristics
Width
15
16.75 inches (419 mm)
Height
weight
6 inches (151 mm)
Single diskette drive model:
20.75 lb (9.4 kg)
keyboard)
QWERTY main
I
pad; 10
pad; 16 function
Serial Port Connector (CN4)
Serial Port
1
I-
2 Recaive
3
4
Data Twmnal
5
Used
lbta
Pin
la
7
To
,
Keyboard and Mouse Connector
Although the keyboard
mouse connectors are physically
identical, they cannot be used interchangeably.
Gmnector Pin Assignnvnfs
Connector Pin Assignments
Parallel Port Connector (CN5)
Pin 13
Pin 25
Port Gmnector Pin Assignments
5
DATA3
7 DATA5
DATA7
*Active Low
14
18
SIGNAL GND
Pin 1
Pin 14
23 SIGNAL
24 SIGNAL
25 SIGNAL
GND
GND
GND
1
2
3
4
5
6
Data
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386SX/20 PLUS-2
3/6/91
Equity Series Computers
Page 3
EQUITY 366SX/20 PLUS
VGA Connector (CN-3)
VGA Connector Pin Assignments
Pin
Red
1
3 Green
3 Blue
4
7
IBluaRdum
Hardware Interrupts
CTRLl I
Unused
I FLlNcrloN
slorul
10
12
14
15
Unused
2
sync
Jumper Settings
The illustration Wow shows the locations of the jumpers on
main system board.
1
s
System Board Jumper Settings
Jumpers
A
Jl
A
I
I
Hard dak wntrollw
I
l
Factory wttings
Equity
Series Computers
PLUS-3
Page 4
EQUITY 386SX/20 PLUS
SIMM lnstallation
The sockets are labelled as shown
an option card is blocking access to the SIMM sockets, remove
option card(s).
Hold the SIMM so the component side is facing the computer’s back
below.
This configuration adds 4MB plus
for a total
plus 512KB
of on-board memory.
Note:
When installing
only constraint
that you must install
1
4
5 (CTRL 2)
7
Floppy
2)
2)
omtrdlor
Hard Disk Drive Types
your computer. Check this tile and the documentation supplied
disk drive(s) installed in your computer. You need to enter this
number when you
Hard disk drive types
the
disk drive configuration in the Setup
Installing Memory Modules
three banks consisting of two sockets each Each socket can contain
SIMM. The type of SIMMs you can install are
You can install SlMMs for a total of
which brings
the
system total to
maximum amount of
of additional memory,
of on-board memory. To
memory, you would install
IMB, or 4MB.
The following is another example of an additional memory
configuration
12
14
15 I
16
ST-506
17
I-
117
I-
17 0
I
I
128
7
I
I
6
I
I
,
---
I 10.3 I
4.6
I
I I ---
1
I
I
I
I
1
386SX/20 PLUS-4
3/6/91
Equity Series Computers
Page 5
EQUITY 386SX/20 PLUS
Hard disk drive types (continued)
Installation / Support Tips
Power
The Equity
between
countries. There is no manual
PLUS
for USA and
a power supply that is switchable
as the power supply is
use, and
for use in other
Notes:
1.
ST125
2. connercP-3044orMiniscn~acl5L4canbeusedastype17
3. For Western Digital
4. Micropolis 1325,
or Drive Maker default setting
Maxtor
5. Micropolis
Miniscribe
6. The landing zone value is 964
7. The factory-installed hard disk drive type for the Equity
PLUS is
number
60
.
I
Equity Series Computers
3/6/91
386SX/20 PLUS-5
Page 6
EQUITY 386SX/20 PLUS
Mouse and Keyboard
When attaching the mouse and keyboard connectors, be
are physically identical, they are not interchangeable.
Installing Floppy Disk Drives
When installing a floppy disk drive as drive B, remember to
set the drive select jumper to the second position and attach
pass-through connector on the floppy drive controller
cable to the drive, not to
the drive does
drive
installed correctly.
Installing Hard Disk Drives
It is recommended that a
be used in the Equity
drive that cannot make use of the internal hard disk controIIer.
Also remember to disable the onboard hard disk cormoIler
when installing such a drive.
If you are having
try starting over with the Unconditional Format option in
diagnostics.
has been correctly selected in SETUP. Also check
any special drivers that may be necessary havebeen
end connector.
function normally, make sure that the
PLUS will boot from drive B when a disk
AT-type hard disk controller
PLUS, if you are installing
in formatting the hard disk drive,
Information Reference List
Engineering Change Notices
Technical Information Bulletins
Product Support Bulletina
Related Documentation
Equity
386%/20 PLUS User’s Guide
a
PLUS Service
PLUS Parts
When installing a hard disk drive, be sure to consult the drive
type tables for the drive type which fits the drive you are
installing. If there is no match for your drive, use the User
Software Problems
Equity 3%5X/20 PLUS,
this does not work properly, try switching to 8MHz for the
installation If you are still unable to load the program at
loading at
When using a software package that uses a
copy-protection method, try loading it at
not work, enable the Auto
Power-on Password
Make sure that you do not forget the
the
and then switching to
option in SETUP.
at
as its
If this does
Password
totheA
If
386SX/20 PLUS-6
3/6/91
Equity Series
Computers
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