EQUITY LT 286e
Computer Specifications
CPU:
8OC286
mkroprwwor,
8/12
MHz
ewltch-selectable
dock speeds
Msth
Copmwuor:
8OC287
support
(optlonal),
8MHz
RAM:
1
MB
(WOKB
standard and
384KB
extended)
IlltrrhCU:
Parallel:
Standard
&blt
parallel; 25
pin, D-type
female connector
SorId:
RS-232C,
programmable. asynchronous;
9 pln, D-type msle connector
vldso:
9pin
female connector supports MDA
CGA,EGA,andextendedEGA
External
dbkstta
drlvo:
15pm,
D-type female connector
4sd.d
ksybosrd:
SpWkw:
Option slot:
MOfnCUy:
Keyboard connector
lntemnl
One
2/3
rlze,
IBM PC AT-compatible slot
lntemsl RAM msrnory card slot allows
expanskm to 2MB;
49pin
male
connector
MOdOllt:
Clock/
Calendar:
Ksybosrd:
Mu8
stcmgr:
Hsrd
Disk:
Dlskstte
drlvos:
Dlsplsy:
internal modem slot; 34-pln male
connector
Real-tlme clock
and
calendar
wfth
battery backup
84 sculpted keys; LCD indicator icons
for Num Lock, Caps Lock, Scroll Lock
Interchangeable, pop-out,
20MB
or
40MB hard disk designed for
low power
consumption;
2Ems
average access
time;
bultt-fn,
16-M bus ATcompatIble
controller
One Internal
1.44MB
3.5’ diskette
drfve;
optbnal,
external 5.25’
(1.2MB)
diskette
drive
Large (640X480 dots),
high
contrast,
paper-white. bnckllt, LCD display with
164wel
gray scale; continuous
brightness and contrast controls;
power-saving
feature.
CRT mode suppotts ECD (enhanced
color
display), monochrome display, color
dlspiay,
and muftlsynccompatlble
CRTs.
External RGB
monltor
supported
(EGA-
compatlbfe) .
Equity Series Computers
Power Supply:
Externally
attached, rechargeable
NlCad
battery pack (4000 mMarnpere
hours); up to
4
hours
12/5-volt
AC
adapter
(can recharge
battery
peck while
operatltv~
computer)
with automatic 1
Wd49V
sensing.
Power
Rsqulrsmonts:
loo-240 VAC,
59/w
Hz.
NlCad
rechergeebie
bettety
pack, 9.6
volts, 4 ampere hours
Envlronmrntsl
Condlttorm:
TOmpwrture:
Operating Range: 41 to 95 degrees F
(5
to 35
degrees
C)
Humidity:
Physical
Dimension:
Optbnr:
Modem:
Mmnory:
Bxpsnrbn
cards:
-VI*
case:
Storage
Range: 4 to 122 degrees F
(-20 to
60
degrees
C)
Operating Range: 29% to
80%
non-condensing
Storage Range: 8% to
80%
non-condensing
Width: 12.9 Inches
(318mm)
Depth: 11.7 Inches (296.5 mm)
(with
handle retracted
Height:
3,46
Inches
(88
mm)
Weight: 16.4
Ibs
(7.4 kg)
(with
battery and hard disk drNe)
internal
2499baud. Hayescompatible.
auto-dial
1
MB RAM expansion cord
One 2/3-size, IBM PC AT-compatible
slot
Soft
wse
for carrying computer
Slide Switches
The
clock slide switch selects between 8MHz and
12MHz.
Slide switch to the left to select
SMHz,
slide to the
right to select
12Mhz.
The CRT/LCD slide switch selects support for either an
external CRT or the LCD. Slide switch to the right for
the LCD, slide to the left to connect an external CRT.
LT286e-1
EQUITY LT 286e
The FDD
EXl/INT
dida
switch enables and disables
support for an
axtamal5.25”
diskette drive. Slide
switch to the left if you plan to connect an external
diskette drive, slide to the right if you do not plan
to
usa
such a drive.
DIP Switches
SW-1
Fu#lon
123488
7-10
x4
l
Notbad-MustbmON
ON l
.%bcIsmhancad
mlofdlqlay
OFF
smurb
momdlrom* 0,
color
ON
l
mmNad-MumbooN
ON
l
Rwmd-MustboON
ON
*
Rwcwd-MumboON
ON
l
sm4cm
rxpMd4d
LCD
moda
DFF
Sitar
standard
LCD
modo
SEE
TABLE
CRT/LCD
CsmfQurti
(below)
CRT/LCD Configuration
Switch-
Function
7
B 9 10
OFF ON OFF OFF Selects MDA (CRT only)
ON OFF OFF ON
selects CGA
40x25
ON OFF OFF OFF
selects CGA 80x25
OFF ON ON ON Salaots EGA normal mode
OFF ON ON OFF
l
!3alaots
EGA enhanced mode
* Factory Settings
LT286e-2
8/l
/@J
Equity Series Computers
SW-2
122428
T-10
ON
ON
OFF
DN
ON
OE=
ON
ON
DFF
SEE
TABLE
Jumper FunoUon
7 8
9 10
ON
OFF
ON
OFF
ON
OFF
ON
*
Enables internal serial port
Disables internal serial port
* Intamal printer port LPTl
Internal printer port
LPTP
*
Enables internal printer port
Disables internal prlntar port
*
Notusad-MustbaON
*
Factory Settings
EQUITY LT 286e
Connector Pin Assignments
Parallel Port Connector
P/N
No.
SW
#ME
1
-
STROBE
2
DATA0
3
DATA1
4
DATA2
5
DATA3
6 DATA4
7
DATA5
6
DATA6
9 DATA?
10
-
ACK
11
+ BUSY
12
+PE
13
+
SLCT
14
-
AUTOFT
15
-
ERROR
16
-
INIT
17
-
SLCTIN
16
GND
19
GND
20 GND
21
GND
22
GND
23
GND
24
GND
25
GND
OIRECTKW
0
0
0
0
0
0
0
0
0
I
I
I
I
I
I
I
I
DESCRIPTKIN
Printer Data
Bit
0
Pnnm Data
Bit
1
Printer
Data
Bit
2
Printer Data
Bit
3
Printer
Oat4
81 4
Prtnter
Data
811
5
Printer Data
Bii
6
Pnnter Data
BiI
7
Ackncwledgs
Pnnter
Busy
End
d
Paper
Pnnmr
Selsct
Auto
Feed
Printer
Error
Printer
Inltlallze
Printer Select
In
Ground
Ground
Ground
Ground
GrOUnd
Ground
Ground
Ground
Serial Port Connector
12345
(E]
6 7
0
9
PIN
No.
SGML
N4ME
DIREOWN
CRDET
.
I
Dam
Cwiw
Do14ct
RXDT
Recwe
DsU
TXDT
b
Transmit Data
DTR
0
Data
Twnwal
Rndy
SG
Signal Ground
DSR
I
Data
SM
RwdV
RTS
0
Requo4t
to Send
CTS
I
Clear
IO
ssnd
RI
I
Rho Indicator
Video Port Connector
PIN
Monochrome
RGB
Enhanced RGB
Ground
Ground
Ground
Ground
Ground S Red
Red
Red
Red
Green
Green
Green
Blue Blue Blue
lntenslty lntensfty S Green
Video
No Con
S Blue
Ii
sync
H Sync H Sync
V
Sync
v sync
V Sync
Keyboard Interface Connector
2
S
o”o
6
0
0 0
3
1
I
DUCRIPTION
Kayhwd
Clock
Keykwd
Data
-Keyboard
RowI
GtWlld
Power l 5v
Equity Series Computers
8/1/89
LT286e-3
EQUITY LT 286e
External Floppy Drive Connector
Pin
1
2
3
4
5
8
7
8
Q
10
11
12
13
14
15
%nd
Mmotlon
Definition
WNDEX
I
External
Index
MDSEL
0
External Drlvo
Soloot
EUOTON 0
External Motor On
EXDIR
0
Extomai
Mrootion
EXSTEP
0
External Stop
EWRDATA
0
External
Writ0
Data
EXWRGATE
0
Extomal
Writ0
Gata
MTRKO
I
G-trrnal
Traok
0
EXWPROT
I
External
Writ0
Protaol
.
EXRDDATA
I
Extomal Road
D8ta
EN-Is1
0
External
Side
Seleot
MDSKCHG
I
Extomai
Disk
Change
GND
Ground
EiHlGH
0
Extomal
High Danlrty
GND
Ground
LT286e-4
W/f39
Equity Series Computers
EQUITY LT 2868
lnstallation/Support Tips
with copy-protection. After the installation, the CPU
canbeswitchedbacktothohlgherspeed.
Power
The
Equity
LT-2880
AC adapter is an auto-sensing unit which
adjust8 automatically between
lCX&240
V,
So/So l-k.
lhmfore,
it can be used anywhere in the world without
ape&l
adjustment.
tfasoftwampaokagedoeanotappeartobe
compatible wifh the
Equity
LT286e, try switching
the CPU speed to 8
MHz
before giving up.
When using the Equity LT288e on battery power,
conservation measures are available and should be
used.
lb3eare:
1)
set the backlight
period
option
tc
the shortest available setting
with SETLCD,
2)
set the brlghtneas and contrast
control8 as low as is
comfortable,
31
run at 8
MHz,
and
4)
use the
HDDPSWE
feature to
automatically turn the HDD off
at times when it is not being
aweawd
constantly.
Periodically, discharge the battery completely. This
will help to minimize the memory effect
encountered with NiCad batteries. After the
complete discharge, give the LT-286e a full,
&hour
recharge. This
will
help to keep battery charge life
aa great as possible.
Video
-
When using the Equity LT-288e with a monochrome
monitor, lf your aoftwam requires that you specify a
display type, select EGA 640 X 350 MONO.
Mass Storage
Be
careful when handling the removable hard
drives.
Unneoessary roughness can set off the
shock indicator.
Software Problems
When installing a copy-protected software package
on the Equity
LT-288e,
sat the the CPU speed to 8
MHz.
This
has been found to have fewer conflicts
Equity Series Computers
8/1/89
LT286e-5
EQUITY LT 286e
(
Information Reference List
(
Engineering Change Notices
None.
Technical Information Bulletins
None.
Product Support Bulletins
None.
Related Documentation
Y19499100100
Equity LT-286e User’s Guide
Yl6699100200
Equity
LT-286e1
MSDOS 4.01 Reference Manual
Y18699100400
Equity
LT-286e
MSDOS 4.01 lnstallation Guide
Y18699100600
Equity
LT-2S6e
MS-DOS 4.01 Shell
User’s
Guide
Ylas9100300
Equity
LT-28Se
MS-DOS 4.01 Command Summary
M-TM-LT286e
Equity
LT-28Se
Service Manual
M-PL-LT286E
Equity
LT-286e
Parts List
Y19499100200
Diagnostics Manual
Y1949QKUX2OO
Equity
LT-286e.
User’s Guide
LT286e-6
Equity Series Computers
/
