Download Epson Equity LT Product Information Guide

EQUITY LT
Switch Settings
Computer Specifications
I
The CPU SPEED switch selects between 4.77 MHz and 10
CPU:
NEC V30 dual-speed m1croprocess0r.
4.77 or 10 MHz Switch selectable
clock speeds. 20-b,, address bus and
16.blf data bus
RAM:
ROM:
Floppy Disk
Controller:
640KB on man system board
16KB. ,n two sockets
Expansion Slots:
Speaker:
Clock/Calendar
RAM:
Keyboard:
Power:
Video Controller
and Screen:
Mass storage:
Standard:
Standard:
Interfaces:
Standard:
Standard:
Standard:
Standard:
MHz. When the computer is running at 4.77 MHz, the power
light is orange, and at 10 MHz, the light is green.
The CPU SPEED switch is located above the keyboard.
Supports two tnfernal 35 (720KB)
dwes and one external 5 25” (360KB)
drive
Two expansron slots (proprietary)
Internal. programmable
64 Bytes of CMOS RAM lor real-llme
clock. calendar, and system
cont,gurat,on w,th battery backup
P,op,,e,ary, full-functmn. 65 keys,
separate numer~clcursor pad
N,Cad rechargeable battery and
siandard 1101220 AC adaptor
Num
Lock
Superlwf or super,wsl backlit LCD,
external CGA momtor port opflonal
Two. 3.5 half-height floppy disk
dwes. 720KB storage capacity
35- half-helgh, floppy disk dwe and
20MB hard disk drive
LCD DIP Switch Settings
Environmental
Conditions:
Temperature
Humidity:
Physical
Dimensions:
Screen Type:
LCD Color:
Size (Active Area):
Aspect Ratio:
Graphrcs
Resolution:
Character
Drsplav:
S&&able View
Anglellnverse
Video:
Adjustable
Brightness:
Power Saver
Feature:
Equity LT Options:
1
3
4
LCD Normal
LCD Reverse
LCD Screen Mode 0
OFF
ON
ON
LCD Screen Mode 1
ON OFF
OFF ON
OFF OFF
Wldlh -13 6 I”
Depth -12 2 I”
Height- 3 1 I”
Waghi- 12 6 Ibs
(Dual floppy disk drive conhguratlon)
Rellectlve
YdOW
95 x 4 1
14to1
2
ON
Operating Range 41~ to 90°F
(50 to 35%)
Storage Range -4O to 12Z°F
(-20” lo 6OOC)
Operating Range 20% 10 60%
non-condensing
storage Range 10% to 90%
non-condensmg
Display Options:
Functions
Switches
Centronlcs’-compatible parallel port
RS-232C compattble serial port
5 25 floppy disk dwe port
Exlernal CGA port
LCD Screen Mode 2
LCD Screen Mode 3
ON
OFF
Select LCD
Select RGB color monitor
Supertwist
Backlit LCD
Transmlsslve
Blue
95’ x 41
14101
640 x 200
640 Y 200
80 x 25
60 x 25
Y=?S
Yes
NO
Yes
NO
Yes
Internal 30011200 baud modem
13 CGAcolordlsplay(640 x 200dots)
carrying case
Cigarette lighter adaptor
Screen d,splays
Supertwsl LCD dnsplay
Supertwsl Backltt LCD display
Equity Series Computers
12/12/88
EQLT - 1
J
EQUITY LT
PIN NO. SIGNAL NAME DIRECTION
DESCRIPTION
1
Strobe
Printer Data 0
Printer Data 1
Printer Data 2
Printer Data 3
Printer Data 4
Printer Data 5
Printer Data 6
Printer Data 7
Acknowledge
Printer Busy
Paper End
Printer Select
Auto Feed
Printer Error
Printer Initialize
Printer Select
Ground
-STROBE
DATA0
DATA1
DATA2
DATA3
DATA4
DATA5
DATA6
DATA7
-ACK
BUSY
:
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18-25
Back Panel DIP Switch Settings
Functions
Switches
12
3
4
ZCT
-AUTOFD
-ERROR
-1NIT
-SLCTIN
GND
0
ii
0
0
i
0
0
I
I
I
I
I
I
I
I
Serial Port Connector
Use external diskette drive
3N
Use parallel printer
3FF
O N
External diskette drive is B
OFF
External diskette drive is A
PIN NO. SIGNAL NAME DIRECTION
O N
1 FDD
1
OFF
2 FDDs
O N
Serial port is secondary
OFF
Serial port is primary
:
4
z
L
9
CRDET
RXDT
TXDT
DTR
SG
DSR
RTS
CTS
RI
I
DESCRIPTION
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request to send
Clear to Send
Ring Indicator
I
i
:,
I
I
Monitor Connector
System Board Jumper Adjustment
Jumper 5 is used to control the LED showing drive access
for the left-hand drive.
In position A, it supports a FDD.
In position B, it supports a HDD.
Connector Pin Assignments
PIN NO. SIGNAL NAME DIRECTION
Parallel Port Connector
13
000000000000cJ
25
oooooooooooc
EQLT - 2
ROUT
GOUT
BOUT
IOUT
NC
HSYNC
VSYNC
12/12/88
DESCRIPTION
Frame Ground
Ground
Video Signal (Red)
Video Signal (Green)
Video Signal (Blue)
Video Signal (Intensity)
No connection
Horizontal Sync.
Vertical Sync.
Equity Series Computers
EQUITY LT
I/O Port Addresses
Function
Address
000-OlF
020 - 03F
DMA Controller
040 -05F
Timer / Counter
Programmable Peripheral Interface
080 - 07F
Interrupt Controller
DMA Page Register
080 - 09F
Non - Maskable Interrupt Mask
OAO
2F8-2FF Serial Port 2
Hard Disk Controller
320 - 32F
3BC - 3BF
Parallel Port
3D0 - 3DF
Video (LCD/CRT) Controller
Floppy Disk Controller
3FO-3W
3F8 -3FF Serial Port 1
Gradation Selection
03DA
RTC and CMOS RAM
1184-1185
System Status Register
1188
DMA Channels
Function
Channel
0
DRAM Refresh
1
2
Spare
FDD Controller
3
HDD Controller
Hardware Interrupts
NUMBER
FUNCTION
IRQO
IRQl
Timer Output
IRQ2
IRQ3
Reserved
Serial Port 2
IRQ4
Serial Port 1
IRQ5
Hard Disk
IRQ8
IRQ7
Floppy Disk
Keyboard
Printer
Equity Series Computers
12/12/88
EQLT-3
EQUITY LT
lnstallation/Support Tips
Software Problems
Power
- - -
The Equity LT AC adapter is an auto -sensing unit
- - -
which adjusts automatically between 100-240 V,
on the Equity LT, set the the CPU speed to 4.77
MHz. This has been found to have fewer conflicts
50/60 Hz. Therefore, it can be used anywhere in
the world without special adjustment.
- - -
When installing a copy- protected software package
with copy-protection. After the installation, the
CPU can be switched back to the higher speed.
When using the Equity LT, equipped with the HDD
and backlit LCD, on battery power, take
conservation measures. These are: 1) set the
backlight period option to 30 seconds, 2) set the
brightness and contrast controls as low as is
- - -
If a software package does not appear to be
compatible with the Equity LT, try switching the
CPU speed to 4.77 MHz before giving up. Some
software packages (e.g., PC-Talk Ill from Headlands
comfortable, 3) run at 4.77 MHz and 4) turn the
Communications Corp.) have been found to function
HDD off, at the power switch in the rear of the
only at 4.77 MHz.
drive, when the HDD is not actually in use.
- - -
Periodically, discharge the battery completely. This
will help to minimize the memory effect encountered
with NiCad batteries. After the complete discharge,
give the LT a full, 12-hour recharge. This will
help to keep battery charge life as great as
possible.
Video
- - -
When using the Equity LT with a color monitor, as
opposed to an LCD, make sure that LCD DIP switch
number 4 is set OFF. If the unit is connected to
both LCD and monitor, the display can be switched
back and forth without rebooting.
- - -
If you find the display, generated by your software
package, is difficult to read, adjust LCD DIP
switches 2 and 3 to find the clearest LCD Mode.
There are four options and one of them should
improve the display.
- - -
If your software requires that you specify a display
type, select CGA. If it is an option, select CGA ONE COLOR. Some software packages have a
display type called BLACK & WHITE for Laptops. If
this is an available option, select it.
EQLT - 4
12/12/88
Equity Series Computers
EQUITY LT
Information Reference List
Engineering Change Notices
EQLT-001
12/8/87
Hilo-HDC Snort Potential
EQLT-002
EQLT-003
Change of Cable Set Y6DE (PDD Signal Cable)
2/10/89
Equity LT/LT Modem Insulating Sheet
Product Support Bulletins
50031
12/14/87
Equity Series with Word and Serfal Printers
w5/~
Equity LT - Common Questions and Answers
6/14/M
Equity LT Battery Life
W89
Equity Series Computers - ROM History
Related Documentation
A495AAA
Equity LT S&ware Package. MSDOS 3.2 and GW-Basic
A806021
Equity LT Software Package
MSDOS 3.3 Upgrade
M-TMEQLT
Equity LT Technical Manual
M-PMEQLT
Equity LT Programmer’s Reference Manual
MPL-EQLT
4l2li=
Equity LT Pans List
MPL-EQLTBL
MPL-EQLTS
1l/10/87
11/10/87
Equity LT LCD (Back Lit) Parts List
Equity LT LCD (Supertwist) Parts List
Equity LT User’s Guide and Diagnostics Manual
Y16499100300
Technical Information Bulletins
EQLT-OfIl
l/31 189
Equity LT/LT Modem
EQSEMO4
6/12/i%
Keyboard Alignment
Equity Series Computers
9/22/89
EQLT-5