Epson Equity I+ Product Guide
Computer Specifications
CPU
MATH
CO.PROCESSOR
RAM
ROM
FLOPPY DISK
CONTROLLER
110
EXPANSION
SLOTS
SPEAKER
CLOCK/CALENDAR
RAM
KEYBOARD
POWER SUPPLY
MASS STORAGE
Standard
Optronal
Optional
Optional
INTERFACES
Standard
Standard
PHYSICAL CHARACTERISTICS
Wrdth
.
Depth
Hefght
Werght
POWER
REGUIREMENTS
OPTIONS
Display Adapters Monochrome Display Adapter
Monrtors Monochrome Display
608610 mfcroprocessor 4 77MHz
or
1OMHz swatch
speeds
8087 support (optron). 477MHz
or
1OMHz
64OKB.
16K6
Supports four
5 25” double-densfty (360KB)
3 5”
(72OKEt)
Frve
full length PC/XT conipatrble
slots
Internal. programmable
Real-trme
battery backup
Detachable. 3
AT-style
Worldwrde
Two half
5 25” half
360K storage capacity
5 25’ half height floppy
360K storage capacity
3 5” half height floppy
720K storage capacity
3 5” half height hard
20MB storage capacity
Centronrcs
port
RS232C compatrble
selectable clock
parrty
brt
optronal
one socket
droves
clock/calendar
posrtron.
115/23OV
herghl devrces
hetght
floppy
compatible parallel
CPU
144rn
148rn
5 7rn
19
8lbs
115V
AC. 60Hz 17A
230V AC.
50Hz.
0 9A
Color Graphics Adapter
MGA (Multr Mode Graphics
Adapter)
EGA (Enhanced Graphics
Adapter)
(720 x 350 dots)
Color Display (640 x 200 dots)
Enhanced Color Display
(640 x 200 or 640 x 350 dots
automatrcally selectable)
maximum.
wrth
enhanced
AC 80 watts
maxrmum
drsk drove.
drsk drove
desk drove.
drsk
drive
serral
port
Keyboard
193Irl
7 7rn
18rn
3 9
Ibs
I
1
Switch Settings
I
1
The CPU SPEED switch selects between 4.77 MHz and 10
MHz. When the computer is running at 4.77 MHz, the power
light is orange, and at 10 MHz, the light is green.
System Configuration Switches
Switch 1
4
1
2 3
3f*
5
7 8
6
In
off
On*
off*
On Off
oif’
Off On
On On
off* off*
On Off
Off On
On On
off off
On Off
Off On
On On
I/O Configuration
Switch 2
1 2 3 4
off* off*
Off On
On Gff
On On
off* off*
On Off
On
Function
Parallel port secondary
Parallel port primary
Parallel port tertiary
Parallel port disabled
Serial port primary
Serial port secondary
Serial port disabled
EQUITY I+
Function
Enhanced Keyboard
Unenhanced Keyboard
NPX Installed
NPX Not installed
RAM size = 640K
RAM size = 576K
RAM size = 512K
RAM size = 256K
Display = Monochrome
Display = Dolor 80
Display = Color 40
Display = Reserved
Number of
Number of
Number of
Number of
FDDs
FDDs
FDDs
FDDs
= 4
= 3
= 2
=
1
Equity Series Computers
* Factory Settings
12/12/88
EQI+ - 1
EQUITY I+
Connector Pin Assignments
Parallel Port Connector
PIN NO. SIGNAL NAME
1
2
3
4
5
6
7
a
9
ia
11
12
13
14
15
16 -1NI'T
17
18
-STROBE 0
DATA 0 0
DATA 1 0
DATA 2 0
DATA 3 0
DATA 4 0
DATA 5 0
DATA 6 0
DATA 7 0
-ACK
BUSY
PE
SLCT
-AUTO
FD 0
-ERROR
0
^
25 GND
-SELECTIK
0
DIRECTION
I
I
I
I
Serial Port Connector
PIN NO.
1
2
3
4
5
6
7
8
9-19
20
21
22
23-25 NC
Note. The CURRENT LOOP functions are not supported. Standard
Pin 9 :
Pin
Pin
SIGNAL NAME DIRECTION
NC
TRAKSMITTED
RECEIVED DATA
REQUEST TO SEND
CLEAR TO SEND
DATA SET READY
SIGNAL
CARRIER DETECT
NC
DATA
NC
RING INDICATOR
DATA 0
CROWD
TRAKSMIT
READY
I
0
I
I
I
0
I
Interfacehas its function described
TRANSllIT
11:
TRWSMIT
ia:
RECEIVE CURRENT LOOP DATA
CURRENT LOOP RETURN
CURRENT LOOP DATA
DESCRIPTION
Strobe
Data
Bit 0
Data
Bit 1
Data Bit 2
Data Bit 3
Data Bit 4
Data Bit 5
Data Bit 6
Data Bit 7
-Acknowledge
BUSY
Paper Empty
Printer Selected
-Auto
Paper
Feed
-Error
-Initialize
-Select In
Ground
DESCRIPTION
No
connection
Transmitted
Data
Received Data
Request to send
clear
to send
Data Set Ready
Signal Ground
Carrier Detect
No
cnnnection
Data Transmit Ready
No connection
Ring Indicator
No connection
beloi;,
PIN NO.
RSm232C
1
2
3
4
5
-a
6
Keyboard Connector
SIGNAL NAME
KBD CLK
KBD DATA
-KBD RESET
GND
+5v
NC
DIRECTION
I/O
I/O
0
Keyboard Clock
Keyboard Data
-Keyboard Reset
Ground
Power
tie
connection
I/O Port Addresses
Address
000-OlF
020 - 03F
040 - 05F
060 - 07F
080 - 09F
OAX
200 - 20F
DMA Controller
Interrupt Controller
Timer
Programmable Peripheral Interface
DMA Page Register
NMI Mask Register
Game Control
210-217 Expansion Unit
21F
278 - 27F
260 2El
2E2
-2E3 Data Acquisition (Adapter 0)
2F8
-2FF Serial Port 2
300-31F
320 - 32F
348 - 357
360 - 367
368 - 36F
378 - 37F
380 -38F
390 - 393
3A0 - 3AF
380
-3BF Monochrome Display and Printer Adapter
Reserved
Parallel Printer Port 2
2DF
Alternate Enhanced Graphics Adapter
GPIB
(Adapter 0)
Prototype Card
Hard Disk
DCA 3278
PC Network (low address)
PC Network (high address)
Parallel Printer Port 1
SDLC,
Bisynchronous (BSC) 2
Cluster
Bisynchronous (BSC) 1
3C0 -3CF Enhanced Graphics Adapter
3DO-3DF Color Graphics Monitor Adapter
3F0 - 3F7
3F8-3FF
1184
1185
Floppy Disk Controller
Serial Port 1
RTC Address Register (write only)
RTC Data Register
Function
DESCRIPTION
EQI+ -2
12/12/88
Equity Series Computers
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