Epson Equity III+ Product Information Guide
Computer Specifications
80286
CPU
MATH
CO.PfKlcESSOA
RAM
ROM
FLOPPY OISK
CONTROLLER
HARO OlBK
CONTROLLER
l/O EXPANSIOW
SLOTS
SPEllKEn
CLOCK/CALENDAR
RAM
KEYBOARD
KEYLOCK
BWITCH
POWER SUPPLY
MASS STORAGE
Standard
Optional
INTERFACES
Standard
Standard
ENVIRONMENTAL
REQUIREMENTS
Temperature
Operatmg
range
Storage range
Humrdrty
Operatmg
range
Storage range
PHYSICAL CHARACTERISTICS
Width
Depth
Herght
Werght
mlcroprocessor. 6MHz.
8MHr.
12MHz
speeds; real address (8086 com-
paltble) and protected
address (multr-taskmg or mUltl-
user) modes
24.brl
80287-8 support
Co-processor clock speed selectable (up 10 8MHz)
640KB RAM on
(155MB RAM max. with memory
expansron cards)
64KB. Selectable EPROM pairs
Supportstwodrrvesmaxrmom with
multrple lormats;
densdy (360KB). 5%” lugh-density
(l.ZMB). and
troller
Supportstwo
wrth
I/O exoanslon slot
Nme
and two wrth 8-bd bus. seven
avaIlable I”
Internal wrth volume control
64 Bytes of CMOS RAM for real-
lime
conhguratlon with battery backup
tlon. 12 function keys. enhanced
selectable clock
virtual
address 8 16.brt data bus
(option)
mar”
system board
5%”
double-
3h” (7201(8).
mstalls I” l/O expans,on
droves maxrmum
mullrple formats.
total: seven wrth
base
clock, calendar. and system
Detachable, 3
keys, 58 key QWERTY
AT style
Security keylock for cover and
keyboard
Swrtching type, fan cooled, world-
wide
115123OVAC. 192W. +SVdc.
+lEVdc, -5Vdc. -12Vdc
Five
half
height deuces maximum
5 25” half
height
12MB storage capacity
5 25” half
herght
1.2MB
storage capacltV
5.25” hall
herght
360KB storage capacdy
5.25” lull helghl hard
40MB storage capacity
Centron& compabble port
Rs-232C serlal Interface port
41”
to1040 F
19.6
17.4
6.6
m.
I”.
m.
Ibs.
(5” 10 40”
22” 10 158” F (-5”
10% 10 80% non-condensing
10% 10 90% non-condensing
CPU
31.9
mstalls I”
16.bll
conflguratlon
posrtron. 101
COflflgUra-
lloppy
floppy
floppy
drsk drive.
lo70”
con-
scufpled
drove;
drive;
drove.
C)
C)
Keyboard
bus
19.3
7.7
1.8
39
slot
I”.
I”
I”.
Ibs.
EQUITY III + (12 MHz)
E” nry”lnrnrnl”
,I.. xc.
(+15%. -20%); 60Hz,4A
230VAC. ( f 15%).
0PnoNs
Display Adapters
Monitors
Mass Storage
VOLUME control knob
Switch Settings
r
I-
There are no DIP switches on the Equity Ill +. However,
there is a MONITOR SELECT switch, a CPU SPEED switch
and a VOLUME CONTROL on the front of the unit in the
lower left hand corner.
Monitor Select
Color, composite, EGA, and VGA monitors
The CPU SPEED switch selects between 6 MHz, 8 MHz, and
12 MHz. When the computer is running at 6 MHz the power
light is red, at 8 MHz, the light is orange, and at 12 MHz,
the light is green.
60HZ.
Z.>A
Monochrome Display Adapter
Color Graphrcs Adapter
Multi-Mode Graphics Adapter
Enhanced
Monochrome Display
(720 x 350 dots)
Color Display (640 x 200 dots)
Enhanced Color Drsplay
f64l’l x
350 or 640 x 200 dots
&tomatrcally
360KB
5U”
1.2MB 5U”floppy Drove
40MB Hard
CPU SPEED
swrtch
I
Graphrcs
selectable)
Floppy
Orsk
Drive
Adapter
Drove
Equity Series Computers
12/l 2/88
EQlll
+ - 1
EQUITY Ill+ (12 MHz)
Connector Pin Assignments
Parallel Port Connector
13
00000000000
25
00000000000
PIN NO.
1
2 DATA0
3 DATA1
4 DATA2
5 DATA3
6
7 DATA5
0
9 DATA7
10
11
12
13
14
15
16
17
16 GND
19
20
21
22
23 GND
24
25
SIGNAL
-
STROBE
DATA4
DATA6
-
ACK
+ BUSY
+PE
+ SLCT
- AIJTOFT
-
ERROR
- INIT
- SLCTIN
GND
GND
GND
GND
GND
GND
NAME
Serial Port Connector
12345
(od)
[o
PIN NO.
9
o o
6 7 8 9
SIGNAL NAME
CRDET
RXDT
TXDT
DTR
SG
DSR
RTS
CTS
RI
oJ
DIRECTION
0
0
0
0
0
0
0
0
0
I
I
I
I
I
I
I
I
DIRECTION
I
DESCRlPTKlN
Printer Data Bit 0
Printer Data Bit 1
Printer Data Bit 2
Printer Data Bit 3
Printer Data Bit 4
Printer Data Bit 5
Printer Data Bit 6
Printer Data Bit 7
Acknowledge
Printer Busy
End of Paper
Printer Select
Auto Feed
Printer Error
Printer
Inltiallze
Prlnter Select
In
Ground
Ground
Ground
Ground
Grwnd
Ground
Ground
Ground
DESCRIPTION
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
Main Circuit Board
Jumper
123456
A
B
A A
B A
A B
B
B
A
B
A A *
B A
A B
B B
L
* Factory Settings
Notes:
Selectable wait states only available at 12 MHz.
1.
Wait cycles for external 16-bit devices. These
2.
selectable wait cycles are available at 12 MHz only.
Prohibited
*
Set CPU clock
(6/8/12
Prohibited
Use CPU clock for NPX clock
* Use 8 MHz clock for NPX clock
Prohibited
* 2 wait cycles for EPROM (note 1)
1 wait cycle for EPROM (note 1)
4 wait cycles (note 2)
3 wait cycles (note 2)
2 wait cycles (note 2)
1 wait cycle (note 2)
Function
MHz)
Keyboard Connector
I
Pin Number
EQlll
+ - 2
Signal Name
1
Clock
2 Data
3
4
5
-
Not Connected
Ground
+5
Ground
VDC
I
I
12/l 2188
Equity Series Computers
EQUITY Ill + (12 MHz)
Memory Board
Jumper
1234567
A A A
B A A
B B A
B B B
A A
B B
A A
B B
* Factory Settings
Function
* RAM 640KB
RAM 512KB
RAM 256KB
RAM OKB
EPROM 21728 type
* EPROM 27256 type
* Select ROM sockets
24A and 248
Select ROM sockets
23A and 236
I/O Port Addresses
Address
OOO-OlF
020 -
040 - 05F
060 - 06F
070 - 07F
080-09F
OAO
-0BF
OCO
OE0
-OFF Numeric Coprocessor
1FO -
278 - 27F
2F8
-2FF Serial Port 1
378 - 37F
3BC -3BF Parallel Port 2 (on some video boards)
3Fo - 3F7
3F8-3FF
DMA Controller 1
Interrupt Controller 1
03F
Timer/Counter
Keyboard controller and Port B
CMOS RAM and Non - Maskable Interrupt Mask
DMA Page Register
Interrupt Controller 2
-0DF
DMA Controller 2
IF7 Hard Disk Controller - Primary
Parallel Port 1
Parallel Port 0
Floppy Disk Controller
Serial Port 0
Function
Multifunction Board
lumper Function
I 2 3 4 5 6 7 8 9 10
4
A
3 A
4
B
3 B
A A
A B
B A
B B
A A
A B
B
l Factory Settings
A
B
-
A
B
A
B
* Primary register set (AT FDC)
Secondary register set (AT FDC)
PC register set (FDC)
Disable FDC register set
* Primary parallel I/F,
A
B
A
Secondary parallel I/F,
Video adapter parallel I/F,
Disable parallel I/F
* Primary serial I/F,
Secondary serial I/F,
Disable serial I/F
* AT compatible FDD I/F
Equity III FDD I/F
* Standard setting
Test mode of VCO
IRQ7
IRQ4
IRQ5
IRQ3
IRQ7
Keylock
The keylock on the front panel allows you to disable the
keyboard and RESET button and lock the top cover of the
main unit for security. The keyboard may be locked while
the system is in operation. This disables the keyboard SO no
one can interfere with the current operation.
To lock the system, insert the key with the notch pointing
left and turn it clockwise. You must press it in slightly when
you turn the key. To unlock it, insert the key with the notch
pointing up and turn the key counterclockwise. You can
remove the key in either position.
Equity Series Computers
12/12/88
EQIII + - 3
EQUITY III + (12 MHz)
DMA Channels
--
Channel
I
0 Spare
1
2
3
4
Spare
floppy disk transfers
Spare (Hard disk drive)
Cascade
5 Spare
6
7 Spare
Spare
Hardware Interrupts
CTLRl CTLFI2
IRQO
IRQl
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQi’
IRQ8
IRQ9
IRQlO
IRQll
IRQ12
IRQ13
IRQ14
IRQ15
Timer Output 0
Keyboard
Reserved
Serial port 2
Serial port 1
Parallel port 2
Floppy disk interrupt
Parallel port 1
RTC interrupt
Reserved
Reserved
Reserved
Coprocessor
of data from channel
FUNCTION
Reserved
Hard disk controller
Reserved
Function
0
-3
EQlll+ -4 12/12/88
Equity Series Computers
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