Epson Equity III Dimensions

EPSON
Product Support Bulletin
Subject: Proper Method for Running Benchmark and Diagnostics Programs
Date: 06/04/93 PSB No: S-0158
Page(s): 1 of 1 Originator: MWT
This bulletin describes the proper method for running any benchmark or diagnostics
programs. This applies to any computer system.
In most cases, the computer should be started using an MS-DOS boot diskette
that’s ‘clean’ -
in other words, one with no CONFIG.SYS or AUTOEXEC.BAT files.
The appropriate executable can then be run, either from diskette or hard drive.
There will be some exceptions to the above rule. In attempting to benchmark or
troubleshoot any add-on that requires a device driver (CD-ROM, local area network,
etc.), obviously the necessary device driver(s) must be loaded. Also, some
programs will require a minimum number of FILES or BUFFERS to be defined in
the CONFIG.SYS file. Such programs will usually display this requirement if they
are run without the necessary CONFIG.SYS file.
For the most consistent results, use the absolute minimal boot configuration that’s
allowed by the hardware being tested.

EPSON
EPSON AMERICA, INC.
INFORMATION
Product Support Bulletin
Subject: Maximum Number of Printers Supported by Current Equity Computers
Date: 02/06/91
PSB No: S-0128
Page(s): 1 of 1 Originator: KAS
As computing environments increase in complexity, there has been an increasing
number of instances that require the support of several printers by one computer.
One common example is that of using Novell Netware’s print server capabilities to
provide printer access to a large group of users with differing printer requirements.
Netware is capable of supporting three (3) parallel and two (2) serial printers on one
server. Recent testing has shown that the Equity 386/25 Plus, Equity 386/25, Equity
386/20 and the Equity 386SX Plus will support three (3) parallel ports along with two
(2) serial ports. The key factor in providing support for a third parallel port is the
need for a parallel interface card that can be set to the IBM Monochrome
Graphics/Parallel printer I/O address at 3BCh. The computer looks for this address
first and, if present, will assign the parallel port on that card as LPT1. The built-in
parallel port (I/O address 378h) will then be addressed as LPT2. We also had an
AST I/O Mini serial/parallel card addressed at l/O address 278h, which was then
reassigned to LPT3. Each of the three parallel ports was attached to a printer. There
was also a printer attached to each of the two serial ports. All five printers were then
set to print simultaneously under Netware Version 2.15 Rev. C using PCONSOLE. All
five printers were able to print the documents assigned to them, simultaneously. The
units were then tested using WordPerfect 5.1 on the network and again were
successful in printing to the five (5) printers at the same time. The last tests were run
with the units booting under DOS 4.01 and screen prints being directed to each of
the printers. WordPerfect 5.1 was also used to direct documents to each of the
printers. Again all five (5) printers were able to print the files that were sent to them.
Although not all Equity computer models were tested in this situation, the Equity
models 386SX, lIe, Ill+ and II+ should work in a similar manner if the instructions
above are used as a guide. There is one item of which to be aware when using the
this setup and that is the system will complete the RAM count and lock up if using a
monochrome monitor. If you need to use three parallel ports, USE A COLOR
MONITOR.

Product Support Bulletin
Subject: Change to Memory Expansion Board Recommendations for Equity
II+ and Equity Ill+
Date:
3/06/90
PSB No:
S-0113
Page:
1 of 1
Originator:
wsw
This bulletin provides information concerning expanded memory boards which
are recommended for use in the 12MHz models of the Equity II + and IlI+.
Please consider this information as an update to Product Support Bulletins
S-0042A and S-0051.
Due to the fact that the I/O bus speed of both the Equity II + and the Equity
Ill + is the same as the CPU speed selected, there are some problems in
compatibility with expanded memory boards when operating the systems at
12MHz.
Previously, Epson recommended the use of Micron Technology memory
expansion boards.
These boards have been removed from our recommended
product list due to the fact that Micron no longer produces ISA memory
boards.
One new addition to the recommended product list is the RAMpage 286 PIus
board from AST. This board was released in February 1990 and is compatible
with I/O bus speeds of 12MHz.

Product Support Bulletin
Subject:
Equity II+, Ill + and 386/20 Compatibility with New Western Digital
Hard Disk Controllers
Date: 9/8/89
PSB No:
S-0101
Page: 1 of 1
Originator:
PNM e r1.m.
Western Digital has introduced a new series of 16 - bit hard disk controllers
that replaces the models previously certified for use in our Equity Series
computers. This bulletin reports on the compatibility of the new model
controllers in our 80286 - and 80386 - based computers.
Current Model New Model
WD1003A- WAH WD1003V- MM1
Used in the Equity II + and III +, and currently available from Epson
America, the WD1003A - WAH has been replaced in Western Digital’s product
line by the WD1003V- MM1, The new controller is capable of providing a
2:1 interleave format. This controller card has been tested in the Equity II +
and Ill+ with the Epson 20Mb and 40Mb hard drives as well as the
Seagate ST - 251. Tests were performed using a 2:1 interleave factor and all
tests were completed successfully.
Current Model New Model
WD1006A - WAH WD1006V- MM1
The WD1006A - WAH hard disk drive controller card, used in the Equity
386/20 and ‘currently available from Epson America, has been replaced in
Western Digital’s product line by the WD1006V- MM1. The new controller is
capable of providing a 1:1 interleave format. The controller card has been
tested in the Equity II+, Ill+ and 386/20 with the Epson 20Mb and 40Mb
hard drives as well as the Seagate ST-251. All tests were performed using
a 1:1 interleave factor in the test units and were completed successfully.

Product Support Bulletin
Subject:
Epson Equity III + and Seagate ST- 238R Compatibility Tests.
Date: 9/7/89
PSB No:
S-0100
Page: 1 of 1
Originator:
PNM fV\V
The purpose of this test is to provide information on the compatibility of the
Seagate ST- 238R 30Mb hard drive with the Epson Equity Ill + Computer.
The test was conducted at 6Mhz using an Equity Ill + configured as follows:
(1) 1.2Mb Floppy Disk Drive
SPFG Multifunction Card
Epson EGA Video Card
WD1002A - 27X Controller Card (8 - bit, RLL type)
Seagate ST- 238R 30Mb Hard Disk (RLL type)
Low - level formatting was initiated from MS - DOS using the Debug
command G =C800:5 after drive type “NONE” was selected in SETUP. The
format was completed in less than 5 minutes with occasional short stops at
listed bad tracks. FDISK was performed without a problem and the disk was
then partitioned into one 30Mb bootable MS - DOS partition. A high level
format was performed on the disk using Seiko- Epson MS - DOS 3.36 and
the system was transferred.
The unit was then tested for it’s ability to start up from the hard drive from
a cold boot, a warm boot and when the reset switch was pushed. All tests
performed as they should. Files were loaded and removed from the disk
and various applications were run without any problems.
After the completion of the first set of tests the Equity Ill + was set to run
at 12Mhz, the drive was reformatted and all tests were performed a second
time. The only problem encountered in the testing procedure was the
inability to run system diagnostics on the drive and controller. The system
would return the message “Hard drive not installed” and return to the main
menu. When the unit was tested with IBM’s Advanced Diagnostics Version
2.01, the unit would return an “Invalid drive type” message. The HDSIT utility
also failed to work correctly and locked the system up at the intro screen.
Both tests were performed at 8 and 12Mhz. This problem is attributed to a
limitation in the diagnostic programs inability to recognize a hard disk drive
in an AT- type machine when a drive type parameter of NONE is used.

Subject: Using High Capacity ESDI and SCSI Hard Disk Drives with the Current
Equity Series Computers
Date: 10/10/90 PSB No: S-0091A
Page(s): 1 of 2 Originator: PNM
The purpose of this bulletin is to provide some specific examples of how to install
high capacity ESDI and SCSI hard disk drives in the current Equity Series computers.
The largest drive directly supported by the ROM BIOS (ver 220) in the Equity II+ and
Equity Ill+ has a capacity of 130Mb, while the largest supported directly by the ROM
BIOS in the Equity lIe, 386SX, 386/20 and 386/25 is 153Mb. To allow our units to be
used in stand alone and especially network environments that require higher drive
capacities, the use of the Adaptec ACB 2320 controller (available with the Equity
386/20) with the optional ACB-BIOS (available from Adaptec) will provide support for
a variety of ESDI drives up to 314Mb. The AC&BIOS also has the ability to read the
ESDI drive parameters from the drive itself. This will allow it to configure virtually any
ESDI drive.
NOTE: The Adaptec BIOS ROM should be installed in location U25. In
order for it to work, the jumper J13 pin 1 must be installed. Caution
should be used when ordering the BIOS ROM as problems have
been experienced when using version B. Versions A and C
perform normally.
The WD1007V-SE1 controller is another option that can be used with high capacity
ESDI drives that are not supported by the ROM BIOS drive tables. When using this
controller’ make sure that all pins on jumper on W1 are open. You can run SETUP
and use Type 1 for the drive type or let the controller automatically set it at the end of
the low level format routine provided by the controller’s BIOS. To start the WD-BIOS
Format Utility, run DEBUG and enter G=CC00:5. This will bring up a menu listing the
operations that are available. Run the low level format and either enter the defective
blocks listed on the drive by hand or let the program enter them automatically.
Continue with the “Verify” and “Surface Analysis” utilities and finally finish with the “Set
Drive Type and Exit". At this point there are 5 options from which to choose using the
“+” and ‘I-” keys to toggle through the available choices. Select the ‘Translation
Option-63 SPT (Sectors Per Track)” if the hard drive has more than 1024 cylinders or
“Non-Translation” for drives with less than 1024 cylinders.

PSB No: S-0091A
Page: 2 of 2
The next step after completing the low level format is to run the Novell COMPSURF
utility. When setting up the COMPSURF Parameters it will ask if you want to “Format
the drive?” where you will choose the “NO” response and proceed to the next option.
When asked if you want to “Retain the Bad Track Table” answer ‘YES” and continue
on with the rest of the COMPSURF options. After completion of the COMPSURF
utility, continue on with the rest of the NETGEN installation.
The use of high capacity SCSI drives is another area where we are able to provide a
solution for those customers who require storage capacities greater than the Epson
Supplied options. When using a SCSI type hard disk drive, the hard disk controller
usually is a part of the hard drive unit. The connection between the SCSI bus and the
Equity’s data bus is made by installing a host adaptor into the Equity computer and
connecting the SCSI drive to the host adaptor. The Seagate ST-296N, 85Mb drive,
used in a stand alone configuration in the current Equity Series computers has
provided favorable results.
When using SCSI drives in a Novell network, the use of the Future Domain SCSI
adaptor with high capacity SCSI drives such as CDC and Maxtor has also been very
successful. Future Domain recommends using Version 1.4 of their device driver
when installing Novell Netware Versions 2.1-2.15. When used with the TMC-830 (use
ROM Vers. 4.0L) or the TMC-840 (use ROM Vers. 5.0C) host adapters, drive sizes of
up to 800Mb (CDC 94181-702) can be accommodated.

Product Support Bulletin
Subject:
Western Digital XT - GEN Hard Disk Controller Anomalies
Date:
8/10/89
Page:
1 of 1
PSB No: S-0089
Originator:
Mm*
Recent reports from the field have revealed certain anomalous behavior when
the Western Digital XT- GEN hard disk controller is used in the Equity II +,
Ill + or 386/20 computers.
The XT - GEN controller is an 8 - bit, XT- type “generic” controller. As such,
there would be an immediate loss of performance if it were installed in a 16 -
bit, AT- type ISA bus system. However, the poor performance is not the only
issue. The XT- GEN can produce addressing conflicts that do not directly point
to the controller as the cause. For example:
An Equity II + was equipped with a Seagate ST- 225 hard drive and the XT-
GEN controller. It was also configured with the IBM 5250 terminal emulation
card and software and was connected to an IBM System/36 host. Additionally,
IBM’s PC Support/36 software was correctly installed on both the II+ and
System/36. This utility enables file and folder sharing as well as up- and
download capability. The 5250 terminal emulation works perfectly; the PC
Support/36 utility does not. This pointed to an “obvious” incompatibility.
As part of the troubleshooting procedure, a Western Digital WD1003V- MM1
16 - bit controller was substituted for the XT- GEN. With this one change, the
PC Support/36 functions started operating correctly. Other similar examples
have been reported.
Our recommendation is that 8- bit controllers in general should not be used
because of performance losses. The XT- GEN controller should not be used at
all.

Product Support Bulletin
Subject:
Equity and Apex Series Compatibility with the Sysgen OmniBridge
Controller and BridgeFiler External Floppy Drives
Date: 04/11/90
Page:
1 of 3
PSB No:
S-0088B
Originator: KAS 60
The purpose of this bulletin is to provide the results of compatibility testing
conducted by the Computer Product Support Center with the Sysgen
OmniBridge controller and Bridge - Filer external floppy disk drives.
Comments
Equity I The Equity I was found compatible with the OmniBridge
controller. It was able to support one or two external
disk drives (daisychained) together. The external drives
could be used as high density (1.2M and 1.44M) or
normal (360K and 720K) disk drives.
Equity II
Equity III
Equity I +
Equity le
The Equity II was found to be totally incompatible with
the OmniBridge controller.
The Equity III was found compatible with the OmniBridge
controller. It was able to support one or two external
disk drives (daisychained) together. The external drives
could be used as high density (1.2M and 1.44M) or
normal (360K and 720K) disk drives.
The Equity I + was found compatible with the
OmniBridge controller. It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
1.44M) or normal (360K and 720K) disk drives.
The Equity le was found compatible with the OmniBridge
controller. It was able to support only one external
floppy drive, unlike the other models tested. The drive
could be used as a high density (1.2Mb and 1.44Mb) or
normal (360K and 720K) disk drive.

PSB No: S-0088B
Page: 2 of 3
Equity II +
Equity lIe
The Equity II + was found compatible with the
OmniBridge controller.
It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
1.44M) or normal (360K and 720K) disk drives.
The Equity Ile was found compatible with the
OmniBridge controller. It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
1.44M) or normal (360K and 720K) disk drives.
Equity Ill +
The Equity III + was found compatible with the
OmniBridge controller. It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
144M) or normal (360K and 720K) disk drives.
Equity 386SX The Equity 386SX was found compatible with the
OmniBridge controller.
It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
144M) or normal (360K and 720K) disk drives.
Equity 386/20
The Equity 386/20 was found compatible with the
OmniBridge controller.
It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
1.44M) or normal (360K and 720K) disk drives.
APEX
APEX +
The Epson APEX was found compatible with the
OmniBridge controller.
It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
1.44M) or normal (360K and 720K) disk drives.
The Epson APEX was found compatible with the
OmniBridge controller. It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
1.44M) or normal (360K and 720K) disk drives.

PSB No: S-008B
Page: 3 of 3
APEX 100
APEX 200
The Epson APEX 100 was found compatible with the
OmniBridge controller.
It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
1.44M) or normal (360K and 720K) disk drives.
The Epson APEX 200 was found compatible with the
OmniBridge controller.
It was able to support one or
two external disk drives (daisychained) together. The
external drives could be used as high density (1.2M and
1.44M) or normal (360K and 720K) disk drives.
NOTE:
The recommended switch settings for the OmniBridge controller are
as follows:
1-1 DOWN 2-1 DOWN
1-2 DOWN 2-2 DOWN
1-3 DOWN 2-3 UP
1-4 DOWN 2-4 UP
These settings select NO ADDRESS for the OmniBridge BIOS and
allow it to coexist with the internal FDC of the computer in which it
is being installed. This way you do not need to disable the internal
FDC or connect any cables from the OmniBridge to internal floppy
drives. This was found to be a universal setting for all of the
computers listed above as compatible with the OmniBridge controller.

Product Support Bulletin
Subject: Tape Backup System Test Results
Date: 6/13/89
Page: 1 of 2PSB No: S-0087
Originator: MWT w
The Epson America Product Support Center has recently tested four tape
backup systems:
Archive VP - 150i Internal, 150MB
Mountain Series 4000 FileSafe External, 40MB
Tallgrass TG - 4060 +
External, 60MB
Tecmar
QT - 60e
External, 60MB
The tape drives were tested on a variety of systems (please see the notes
below). In all cases, the drive manufacturer’s documentation was used as a
guide to installation and operation. Note that for 8086/88 computers, the
XT- type settings were used. For the 80286/386 computers, the AT- type
settings were used. This is important for correctly configuring the host
adapters or controller cards for IRQ, DMA and I/O port address.
Archive VP - 150i
The VP - 150i was tested on the Equity II +, Ill + and 386/20. Due
to the capacity and nature of the drive, it is not particularly suited
for use in any of the 8086/88 computers. This was the only drive
supplied with Unix/Xenix device drivers. It was tested under MS -
DOS 3.3 and SC0 Xenix 286 System V version 2.2.1 with no
problems encountered. The VP - 150i is also Novell tested and
certified under the NetWare operating system.
Mountain Series 4000 FileSafe
The Series 4000 FileSafe was tested on the Equity II+, III + and
386/20. Due to the use of a 16 - bit controller, it was not tested
in any of the 8086/88 computers. It was tested under MS - DOS
3.3 with no problems encountered. A chapter is included in the
tape software documentation on backup and restore operations on
a local area network, including Novell.

PSB No: S-0087
Page: 2 of 2
Tallgrass TG - 4060 +
The TG- 4060+ was tested on the Apex, Apex +, Equity I +,
II +, Ill + and 386/20. It was tested under MS- DOS 3.2 and 3.3
with no problems encountered. There is no documentation on LAN
operations.
Tecmar QT - 60e
The QT- 60e was tested on the Equity I +, II +, III + and 386/20.
Testing was conducted under MS - DOS 3.3 with no problems
encountered. The Tecmar documentation includes extensive
information on installation and operation in a LAN environment.
General Notes
Of the four units tested, the Archive and Tecmar drives offered the
easiest installation. They also provided the best performance, with
the Tallgrass drive giving the slowest disk-to-tape and tape -
to- disk operations. All four drives were supplied with menu-
driven tape utility software for the MS - DOS environment.
Command-line and timed, scheduled operations are also
available. As previously mentioned, the Archive drive also included
device drivers for use in a Unix/Xenix environment, offering the
greatest level of flexibility.
Please contact the manufacturers for additional information.
Archive Corporation
Data Storage Division
1650 Sunflower Ave.
Costa Mesa, Ca. 92626
(800) 237 - 4929
Mountain Computer, Inc.
360 El Pueblo Rd.
Scotts Valley, Ca.
95066
(408) 438 - 6650
Tallgrass Technologies Corp. Tecmar, Inc.
11100 West 82nd St.
6225 Cochran Rd.
Overland Park, K S . 66214
Solon, Oh. 44139
(913) 492 - 6002 (216) 349 - 1009

Product Support Bulletin
Subject: Apex / Apex Plus / Equity Series Keyboards
Date: 4/19/89
Page: 1 of 1PSB No: S-0080
Originator: REM
AL
The purpose of this bulletin is to provide information on the various keyboards
used with the Apex, Apex Plus and Equity series computers and the part
numbers of the keyboard subassemblies used with these keyboards.
The Apex and Apex Plus computer keyboards are to be replaced as whole
units.
The Equity series keyboards are repaired to the subassembly level.
The
Equity III keyboard PCB assembly is the only one that comes with the key top
set attached.
Since some of the keyboards have the same model numbers, the difference
can be determined by the FCC ID number in those cases.
The chart below provides a quick reference to determine the part number of
the main keyboard PCB assembly, key top set, control logic subassembly, and
keyboard cable.
Apex / Apex Plus Equity I, II, Ill
Keyboard Keyboard
Key Top
Keyboard
Model Unit Model
PCB Assy set
Cable
Apex
A265091A Equity I/II Y145501001 Y145501021 Y144305000
Apex Plus 93553905410 Equity Ill
KAFLZ3AEPS1
attached KACCL060UCA
Equity I +, II +, Ill+, 386/20
Keyboard Control Key Top
Keyboard
Model
Code
FCC ID PCB Assy Board set Cable
attached Y127501022 Y127501031
attached Y127501022 Y127501031
none Y127501022 Y163502020
Y171501017 Y127501022 Y163504006
Equity le
Keyboard Control
Key Top
Keyboard
Model
Code FCC ID PCB Assy
Board set
Cable
E1160A -
C9S4D84701-201 Y163504007 Y171501017 Y171501007 Y171501006

EPSON
EPSON AMERICA, INC.
SERVICE
P RODUCT S UPPORT B ULLETIN ,a
lc
PSB NO.: S-0073 DATE: 03/17/89 ORIGINATOR: KAS PAGE: 1 of 1
SUBJECT: Micron Technology Expanded/Extended Memory Boards in the
Equity II+ and III+ (12MHz)
This bulletin provides information concerning expanded and
extended memory boards which are recommended for use in the
12 MHz models of the Equity II+ and III+.
Due to the fact that the I/O bus speed of both the Equity
II+ and the Equity III+ is the same as the CPU speed selected,
there are some problems in compatibility with expanded and
extended memory boards when operating the systems at 12MHz.
At this time, we have found one manufacturer whose boards
function reliably at all CPU speeds. They are Micron
Technology.
Micron is located at:
Micron Technology, Inc.
Systems Group
2805 East Columbia Road
Boise, ID 83706
Telephone: [phone]
Micron Technology has several models of both extended and
expanded type memory boards. Please contact them for
specifications and pricing information.
EPSON AMERICA SERVICE, 23610 TEL0 AVENUE, TORRANCE, CALIF. 90505

EPSON
EPSON AMERICA, INC.
SERVICE
PRODUCT SUPPORT BULLETIN
PSB NO.: S-0072
1 DATE:
03/17/89 1 ORIGINATOR: KAS PAGE: 1 of 2
SUBJECT: Using Seagate ST251 and ST4096 Hard Disk Drives in the
Equity II+ and III+
This bulletin provides the information required to successfully
install two of the more popular hard disk drives - the Seagate
ST-251 and ST-4096 -in the Equity II+ and III+ desktop computers.
ST-251
The ST-251 is a 5.25", half-height 40MB HDD. Unfortunately,
the drive parameters (820 cylinders with 6 heads) are somewhat
unusual and are not incorporated in the Epson ROM BIOS version
2.20, or earlier, drive type table. The closest drive type
available is Type 3 (615 cylinders, 6 heads). This would yield
30MB of available disk space. Under MS-DOS, however, there
is an alternative - use a third-party utility such as SpeedStor
or Disk Manager. This procedure would yield 40MB of available
disk space.
Here is the method used to install the drive with SpeedStor
version 5.11:
1 - With the drive type in SETUP set to NONE, physically
install the ST-251 as you would any other HDD.
2 - Boot the system with either MS-DOS 3.20 or 3.30.
3- Insert the SpeedStor diskette, type INSTALL and press
ENTER. Respond to the prompts regarding the drive type
(Seagate, ST-251) and the size of the partitions
(your choice).
4- After the partitioning is completed, SpeedStor will
prompt you to insert the DOS disk in drive A. It will
then transfer the system files to the HDD. It then
prompts you to re-insert the SpeedStor diskette and
will copy the HARDRIVE.SYS device driver to the HDD and
create the CONFIG.SYS file needed to load the driver.
5 -
When the process is completed, remove the SpeedStor
diskette and press CTRL-ALT-DEL to re-boot the system.
If the installation was successful, a copyright notice
from Storage Dimensions will appear and the system will
boot up to the C> prompt.
EPSON AMERICA SERVICE, 23610 TEL0 AVENUE, TORRANCE, CALIF. 90505

NUMBER: S-0072
PAGE:
2 of 2
ST-4096
The ST-4096 is a high capacity 5.25", full-height 80MB hard
disk drive. The drive parameters (1024 cylinders, 9 heads)
are not included in the Epson ROM BIOS version 2.20, or
earlier, drive type table. Under MS-DOS, you can use the same
procedure as for the ST-251 and obtain approximately 69MB
of usable storage (the 9th head is ignored).
A common application for this drive is in a file server for a
Novell network. This presents a problem as the NetWare
operating system works exclusively from the computer's ROM
BIOS drive type table, and does not honor the alternate
hard disk parameter table that programs such as SpeedStor
create.
Here is a solution for this situation that will yield
slightly over 70MB:
1 -Prior to physically installing the drive, turn it
over and locate pin 2 of the 34 pin edge connector.
This will be the first pin from the left on the
component side of the drive's printed circuit board,
when viewed from the rear of the drive.
2 - Mask off pin 2 with a small piece of thin tape -
regular adhesive tape works quite well. Do not overlap
onto pin 4.
3 - Install the drive and run the Epson SETUP utility.
Under MASS STORAGE, go to Drive C and select type 43
(1024 cylinders, 8 heads).
4- Perform the low-level physical format (HDFMTALL),
remembering to enter any listed bad track locations.
You are now ready to go on to the Novell installation
procedure. Refer to the NetWare Installation Guide for details.
(Note: the above procedure is also useful under MS-DOS 3.30.
After HDFMTALL, simply run FDISK to set up the partitions
and logical drives and then FORMAT each logical partition.)
Pin 2 is the HS3 (Head Select 3) signal, which is used to
select the 9th head. Masking this signal off will permanently
de-select the 9th head, preventing the system from generating
an error condition.
Although this procedure does not yield the full 80MB capacity
of the disk drive and is not recommended as a standard
practice, it may prove useful in certain situations.

Product Support Bulletin
Subject: Equity Series HDD Controllers Jumper Settings
Date:
6/12/89
Page:
1 of 8
PSB NO.: S-0070A
Originator: APA ap’
This bulletin provides information on the jumper settings for the hard
disk controllers used in Epson Equity computers.
Please refer to the following pages for information regarding specific
hard disk controllers:
Model # Page #
WD1002A - WX1 . . . . . . . . . .
2
WD1002S - WX2 . . . . . . . . . . 3
WD1003 - WAH . . . . . . . . .
4
WD1002 - WAH . . . . . . . . .
5
WHDC . . . . . . . . . . . . . . . .
6
WD1006S - WAH . . . . .. 7
ACB - 2320 . . . . . . . . . . . . .
8

HDD Controller WD1002A-WX1 (8-bit)
Model number --------
FACTORY SETTINGS
-- Extra jumper
Jumper Position Description
W1
N/A Not used.
W2
N/A Not used.
W3
1 to 2 BIOS ROM is enabled (on controller).
W4
2 to 3 Device address 320H.
W5
* hard-wired 1 to 2BIOS ROM size (32K or 64K).
W6
2 to 3 Reduced write current (< = 8 heads).
W7
* hard-wired 1 to 2IRQ 5.
W8
2 to 3 Disk controller I. D. (set to be the first).
* No jumper pins - 1 and 2 are connected by a PCB board etch.

HDD Controller WD1002S-WX2 (8-bit)
Jl
FACTORY SETTINGS
Jumper Position Description
I
I
0
Model number--j
W1
1 to 2
W-2
1 to 2
W3
1 to 2
W4
2 to 3
W5
* hard-wired 1 to 2
W6
2 to 3
W7 * hard-wired 1 to 2
Required for this configuration.
Required for this configuration.
BIOS ROM is enabled (on controller).
Device address 320H.
BIOS ROM size (32K or 64K).
Reduced write current (< = 8 heads).
IRQ 5.
‘--Extra jumper
* No jumper pins - 1 and 2 are connected by a PCB board etch.