Epson Equity 286 PLUS Dimensions

EPSON
Product Support Bulletin
Subject: Equity Series SIMM Compatibility
Date: 12/4/91
Page(s): 1 of 1
PSB No: S-0136
Originator: JAD
Due to the influx of third party SlMMs on the market, there are some that are not
compatible with Epson products. This bulletin is intended to be an aid in ensuring
that only compatible SlMMs are chosen for use in Epson’s Equity Series of
computers.
The SlMMs in question were SEIMENS, CUMULUS and KINGSTON. Installing these
SlMMs in Epson products may cause the following errors:
Parity Check 1
18FFFE 0000 202 Memory Address Error
164 System Options Not Set
1500 E000 201” DOS RAM Address Error
It was thought that the chips used in these SlMMs were of poor quality.
Epson Portland evaluated the SlMMs in question and found that this was not true.
The problem is caused by the SIMM circuit boards (ITE and TECAP circuit boards)
used to manufacture the SIMM modules. The dimensions of these boards are not
compatible with industry standard SIMM sockets. This may result in incomplete
contact between the SIMM assembly and it’s socket. This is caused by insufficient
size of the contact surfaces in these products. Also enlarged holes in the TECAP
product allow the component pin to pass entirely through the hole without making
contact.
It is recommended that only SIMMS meeting industry standard contact surface
specifications be used in Epson Equity computer products.
Some recommended SlMMs that were tested and found Compatible are:
Toshiba
Matsushita
CDC Enterprises
Samsung
Aculogic
For more information contact Technical Support.

EPSON
Product Support Bulletin
Subject: EQUITY 286 PLUS Diagnostics Upgrade
Date: 8/7/91 PSB No: S-0132
Page(s): 1 of 1
Originator: MWT
The Diagnostics utility for the EQUITY 286 PLUS has been upgraded from version
3.15 to version 3.20. The reason for the upgrade was to provide a keyboard layout
to match the 101-key keyboard that is supplied with the EQUITY 286 PLUS.
This file is available for downloading from the Epson Bulletin Board System. The file
is located in the /80286L library under the filename 286DlAG.EXE. This is a self-
extracting file - simply download it with protocol and type 286DIAG. This will
extract the file DIAG.EXE which should be 84,673 bytes in size with a creation date
of 05/10/91.
Please make this upgraded file available to your EQUlTY 286 PLUS customers on
an as-needed basis.

PSB No.: S-0062I
Page: 1 of 18
EQUITY 286 PLUS
VER PART # DESC TYPE L C REAS N
030191-K2 Y727590801 AMI 27C010 U10 INITIAL RELEASE
081592 2011038 AMI 27C010 U10 Rapid keystrokes on all areas of the
keyboard may cause a shift key lock
and/or keyboard lockup. In some
rare cases, improper keyboard timing
may cause intermittent system boot
failure.
See ECN EQ286+-003 (4/2/93).
EQUITY III
VER PART # DESC TYPE L C REAS N
L1.07
H1.07
KQQNK1019A
KQQNK1020A
27128D-2
27128D-2
M27C128
M27C128
U147
U146
INITIAL RELEASE
L1.09
H1.09
27128D-2
27128D-2
M27C128
M27C128
U147
U146
To allow the use of drives with more
than 8 heads.
L1.10
H1.10
KDPN0000100
KDPN0000110
27128D-2
27128D-2
M27C128
M27C128
U147
U146
Requires U99 chip upgrade to
DEC01A. Fixes problems with drive
type table, 3270 emulation, Novell 286
v2.0a and Thesys Fastcard III.