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EPSON AMERICA, INC.
Product Support Bulletin
Subject: Equity 386/20 Using Memory Above 2MB
Date: 10/09/92
Page(s): 1 of 1
The purpose of this bulletin is to provide information on a problem which may occur
when using more than 2MB of memory in the Equity 386/20 computer.
When expanding memory above 2MB for memory intensive applications
(Networking software, AUTOCAD, LOTUS 1-2-3), insure that ROM BIOS version
1.11 or higher and the corresponding CHIPS set are being used, and a Revision 02
CHET-RM board is installed.
If the Equity 386/20 is to be used in the applications mentioned above and it does
not have the component versions described above, they can be ordered with the
following part numbers:
ROM BIOS
CHIP
Set
S
CHET-RM Board
Reference Disk
The problem does not occur in units that have this configuration.
NOTE
The chips in location 7L and 9F can be identified by the numbers printed on the top
of the chips, these are the old and new numbers:
LOCATION
7L
7L
9F
9F
REFERENCE:
Engineering Change Notice EQ386/20-001A
(current)
(Rel. 2.16)
TYPE
CHIP NUMBER
P82C302-20
OLD
NEW
P82C302C
P82C206F-1
OLD
NEW
P82C206H
PSB No: S-0123A
Originator: JDB/KAS
Y184802004 (CHE-B5)
Y184801004 (CHE-A5)
X403823021 (7L) Memory Controller
X403822061 (9F) Int. Peripheral Controller
Y184202100 (02 rev #)
Required for User-Defined drive types and
types 59-63 and the use of 1.44MB FDD as
drive A:. (When using BIOS rel 2.10 or
higher). Available on the Epson RBBS.
Lot. 9B
Lot. 9C
PART NUMBER
X403823020
X403823021
X403822060
X403822061