User`s guide

EPSON
EPSON AMERICA INC.
SERVICE DEPARTMENT
PRODUCT SUPPORT BULLETIN
DATE:
3/28/88
NUMBER: S-0041
SUBJECT: EPSON EQUITY I/II/III ENHANCED KEYBOARD COMPATIBILITY
The purpose of this bulletin is
to provide information regarding
the compatibility of
third party enhanced "AT" style keyboards
with the Equity I,
Equity II and Equity III computers.
1. Keyboard Compatibility
The enhanced Equity "Plus"
series keyboard cannot be used on an
Equity I, II or
III. The enhanced Equity keyboard (as with
IBM's)
requires explicit ROM BIOS
support
which is not
available in the earlier machines.
It is
possible, however, to use a third-party "enhanced-style"
keyboard such
as the IBM XT-101, NorthGate C/T-101, Datadesk
Turbo-101, Keytronics 101, 5150 and
5151. Please note that
early versions of the Equity I (serial numbers unavailable) and
Equity II
(below serial number 29875) were not designed to
support
any
third
party
keyboards (they do not have any
keyboard-select jumpers on the main board).
The correct jumper settings for non-Epson keyboards are:
Equity
I: J2 and J3 jumpered
Equity
II: J3, J4 and J5 set for
position 1
PLEASE NOTE
Once the above jumper changes
have been made, attempting to
use the original Epson keyboard
will result in damage to the
keyboard and Equity main board.
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