Epson Equity III Product Support Bulletin page 18

EQUITY II MCY BOARD Y147205000 & Y147206000 JUMPER CONFIGURATIONS
MCY board Y147205000
and Y1472056000
differences.
MCY P/N Y147206000
boards have the
following improve-
ments over the
Y147205000 board.
* Serial port works
over 1200 baud.
* Concurrent oper-
ation of 8087 &
optional Dynamic
RAM or EGA/VGA.
* Topview fix in-
corporated on
MCY (main) board.
J1
* and J2 should be in position 2 to enable DMA RAM refresh to the
option slots for expanded memory boards or EGA/VGA video boards.
The 8087 will work in DMA refresh mode with the Y147206000 board.
J1
* and J2 should be in position
The V30 runs about 20% faster in this position. The jumpers must be
in position
* J3 and J4
* J3 and J4
keyboard.
NOTE: DO NOT ATTEMPT TO USE THE EPSON KEYBOARD WITH JUMPERS J3 AND
J4
On
Batt
Off
JUMPER
1
to enable an 8087 with the Y147205000 MCY board
should be in position 1 to use an IBM compatible keyboard.
should be in position 2 (default) for the Equity
POSITION 1 AS DAMAGE MAY RESULT!
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Reset Dip Switch
CONFIGURATIONS
1
to disable DMA RAM refresh.
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Vol. Keyboard