Epson Equity II Product Support Bulletin(s) - Page 21

Equity Ii Mcy Board Y147201000 Rev. 01 & 02 Jumper Configurations

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EQUITY II MCY BOARD Y147201000 REV. 01 & 02 JUMPER CONFIGURATIONS MCY board Y147201000 revision 01 and 02 differences. Revision 02 MCY boards have the following improvements over the 01 revision MCY board. * Serial port works over 1200 baud. * Concurrent oper- ation of 8087 & optional Dynamic RAM or EGA/VGA. * Topview fix incorporated on MCY (main) board. Reset Dip Switch Vol. Keyboard JUMPER CONFIGURATIONS * 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. An 8087 will function concurrently with dynamic RAM boards on Rev. 02 boards with the jumpers in position 2. * J1 and J2 should be in position 1 to disable DMA RAM refresh. The V30 runs about 20% faster in this position. 8087-2 enabled on Rev. 01 MCY board. * J3 and J4 are not available on these versions of MCY board. Non-Epson keyboards cannot be used. ----- Page 4 of 6 -----

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EQUITY II MCY BOARD Y147201000 REV. 01 & 02 JUMPER CONFIGURATIONS
MCY board Y147201000
revision
01
and 02
differences.
Revision 02 MCY
boards have the
following improve-
ments over the 01
revision MCY 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.
Reset
Dip Switch
Vol.
Keyboard
JUMPER CONFIGURATIONS
*
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.
An 8087 will function concurrently with dynamic RAM boards on
Rev. 02 boards with the jumpers in position 2.
*
J1
and J2 should be in position
1
to disable DMA RAM refresh. The
V30 runs about 20% faster in this position.
8087-2 enabled on
Rev. 01 MCY board.
* J3 and J4 are not available on these versions of MCY board.
Non-Epson keyboards cannot be used.
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