Epson Equity 386/33 PLUS Product Support Bulletin page 6

6.
Changing hardware jumpers for Third-Party video support;
A.) Power down the system and change the hardware jumpers to disable the
embedded VGA adapter port on the system board. (Settings listed bold
are used in this configuration.)
J1
Onboard VGA video port:
(3" from rear of main PCB on RtSide)
A setting, Video port enabled
B setting, Video port disabled
B.) Install the video adapter in an available 16 bit expansion slot. Attach a
monitor to the Super Dual VGA adapter, lower port (primary video port).
Attach a secondary monitor to the upper port on the video card (secondary
video port).
C.) Power up the system and then both displays. The system will reboot and
load DOS. The secondary monitor will display the bios revision of the
video adapter until a Windows session is started. After ending a Windows
session, the second monitor will only display a blinking cursor in the upper
left corner of the display. This is normal operation of the display adapter.
Dual monitor support is only active by using the appropriate video driver
and application. Epson MS-DOS, MS-Windows 3.1 were tested without
any operation or video errors.
7. Video adapter hardware configuration:
A.) Factory Defaults were used throughout the testing process. There is one
dip switch block and 5 jumpers on the video card. Jumpers J3, J4, J5 can
be altered, jumpers J1 and J2 are for EPROM size and should not be
changed. Switch bank 1 (SW1) has 4 rocker setting for on or off. The
defaults are:
1=off 2=on 3=on 4=on.
Switches 1 and 2 sets the board to primary video base I/O address of
34C(hex) and secondary video base I/O address of 348(hex). Switches 3
and 4 sets the video adapter I.D. to zero (binary 00). This is done if
multiple Super Dual video adapters are installed. This information can be
found on page 4 and 5 of the Super Dual VGA Operations Manual.
PSB No: S-0157
Page: 3 of 4
J4 Color/Monochrome Monitor
(4.5" from rear of main PCB on
RtSide, 1" from the DC power
connector)
A setting, Color monitor attached
B setting, Monochrome Monitor
attached