Octagon 5420, User Manual

5.

Make sure the BIOS jumper is enabled — W2[1–2].

6.

Power on your Micro PC System.

7.

A BIOS and DOS message similar to the following should
appear on your display:

Octagon 50xx BIOS vers x.xx

Copyright (c) 1992-1995, Octagon Systems Corp.

All Rights Reserved.

8.

Due to loading of the Vee source, the Vee voltage will probably
require additional adjustments at this time in order to obtain
proper contrast.  With the power on, remeasure Vee at J1
pin 24 and adjust R6 for the correct voltage.

USING THE 5420 IN A DESKTOP PC WITH A FLAT PANEL

USING THE 5420 IN A DESKTOP PC WITH A FLAT PANEL

USING THE 5420 IN A DESKTOP PC WITH A FLAT PANEL

USING THE 5420 IN A DESKTOP PC WITH A FLAT PANEL

USING THE 5420 IN A DESKTOP PC WITH A FLAT PANEL

Programming the 5420 video BIOS while in a desktop PC is
possible to do, but certain cautions must be heeded.  Memory
manager software, such as HIMEM.SYS, QEMM, and 386MAX, for
example, must NOT be running, and any memory shadowing, as
well as CPU cache, must be disabled.  If these situations exist
while programming the video BIOS, the video BIOS will become
corrupted and the desktop system will lock up with NO way to
reprogram the 5420 without using an Octagon Micro PC Control
Card.

To program a 5420 video BIOS in a desktop PC:

1.

Disable all memory shadowing and CPU cache in the desktop
PC configuration setup.

2.

Power off and disable the video in the desktop PC.  Install the
5420 SVGA card and attach the PC monitor to the 5420 DB-15
connector.

3.

Boot the desktop PC with a SYSed DOS diskette without a
CONFIG.SYS or AUTOEXEC.BAT file.  This diskette will also
need the file PGMVIDEO.EXE and the .DAT file to be pro-
grammed into the 5420 card.

5420 Super VGA Video Card – 12