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From: jwhite@com50.c2s.mn.org (Jeff White)
Newsgroups: comp.graphics,comp.windows.ms
Subject: Re: Problems with STB EM-16 VGA board
Message-ID: <1990Oct11.210055.10054@com50.c2s.mn.org>
Date: 11 Oct 90 21:00:55 GMT
References: <836@redford.UUCP>
Organization: Com Squared Systems, Inc.
Lines: 27

In article <836@redford.UUCP> bill@redford.UUCP (Bill Poitras(X258)) writes:
>Recently I bought a STB EM-16 VGA board.  It is also sold the PowerGraph
>VGA board.  It is based on the Tseng Labs 4000 chipset and uses AMI Bios. It
>has 1MB on board.  It comes with great drivers (640x480x256,800x600x256,
>1024x768x256) for windows 3.0.  My problem:  I have a WD1006/SR2 (RLL) HD/FD
>controller, and a ST277R (65M) drive.  My system is a 386SX with Pheonix BIOS
>(Chicony motherboard).  I have disabled bios on my drive controller.  When 
>the system boots up a different sound beep sound right before bootup, and 
>when my system is up, I can't write to the drive.  When I replace my VGA card
>with my old EGA card, the problem goes away.  Is this a problem with my
>VGA card?  Or is this just a incompatibility between the Tseng labs chip set
>and my controller.  Any help would greatly be appreciated.
>

I had similar problems with interrupts with a STB EM-16 (using a ET3000AX
chip).  As it turns out, old EGA used INT 2, and to maintain full
compatibility with EGA, so does the STB VGA card.  However, INT 2 is used
as the cascade interrupt for the slave 8259.  The solution might be to move
the IRQ2 jumper on the board.  On the EM-16 I have, its jumper J3, check
your documentation.


-- 
Jeff White                          |       {amdahl|hpda}!bungia!com50!jwhite
Com Squared Systems, Inc.           |       jwhite@c2s.mn.org
2520 Pilot Knob Road                |       (612) 452-9522 voice
Mendota Heights MN 55120            |       (612) 452-3607 fax