Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!cs.utexas.edu!csd4.milw.wisc.edu!srcsip!falcon!rogers
From: rogers@falcon.SRC.Honeywell.COM (Brynn Rogers)
Newsgroups: comp.sys.ibm.pc
Subject: slowing the expansion bus
Summary: My bus runs at 10 Mhz, VGA isn't happy
Message-ID: <23217@srcsip.UUCP>
Date: 7 Jun 89 05:24:08 GMT
Sender: news@src.honeywell.COM
Reply-To: rogers@falcon.UUCP (Brynn Rogers)
Organization: Honeywell Systems & Research Center, Camden, MN
Lines: 23

I just got my VGA card (a Orchid Pro designer which I populated to 512k)
and It works great except for a couple of dropped bits.

My PC is a 10 Mhz DTK clone and I can always revert to 6 Mhz (out of turbo
mode) and the VGA card works perfectly.

At 10 Mhz (turbo) all the text modes work fine, but it drops a small percentage
of the bits sent to it in graphics mode.  It is more annoying than anything
else, but of course I want everything to be perfect.

A call to orchid revealed that moving the board to the slot closeest
to the power supple should help (it did a little) but it didn't fix it.

Can anyone suggest ways to add wait states to the IO bus?  
I am running 0 wait states with my main memory, but I didn't think changing
that would help.

Has anyone else had problems with a clone that pushes the IO bus to 10Mhz
instead of the 8Mhz it is designed for?  (I have four other cards that 
don't care about the speed)

 Brynn Rogers    Honeywell S&RC        rogers@src.honeywell.com
                                       nic.MR.net!srcsip!rogers