Re: What's wrong with //e video?

[spector@vax2.concordia.ca (Mitchell Spector)]

In article dempson@atlantis.actrix.gen.nz (David Empson) writes...
>
>>karl suhr <ksuhr@unlinfo.unl.edu> wrote: 
>>  HOWEVER, when I try to run King's Quest I, the graphics screen has 
>> vertical black stripes through it and the letters are garbled.  
> 
>How wide are the stripes?  Are they regularly spaced, and the same
>width as 80-column characters?  (Does anyone know if King's Quest tries
>to use double hi-res graphics mode?)

	Perhaps the jumper-block is missing from his Extended 80 columns
card? I had identical problems before I added a jumper to my card in 
one of my Apple IIe's. The pins on the card need to be connected in order
for Double-Hi-Res to function (newer versions of the card do not require
a jumper-block placed on pins, and sometimes require you remove it). There 
are two possible causes: 

A) The jumper-block is missing on his Extended 80 columns card
B) The motherboard does not support Double-Hi-Res (original Rev 'A')

	Either of the two _will_ cause vertical strips to appear when
trying to display Double-Hi-Res graphics. Usually you just see the first
Hi-Res page displayed with lines through it...

ps - Yes, Sierra's "King's Quest I" does indeed make use of DHR graphics.

>David Empson
>dempson@actrix.gen.nz
>Snail mail: P.O. Box 27-103, Wellington, New Zealand

Mitchell Spector
m_spect@pavo.concordia.ca / spector@vax2.concordia.ca