Re: Distorted sound with DOS 3.3 Launcher

[dempson@atlantis.actrix.gen.nz (David Empson)]

In article <11OCT199503594554@vax2.concordia.ca>,
Mitchell Spector <spector@vax2.concordia.ca> wrote:
> 	A few weeks ago I installed John MacLean's DOS 3.3 Launcher 
> (version 2.1) on to my hardrive and proceeded to convert various 5.25
> diskettes to use with it.  [distorting sound effects and music]
> 
> 	I'm using it on an IIgs, launching the images by double-clicking
> the DOS3.3 image-icons from the System 6.0.1 Finder. Is this a side effect
> of GS/OS, where sound should be distorted?

Probably.  If you boot GS/OS, you are much more likely to have timer
interrupts running in the background, e.g. for AppleTalk, screen
blankers and other system add-ons.

These will be interfering with the timing for code generating sound or
music by toggling the speaker (i.e. all DOS 3.3 programs).  This will
be much more noticeable on an unaccelerated IIgs.

Booting directly into ProDOS-8 will probably avoid most of the added
overhead.

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