Hi Nicol,
Personally I advise all my customers to unload Jaws or Window Eyes when 
playing games for a variety of reasons.
First, games like Montezuma's Return are very system resource intensive. 
At any given time there is several sounds being played, mixed, and 
loaded and unloaded in real time which uses quite a bit of processor and 
memory resources. In addition there are internal clocks, called timers, 
running which draw upon your processor to perform hundreds of 
calculations and enemy AI decisions at or near the same time. The last 
thing you want when playing a game is for another program to be eating 
into your computers speed and memory resources when all that is going on.
Screen readers as a rule tend to be resource intensive applications in 
themselves. That is why when you load a large program or do a very 
resource intensive task Jaws or Window Eyes will be silent or 
unresponsive until the major process finishes. There is not enough CPU 
output or memory to run both applications at the same time so Jaws or 
Window Eyes tend to get called only after the app has finished doing 
whatever it was doing. I could get into various technical details on 
this, but I won't for your sanity's sake.
Second, APIs suchas DirectX were designed from the get-go to basically 
acquire and control your computers hardware independantly from the 
Windows event cue. What this means in average human speak is that 
DirectX actually acquires total control of your sound card, keyboard, 
joystick, vidio card, etc unless the developer specifically passes flags 
to let other sound events, mouse events, keyboard events, through to the 
device. Otherwise other apps can't use the device until DirectX releases 
hardware control back to the Windows event cue.
That is why Window Eyes and especially Jaws can encounter issues running 
at the same time as a game running DirectX DirectInput. Jaws might 
recieve an input call from the keyboard to do something, and your game 
app will recieve the same call to do something else and since both are 
trying to recieve control from the keyboard both actions are carried 
out, or it causes the keyboard to symply lock altogether. The only way 
to avoid this is to unload the screen reader, put it to sleep, or the 
developer has to add some other special keyboard handling in the game to 
let the  Windows keyboard events through when the game does not have 
focus on the screen.
Although weather or not you unload your screen reader or put it into 
some sleep mode is your choice I do think for the two reasons above it 
is more than compelling reasons not to get into the habit of running 
both at the same time if you can help it.


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