Re: TurboRez - Released Yet?

[wsgentry@ne3005.reston.ingr.com (Scott Gentry)]

bazyar@teal.csn.org (Jawaid Bazyar) writes:

>wsgentry@ne3005.reston.ingr.com (Scott Gentry) writes:

>>I might be able to shed some light on this... I burned an experimental ROM
>>for the Enhanced Vision Plus digitizer the other night that tried DMA
>>at full speed.  No go.  Nice crashes.  :)

>  But the digitizer DMAs to screen memory. 

Only if I tell it to, Jawaid.  :-)

> That will in fact produce
>some rather spectacular fireworks, since all kinds of data will be lost
>as the card tries to stuff at 2.8MHz memory that operates at 1MHz.

Yup, you're right, but remember, _I_ as the programmer can limit, specify,
and yes, even NOT digitize to screen memory.  

>  Derek
>Taubert built a simple DMA device and can DMA just fine from banks 0/1
>at 2.8MHz.

Good for him.  I'm kind of surprised you assumed the DMA address
range for the EV+.

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