Megalextoria
Retro computing and gaming, sci-fi books, tv and movies and other geeky stuff.

Home » Archive » comp.sys.ibm.pc » DMA
Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend 
Switch to threaded view of this topic Create a new topic Submit Reply
DMA [message #281168] Wed, 05 November 1986 20:33
Anonymous
Karma:
Originally posted by: bright@dataio.UUCP (Walter Bright)
Article-I.D.: dataio.1189
Posted: Wed Nov  5 20:33:09 1986
Date-Received: Fri, 7-Nov-86 21:09:02 EST
Organization: Data I/O - FutureNet Corp., Redmond, WA
Lines: 9

I am interested in copying pixel data from one page to another on the
IBM EGA. This involves moving 128k bytes of data. Doing it with a
REP MOVSW takes about 1/2 second (on an AT), which is too slow.
Does anyone know
how the DMA channel could be programmed to do this? It is not clear
from the documentation how to program the DMA chip, or even if
it is capable of memory-to-memory transfers.

Thanks for any help.
  Switch to threaded view of this topic Create a new topic Submit Reply
Next Topic: HELP!! Have Baby Blue II
Goto Forum:
  

-=] Back to Top [=-
[ Syndicate this forum (XML) ] [ RSS ] [ PDF ]

Current Time: Fri Mar 29 06:21:55 EDT 2024

Total time taken to generate the page: 1.06117 seconds