Re: help on DMA programming

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#101

From: Jerzy Tarasiuk
Date: Fri, 03 Nov 1995 00:00

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>>>>> "S" == Synectics Medical AB <synmedab@algonet.se> writes:

S> Hi !! I am trying to program the PC dma controller to do any stupid 
S> thing...just trying to learn how it works...does anyone have a simple 
S> -SIMPLE-  code performing something  not too complicated? ( eg: moving into 
S> video 
S> memory an image using memory to memory tranfer mode...something not too 

I tried memory-to-memory transfer on many machines, never it
was working correctly (the DMA chip supports it, but machine
doesn't). On present machines it is nonsense - DMA transfer
slows programs (by using bus) more than using CPU for the
transfer. The problem was already discussed many times...

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From: jt@fuw.edu.pl (Jerzy Tarasiuk)
Subject: Re: help on DMA programming
Date: 1995/11/03
Message-ID: <wz91lx7ov1.fsf@albert5.fuw.edu.pl>
X-Deja-AN: 118548396
references: <Pine.SOL.3.90.951031164702.10504B-100000@sophocles.algonet.se>
organization: Warsaw University, Physics Department
reply-to: jt@zfja-gate.fuw.edu.pl (Jerzy Tarasiuk)
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