Subject: Re: Bounce buffers for ISA dma
To: Michael Graff <explorer@vorpal.com>
From: Ken Hornstein <kenh@entropic.com>
List: port-i386
Date: 11/30/1994 13:09:08
>>Hmm, I didn't know they did it that way.  I suppose you could #ifdef it (whic
>h
>>you'll probably need to do anyway, since you'll want to enable it by a config
>>option anyway), but it would be a tad ugly.
>
>Why make it an option? If the drivers themselves do the bounce, they
>know if they need to or not.  If no bounce is needed, it's just one
>more if statement.

I am thinking of drivers that serve both ISA and EISA cards (the bt742 driver
comes to mind).  Also, isn't there a VLB version of the 1542?

>>Ok, so who wants to do it? :-)
>
>The problem is, unless I want to compile on a slow machine and copy a
>kernel around on a floppy, I can't do it easily.  I can test anything
>written though once I buy more memory.  ;)

As John Kohl pointed out, you could always do a sample implementation that
bounced at 8Mb, or something similar.

--Ken