Adrian (a.delete@this.acm.org) on October 5, 2021 11:28 pm wrote:
> David Hess (davidwhess.delete@this.gmail.com) on October 5, 2021 5:19 pm wrote:
> > Yuhong Bao (yuhongbao_386.delete@this.hotmail.com) on October 3, 2021 1:30 am wrote:
> > >
> > > Even on the IBM PC the 8237 memory-to-memory copy mode never were used.
> >
> > Embedded systems running on bare metal might have used it, and I think I remember seeing examples
> > in application notes, but didn't Dr. Dobb's Journal include an example on the PC in one issue?
> >
>
>
> The 8237 DMA was very seldom used for anything in IBM PC's (except in its legacy application in the floppy
> disk driver) not because it was a DMA controller, but because it was a very bad DMA controller.


A few NICs used it as well, but none I really remember as worthwhile.