Re: [PARPORT] Parallel Port FIFO mode

Tim Waugh (
Wed, 23 Dec 1998 19:44:00 +0000 (GMT)

On Tue, 22 Dec 1998, Nicolas Souchu wrote:

> ReadThreshold is more variable. Just an issue for interrupt oriented
> transfers without DMA enabled though. Does your last source take DMA in
> account?

No, it doesn't. It also doesn't take WriteThreshold into account, or cope
with errors yet.

Actually, it polls for a few tens of microseconds to see if the FIFO is
completely empty, and if so it bursts a FIFO-full. With my printer, this
succeeds almost every time. I'm not sure how much of a win this is


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