On Wed, 12 May 1999, Thor Lancelot Simon wrote:

> On Tue, May 11, 1999 at 03:06:58PM -0700, Jonathan Stone wrote:
> > 
> > Thor, why on earth do you say that? There's, what, a 3-byte fifo, and
> > 57600 bits/sec at 1 start bit and 1 stop bit comes out under 2k
> > interrupts/sec.  Not at all outrageous for a 25Mhz r3000.
> 
> Isn't it the 85230 that has the 3-byte FIFO, and the plain 8530 with just 1
> byte?

Nope, the 8530 (and 85C30 and 85C80) all have a 1-byte transmit fifo and a
3-byte receive fifo. The 85230 has a fatter receive fifo at 8 bytes, and
has the ability to interrupt after either 1 or 4 bytes are received. I
think the transmitter's 3 bytes deep.

Take care,

Bill