[Unix-jun72] Why is V1 so slow?

Warren Toomey wkt at tuhs.org
Mon May 5 07:44:18 EDT 2008


On Mon, May 05, 2008 at 09:36:32PM +1000, Warren Toomey wrote:
> I think there are output delays in the kernel.

There certainly were. I've svn committed a patch to remove these lines
from u4.s, and that really speeds things up!

	Warren
 
1:
       cmp     r1,$11 / char = ht
       bne     1f
       movb    $15.,toutt+0 / set time out to 15 clock tics
1:
       cmp     r1,$15 / char = cr
       bne     2f
       movb    $15.,toutt+0 / set time out to 15 clock ticks



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