5 May
2008
5 May
'08
5:36 p.m.
On Mon, May 05, 2008 at 07:10:11PM +1000, Peter Jeremy wrote:
I think there are output delays in the kernel, probably to deal with
the speed of mechanical output devices. When I use the compiler, the
compilations are fast, but doing an ls -l /bin takes ages. We might be
able to tweak out the delays.
For example, grep delay build/u9.s, and these lines in u4.s:
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
2:
rts r0
Cheers,
Warren
On Mon, May 05, 2008 at 02:52:29PM +1000, Warren
Toomey wrote:
Yep :)
i= *c & 0277;
^^^^
0377 maybe But it's
very sloooow. I wonder why; V7 on simh is much faster than V1.
Is V1 executing more instructions to get the same thing done or is simh
managing to execute V7 instruction streams (or maybe emulate higher-end
PDP-11's) better? Judging by some of the earlier hardware comments,
maybe V1 is thrashing.