1 Feb
2002
1 Feb
'02
12:51 a.m.
On Thu, 31 Jan 2002, P.A.Osborne wrote:
On Wed, Jan 30, 2002 at 08:50:31PM +0100, Johnny
Billquist wrote:
I thought I only made one point, and that was that the argument for V6
being easier to port because "286 protected mode gives a very similar
handling on memory management as the PDP did".
Since V6 and V7 both run on the PDP-11 it can absolutely not be an
argument for preferring V6 to V7.
Thus I think it is a silly argument.
The rest is purely speculative on my behalf, and I really don't want to
debate wether V6 or V7 would be better to port.
I have a proper PDP-11 at home, and in addition, I run RSX, not Unix on
it. :-)
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On Wednesday 30 January 2002 10:18, P.A.Osborne
wrote:
Having looked through the source of v6 and v7 the comments are shall
we say minimalistic to people who are not as familiar with the PDP
architecture as say Ritchie and Thompson - ie ME! Hence the Lions
commentary makes life a darn site easier.
I am not disagreeing with the second point you have made. However the
point is that V7 is a development on from V6 and the memory management
is more complex and thus requires more work. Having had a rummage and a chat with acolleague
here at
UKC - it seems that V6 will be easier than V7, partially because
of the Lions commentary - but mainly because 286 protected mode
gives a very similar handling on memory management as the PDP did.
What a silly argument.
V6 and V7 both run on the PDP-11, so the memory
management hardware used by them both are the same.