20 May
2007
20 May
'07
7:13 p.m.
Pete Turnbull <pete at dunnington.plus.com> skrev:
On 20/05/2007 03:22, Jerome H. Fine wrote:
What do you mean "unusual amount"? I've been running one 11/83 like that
for the last two years until today actually, when I upgraded to 4 megs. :-)
I used to run my 11/84 like that as well. Currently it's shut down.
Haven't had time to organize my computer room after I moved, so it just
sits there...
3 megs "unusual"? Hah! ;-)
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
> I have
also read that the MSV11-JD and MSV11-JE boards should NEVER
> be used together. Can anyone else confirm or deny this?
No reason not to, except that you'd end up with an unusual amount of
memory (3Mbytes). It certainly won't hurt anything, though of course
you would need to set the start address of the lower board to the
correct value. It's settable to any 16KB (8KW) boundary. > I suspect
that 3 * MSV11-JD boards may be used in a BA123 box with 4
> ABCD slots, but since I don't have any MSV11-JD boards, let alone 3
> of them, I can't verify this.
I don't recall ever trying *that*, but it too would work, so long as you
set the start address of each board correctly, and again you'd end up
with 3Mbytes, which is an unusual amount. The manual just says you can
use "one or more MSV11-J memory modules", without mentioning size or
maximum number. 
10:05 p.m.
On 20/05/2007 20:13, Johnny Billquist wrote:
Pete Turnbull <pete at dunnington.plus.com>
skrev:
On 20/05/2007 03:22, Jerome H. Fine wrote:
>> > I have also read that the MSV11-JD and MSV11-JE boards should NEVER
>> > be used together. Can anyone else confirm or deny this?
>
> No reason not to, except that you'd end up with an unusual amount of
> memory (3Mbytes).
What do you mean "unusual amount"? I've
been running one 11/83 like that
for the last two years until today actually, when I upgraded to 4 megs. :-)
3 megs "unusual"? Hah! ;-)
I completely agree with you, actually. It's just that DEC sold
microPDP-11 systems as standard with memories in exact powers of 2.
I've run systems with even more "unusual" amounts, according to what
random selection of memory cards I had at the time. I should definitely
have put "unusual" in quotes :-)
--
Pete Peter Turnbull
Network Manager
University of York
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