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MacIvory, 3620, and MicroExplorer performance
Date: Wed, 7 Sep 88 06:02:13 PDT
From: email@example.com (Scott B. Layson)
Date: Fri, 2 Sep 88 08:47 PDT
From: Mr.Spock@SAMSON.CADR.DIALNET.SYMBOLICS.COM (Mr. Spock)
Date: Fri, 2 Sep 88 08:47 EDT
From: Hornig@ALDERAAN.SCRC.Symbolics.COM (Charles Hornig)
Date: Fri, 2 Sep 88 02:20:48 EDT
From: firstname.lastname@example.org (Choong Huei Seow)
According to Symbolics [this was when I was at AAAI], this MacIvory has
a performance of a 3620 machine. Is the slowdown due to the Memory board
residing on a Nubus slot ?
The slowdown is due to the disks available for the Mac II being much
slower than the disks Symbolics now sells on its 36xx line. We expect
this problem to resolve itself as the disk manufacturers realize that
there is a market for fast disks.
Can you give us a rough idea of the CPU speed relative to, say, a 3670?
Well, that shoots the whole MacIvory down for me (rats!!). We have a
3620 and it's slower than molasses.
Bizarre. I have a 3620 I use all the time and it seems just about as
fast as a 3670. Well, the 190Mb ST506 disks are a tad slower than an
Eagle, but not "molasses" by any means, and the CPU feels identical
(said to be 10% faster? did I get that right?). Are you sure your
'20 isn't just short on memory? These days it's hard to get by with
less than 2Mw. If that's not the problem, maybe something subtle is
wrong with it.
Well, I normally work on a 3600 with 2Mw of memory and an IFU board.
Our 20 has 1.5Mw (I think, could be just 1) and 2 190Mb disks. I have a
real hard time bringing myself to sit in front of the thing because it's
so slow. Oh well, looks like it's time for an upgrade.
I hear from TI that the MicroExplorer CPU speed is roughly half that
of the Explorer II, which I gather puts it in the same ballpark as the
rest of these machines: 36x0, Ivory, etc. So the only machine being
shipped that has a substantial speed edge on the rest of the pack is
the Explorer II itself, which is still pretty expensive. But it's a
perfectly good machine if you don't mind debugging the system software
to use it...