10 Jul
1998
10 Jul
'98
6:50 p.m.
I came across a performa 636cd, (i know, under 10 yrs by far.) but this
is a more generic question. It has a 68LC040 processor; I need a straight
68040 for NetBSD... is it possible to nab one of these from someplace and
just put it in? besides any clock speed issues & whatnot, are they all the
same "under the hood" ? or are they all different. I guess this applies to
several other systems I have, since I'm interested in upgrading other things
as well. any info appreciated. thanks!
-Eric
10 Jul
10 Jul
7:42 p.m.
I came across a performa 636cd, (i know, under 10
yrs by far.) but this
is a more generic question. It has a 68LC040 processor; I need a straight
68040 for NetBSD... is it possible to nab one of these from someplace and
just put it in? besides any clock speed issues & whatnot, are they all the
same "under the hood" ? or are they all different. I guess this applies to
several other systems I have, since I'm interested in upgrading other things
as well. any info appreciated. thanks!
-Eric
It requires a special accelerator board to change the CPU on a Mac. It's
my guess that at best it wouldn't work, at worst it would fry something.
However, can't you add an FPU to the Performa? I seem to remember that you
can do such things, but...
Zane
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11 Jul
11 Jul
4:33 a.m.
Eric writes:
...a more generic question. It has a 68LC040
processor; I need a straight
68040 for NetBSD... is it possible to nab one of these from someplace and
just put it in? besides any clock speed issues & whatnot, are they all the
same "under the hood" ? or are they all different. I guess this applies to
several other systems I have, since I'm interested in upgrading other things
as well. any info appreciated. thanks!
I can's speak for the Mac, but I did upgrade the 68EC030 (no MMU) to
a full 68030 on my Amiga 4000/030. It has a daughter card with the CPU
and FPU that snaps into a so-called "Fast" slot. I removed the old chip
(QFP) and soldered on the new one. I do not receommend it unless you have
extensive SMT experience. It does, however, work.
The reason I can't say whether it will work for a Mac is that Apple is
picky. The Toolbox ROMs *might* expect certain things from certain models
of CPU, and freak out if the wrong processor is installed. I just don't
know enough about Mac firmware to say. The hardware, OTOH, will be fine.
-ethan
2:40 p.m.
I can's speak for the Mac, but I did upgrade the
68EC030 (no MMU) to
a full 68030 on my Amiga 4000/030. It has a daughter card with the CPU
and FPU that snaps into a so-called "Fast" slot. I removed the old chip
(QFP) and soldered on the new one. I do not receommend it unless you have
extensive SMT experience. It does, however, work.
That's big time gutsy, normally taking a soldering iron to a computer
doesn't bother me, but the though of messing up an Amiga accidentally does!
I still haven't worked up the nerve to do the INT2 upgrade on my A3000 (in
part because I've not come up with the cash for an Accelerator, in part
because it's such a pain to work on).
BTW the 68040 daughter cards (3640 IIRC) are dirt cheap now, you can find
Rev. 3.2 for $200 or less, and earlier revisions are even cheaper. The
down side to the Commodore 68040 board is it doesn't have any additional
RAM slots on the card.
The reason I can't say whether it will work for a
Mac is that Apple is
picky. The Toolbox ROMs *might* expect certain things from certain models
of CPU, and freak out if the wrong processor is installed. I just don't
know enough about Mac firmware to say. The hardware, OTOH, will be fine.
This is part of the problem. In fact I believe this is why when using a
Macintosh Emulator on an Amiga you can use some ROMs but not others.
-ethan
Zane
| Zane H. Healy | UNIX Systems Adminstrator |
| healyzh(a)ix.netcom.com (primary) | Linux Enthusiast |
| healyzh(a)holonet.net (alternate) | Classic Computer Collector |
+----------------------------------+----------------------------+
| Empire of the Petal Throne and Traveller Role Playing, |
| and Zane's Computer Museum. |
| http://www.dragonfire.net/~healyzh/ |
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