Hej allesammen;
What's a 'bit slice'? Are they served with a twist of lemon?
I suppose a better way of asking that is how is a 'bit sliced' processor
or ALU differentiated from a 'normal' one?
ok
r.
At 10:26 PM 6/10/98 -0400, William Donzelli wrote:
>> Packard Bell: Today's headache, tomorrow's obscure collectible. Hey, you
>> never know: People might start collecting only the badly designed systems.
>> It could happen.
>
>OK, enough Packard-Bell bashing. Send me every PB model 250 you can get
>your hands on - I will even pay shipping (and for the crate).
Heh heh. I thought that comment would flush out a PB person or two. :)
They have actually gotten alot better, but I don't think you'll ever see
any in the Smithsonian like some classic systems.
-
- john higginbotham ____________________________
- webmaster www.pntprinting.com -
- limbo limbo.netpath.net -
Mac XTs where the first as far as I know Mac clones.............
bascailly a Mac in a IBM 5150 case.........
Desie
-----Original Message-----
From: nerdware(a)laidbak.com <nerdware(a)laidbak.com>
To: Discussion re-collecting of classic computers
<classiccmp(a)u.washington.edu>
Date: Monday, June 08, 1998 1:47
Subject: Re: Early Mac Clones
Date sent: Sun, 07 Jun 1998 13:46:25 -0400
Send reply to: classiccmp(a)u.washington.edu
From: Ward Donald Griffiths III <gram(a)cnct.com>
To: "Discussion re-collecting of classic computers"
<classiccmp(a)u.washington.edu>
Subject: Re: Early Mac Clones
> Zane H. Healy wrote:
>
> > I think that's the same book I've got a copy of around here.
Interesting
> > reading, but I've basically never seen any of that stuff anywhere.
Though
> > I found it really interesting, has anyone ever seen a Mac Plus or
simular
> > system recased into a PC case? It would be a fun project, but I've got
to
> > many other projects :^)
> >
> > The closest I've got to a Mac clone (I'm writting this on a PowerMac
> > 8500/180) is a Amiga 3000 with emulation software. The Amiga is
actually
> > about as fast as the real thing.
>
> I had a coworker in the late 80s who had his Mac and his Amiga 2000
> recased and rack-mounted, sharing a rack with a lot of _serious_
> video editing gear.
> --
IIRC, NewTek (makers of the Video Toaster) decided that since they were
having some trouble getting the Toaster accepted in the mainstream because
most people thought the Amiga was only a toy, they created an interface card
for a Mac that would allow the Mac user to run the Toaster-equipped A2000
(private-labeled for NewTek) from his Mac, thereby making it 'legit'.
I had to laugh at the thought of paying a grand or more just to see the
Amiga
Workbench come up on a Mac screen instead of the "toy" Amiga screen. Of
course, this 'toy' made multimedia possible before Uncle Bill said it was ok
to
use it.....too many people forget that. Not you guys, though. (I hope.)
One of my other favorite Amiga stories was something I swear I read in
AmigaWorld or Byte -- right after the A1000 came out, Gates had a press
conference to talk about Windows. Some reporter asked him about
multitasking, and Gates replied that multitasking really wasn't possible in
anything under 8 megs of ram. To which the same reporter replied, "But
doesn't
your own Amiga Basic multitask nicely on a 512k Amiga?"
A question which Gates promptly ignored and moved on.........
Paul Braun
NerdWare -- The History of the PC and the Nerds who brought it to you.
nerdware(a)laidbak.com
www.laidbak.com/nerdware
In general, file systems seem to fit into several simple categories.
Let's say UNIX-like, DOS-like, simple (just data), and that's about it
I've looked at Apple manuals, and the Apple ][ format is kinda like
DOS in terms of having an array of blocks and stuff. Except Apple's
is quite a bit more elegant. Since some people here are fond of
praising the VAX, how does its file system work (typically)?
>
>That used to be one of my interview questions for Unix programmers:
your
>buggy program just created a filename with {control characters, leading
>dash (-), leading slash (/), '*', etc} in it. How do you delete it?
>
>Does anybody collect file systems? That would be semi-useful for
somebody
>doing data recovery. I have no idea what the Newton "soup", for
example,
>looks like. One of my favorites was the Regulus (unix-like)
filesystem.
>It maintained a bitmap of free blocks and could easily allocate a
best-fit
>contiguous region for your file (I think they had an option to creat()
for
>contiguity). This made file access *fast* when you needed it. I still
>find fragmentation a nightmare even on Linux.
>
>-- Doug
>
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
IF you mean the AC adaptor, you can use later ones (powerbook). This
is actually beneficial because later ones are strong enough to power the
machine alone, while the Mac Portable one needed the battery to be
inside and working. I powered my mac portable for a few months w/two
adaptors. The I put the battery in. Happily, it recharged fully from
that high current (it was dead otherwise; I got the portable because it
wouldn't start up because of the battery. I got it to run by hooking the
battery up to mains AC long enough to "recharge" it).
>I was wondering if anyone had a Mac Portable power supply, and wanted
to
>sell it cheap.
> Thanks :),
> Mike Sheflin
>
>______________________________________________________
>Get Your Private, Free Email at http://www.hotmail.com
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
How do UNIX files work? Is there a header of some sort?
BTW, I think it's an incredible pain that the Mac has no built in
way to change file types. If they get lost, I have to used DiskEdit
or some such thing to restore them.
>
>Even the Mac or its apps seemed to be confused about the nature of
>what should be in the resource fork - some apps stored all their
>data there, using it as a sort of mini-database of tagged chunks
>of data. If there's anything classic about today's computers,
>it's the nearly universal recognition that a file's a file.
>Departures from this are interesting but rare.
>
>The other non-file info such as the filename itself, the date stamp,
>attributes, etc. are treated in an incidental fashion. The Amiga
>file system, for example, had a "file comment" of about 80 characters
>of extra text to describe the file that wasn't always preserved.
>This may have been inherited from Tripos.
>
>And then there's the way something like the effects of Radix-50
>(packing three chars into two bytes) has percolated through the
>years as three-character filename extensions from RT-11 (or
>earlier?) to CP/M to DOS and Windows, which are overused and
>abused in many ways.
>
>One of my latest three-great-ideas-before-breakfast ideas is
>to write a program for Windows that sniffs and identifies files
>in the manner of Unix's "file". That's the problem with files as
>files: you can easily lose track of what's in them, especially
>if you lose that three-char extension, or it gets wrapped in
>an archive format or attachment, etc.
>
>- John
>Jefferson Computer Museum <http://www.threedee.com/jcm>
>
>
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Before we go any further, which Packard Bells are we talking about?
I don't know the old ones (I rescued a 286 PB still in the box from a
compactor about a year ago and hid it where I thought it would be
safe; I doubt they will ever get that ceramic off the dumpster's ram),
but the new ones are ugly and had that stupid navigator thing that
looked like screenshots from Myst (do they still?). But, how bad
can a design get (am I asking for it?)?
>You mean there's a difference? :)
>
>Packard Bell: Today's headache, tomorrow's obscure collectible. Hey,
you
>never know: People might start collecting only the badly designed
systems.
>It could happen.
>
>
>-
>- john higginbotham ____________________________
>- webmaster www.pntprinting.com -
>- limbo limbo.netpath.net -
>
>
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
I was wondering if anyone had a Mac Portable power supply, and wanted to
sell it cheap.
Thanks :),
Mike Sheflin
______________________________________________________
Get Your Private, Free Email at http://www.hotmail.com
Bit slice processors are designed so that they can be ganged together with
suitable interconnection, making an 8 bit ALU out of 2 - 4 bit units, etc.
Generally good for accumulators etc with more complex instruction decoding
outboard.
My 2 cents...
Kevin
At 02:39 PM 11/06/98 -0400, you wrote:
>
>Hej allesammen;
>
>What's a 'bit slice'? Are they served with a twist of lemon?
>
>I suppose a better way of asking that is how is a 'bit sliced' processor
>or ALU differentiated from a 'normal' one?
>
>ok
>r.
>
>
>
On Jun 11, 3:36, Doug Yowza wrote:
> That used to be one of my interview questions for Unix programmers: your
> buggy program just created a filename with {control characters, leading
> dash (-), leading slash (/), '*', etc} in it. How do you delete it?
Quickest general method is "rm -i *", though you may sometimes need
"rm -i .*" instead/as well.
--
Pete Peter Turnbull
Dept. of Computer Science
University of York
