HDTenEightyP/NetNews huggingface dataset:
From: cz@silver.lcs.mit.edu (Christopher R. Zach)
Newsgroups: comp.sys.mac.hardware
Subject: Mac Plus Power supply SOLVED
Summary: Boy, that was fun
Date: 25 Jan 93 00:58:37 GMT
Organization: MIT Laboratory for Computer Science

Well, it looks like I have finally fixed that power supply problem that I was
having with my Mac Plus after upgrading it's memory. Detalied description
follows...

After swapping the power supply logic board with one from a 512K Mac, the
Plus motherboard gave the same problems (power supply would cycle). I then
hooked up an external 400K floppy to the Plus motherboard, and tried again.
This time, the system came up without cycling. The screen wouldn't come up,
but when I hooked the SCSI drive up to the motherboard, the system accessed
the SCSI drive and "Booted" the system. Still no display, though.

Well, this was interesting. Swapped the 512K motherboard back in, and that
came up, so this eliminated the power supply board and monitor. Hm... 
Maybe the problem is that the Plus is not drawing ENOUGH power due to a
failure in some circuit on the motherboard to energise the video display.
A close check of the motherboard revealed a nick where my pliers slipped as
I cut the R8 resistor. Hm... I then sanded the insulation off the PCB 
insulation, soldered a bridge wire around the nick, and the system came up.
This was good. A quick adjustment of the PS to get me up to 5.03 volts, and
everything was back to normal.

Now this leaves me with a friend's Mac 512K that works, but I don't need to
cannibalize it for parts. My new question is: What can one do with a Mac 512K?
Is there enough memory for it to run most applications, can one put a Lisa
hard drive on the floppy controller, can one buy a turbo motherboard and use
the 512K ROMS? Is it worth the powder to blow it to hell, and does it run 
AppleTalk? I wouldn't mind having a spare Mac around, but not if it's useless.

Thanks for the help

CZ
Xref: sparky comp.sys.mac.hardware:26612 comp.graphics:14096
From: paul@taniwha.UUCP (Paul Campbell)
Newsgroups: comp.sys.mac.hardware,comp.graphics
Subject: Re: Why 32,768??
Date: 18 Jan 93 21:25:44 GMT
Organization: Taniwha Systems Design

In article <1ja2csINN6po@gap.caltech.edu> madler@cco.caltech.edu (Mark Adler) writes:
>
>Actually, the same analysis I did says that 8+9+7 is better than that.
>And for 12 bits, 4+5+3 is better than 4+4+4.  So why do they use equal
>R, G, and B bits?

I think two reasons: because the RAMDACS are 8+8+8 (even true-color systems
these days use RAMDACS for gamma correction etc) - for a RAMDAC you need 

	 R     G     B
	2  +  2  +  2		entries in your RAM tables

If each entry is the same size as your index it's

	   R	  G	 B
	R*2  + G*2  + B*2	bits

For 8+8+8 it's 2048+2048+2048 = ~6k bits

For 8+9+7 its 8*256+9*512+7*128 = ~7.5k bits
	(or a ~25% increase in die size and cost plus the size of
	 the DAC goes up with the square of the index)

Secondly on many cpus it's much cheaper to assemble bytes to make a 24-bit
pixel than odd sized bits that require shifting and masking - I've seen a
number of software digital video codec that run faster in 24-bit mode than
16-bit even though it seems that you shouldn't have to move as much data.

	Paul
	

-- 
Paul Campbell    UUCP: ..!mtxinu!taniwha!paul     AppleLink: CAMPBELL.P
"Finally after much thought he tied a dollar bill to the top of the tree, it
seemed to fit - after all it was the premier capitalist holiday, besides after
the 'fall' of communism a star didn't seem appropriate anymore ..."
From: peirce@outpost.SF-Bay.org (Michael Peirce)
Newsgroups: comp.sys.mac.hardware
Subject: Re: I'm think about getting a Mac, but ...
Date: 28 Jan 93 01:28:33 GMT
Reply-To: peirce@outpost.SF-Bay.org (Michael Peirce)
Organization: Peirce Software
X-Mailer: uAccess - Macintosh Release: 1.6v1


In article <C1DpIv.F7v@ccu.umanitoba.ca> (comp.sys.mac.hardware), sdyck@ccu.umanitoba.ca (Sheldon Dyck) writes:
> Hi, I'm a long time Dos user who is going to be buying a new computer
> in a few weeks.  I have been looking at Macs and they look like really
> nice computers.  The only reservations I have about buying one is that
> it seems like they don't have resolutions higher then 640*480.  Unless
> you want to get the video board from NEC or some other expensive 
> solution.  Is this true?  If I'm paying $3000(cdn) I would expect higher 
> resolutions then 640*480.  Could someone clear this up for me please.

In the Mac word people use the word "resolution" a bit differently
than in the PC world.  

In the Mac world, screen resolution is almost always 72 dpi (dot per
inch) or very close to this.  The number of pixels on the screen is
determined by how big the monitor is.  A 13" monitor can display 640x480
pixels at roughly 72 dpi.  A 16" monitor can display 624x832 pixels.

Mac folks stick with roughly 72 dpi screen resolution (for the most
part - there are a few exceptions) because this provides WYSIWYG (what
you see is what you get) between screen and printout.  Also 72 dpi
is what the software expects.

TO get mor resolution on a Mac display you get a bigger monitor.

--  Michael Peirce      --   peirce@outpost.SF-Bay.org
--  Peirce Software     --   Suite 301, 719 Hibiscus Place
--                      --   San Jose, California USA 95117
--  Makers of:          --   voice: (408) 244-6554 fax: (408) 244-6882
--             Smoothie --   AppleLink: peirce & America Online: AFC Peirce
From: rshangle@csugrad.cs.vt.edu (Rick Shangle)
Newsgroups: comp.sys.mac.hardware
Subject: Re: StyleWriter II - II thumbs up!
Date: 22 Jan 93 03:14:14 GMT
Organization: Virginia Tech Computer Science Dept, Blacksburg, VA


  Is the StyleWrite II print driver available from any of the normal outlets
(ftp.apple.com, et al.) or is it only available bundled with the printer?
I'm asking because I have an original StyleWriter and I've read that the new
driver works well with the original, including the Gray scale functions. I'm
not expecting the speed increase or anything, but I'm curious.

rick


-- 
/*                                   \\  
/* Rick Shangle                       \\  "The only truth I know 
/* rshangle@csugrad.cs.vt.edu          \\  is the look in your eyes."
/* Virginia Tech Computer Science Dept. \\         - Ministry
From: flowers@cco.caltech.edu (Dave Flowers)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Quadra 700 SIMM installation problem
Date: 22 Jan 1993 05:09:46 GMT
Organization: California Institute of Technology, Pasadena
Reply-To: dflowers@caltech.edu
NNTP-Posting-Host: punisher.caltech.edu

	I had the same problem (well, I was going from 4 Meg to 20 Meg,
overall).  I solved it by reinstalling the system, after which the 4 Meg
SIMMs worked fine.  No, I don't know why this worked.
From: g-man@phsbbs.princeton.nj.us (Greg Sachs)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Motorola's 68060 for the Mac
Date: Wed, 20 Jan 93 07:55:07 EST
Organization: Princeton High School, Princeton, New Jersey

dan@cafws2.eng.uci.edu (Dan Harkless) writes:

> In article <C0yo9y.LMz@undergrad.math.waterloo.edu> cyor@mobius09.math.uwater
> >Hi!
> >
> >Just read a Mac magazine (MacWorld Feb 1993) and it mentions that
> >Motorola is working on the 68060 for the Mac which is supposed to
> >run faster than the first PowerPC.
> >
> >Anybody has more information?
> >I guess we can get 68060 accelerator card for the Mac soon....
> 
> 	And this leads me to something I've been wondering about.  Sorry this
> is so ignorant, but when you get one of these accelerator cards, what happens
> does the card become the active CPU?  Or are both used, or what?  If you put
> an 040 accelerator card into a IIci, for example, would it equal Quadra
> performance?
> 
> -----------------------------------------------------------------------------
> | Dan Harkless                | "The sore in my soul                         
> | dan@cafws1.eng.uci.edu      |  The mark in my heart  ->  Front 242,        
> | dharkles@bonnie.ics.uci.edu |  Her acid reign..."        Tragedy >For You< 
> -----------------------------------------------------------------------------

Uh, just a thought, But how much do you want to bet that ANYONE with the 
PowerPc boards has signed a VERY potent NDA?
They won't be saying anything for a while(imho)
g-man

-----
Greg Sachs, Princeton High School BBS
DNS: g-man@phsbbs.princeton.nj.us      UUCP: ...!princeton!phsbbs!g-man
Disclaimer: Author bears full responsibility for this message.
From: lreiter@jade.tufts.edu (Lowell B. Reiter)
Newsgroups: comp.sys.mac.hardware
Subject: New Mac, Especially Powerbooks
Date: 24 Jan 93 22:22:02 GMT
Organization: Tufts University - Medford, MA

I'm about to buy a mac.   I have between $2000-$2500.
Question....

There is plenty of info out their on the new Centris and Quadras, but I've heard little about the new PowerBooks.   What is coming out?

I heard there was a PowerBook 165c coming out that has a built in color screen.
Is this ture?   Are there new color duos coming out?

Are there new powerbooks coming out that can use the new 2.8 MB floppies like new IBMs have?

Is there anything coming out at all?   When?  And is there any clue to prices?
If the new PowerBooks cost $4000 then I will buy now...   If not I'll  wait.
What is happening.  I'd prefer e-mail otherwise post reponses....


--Lowell
--
***********************************************************************
* Lowell Reiter			  "I need a Vacation... Now!!! "      *
* Tufts University                                                    *
* Internet Account: lreiter@jade.tufts.edu                            *
***********************************************************************
From: tjhendry@queen.mcs.drexel.edu (Jonathan Hendry)
Newsgroups: comp.sys.mac.hardware
Subject: Re: NeXT (Was: Power PC/68060/Taligent/Windows NT)
Date: 24 Jan 93 16:58:11 GMT
Distribution: usa
Organization: Drexel University, Dept. of Math. and Comp. Sci.
X-Newsreader: Tin 1.1 PL4

trimble@ph-meter.beckman.uiuc.edu (Chris Trimble) writes:
: 
:  I think the real problem here is that NeXT computers do not offer
:     1) good software choices
:     2) good hardware.
: 
:  I'll elaborate on both of these ---
: 
:    1) Yes, some software for the NeXT blows away most other software
:       packages on other platforms. The interface for WordPerfect, for
:       example, far exceeds the interface for the program on any other
:       platform. The thing is that WordPerfect is basically the only
:       word processor to choose from. WriteNow, IMHO, doesn't offer the
:       things that are really needed in a word processor and Frame is
:       overkill. There are some softwares for the NeXT that are completely
:       unreliable compared to their other platform counterparts.
:    2) NeXT's hardware stinks. Let's face it - workstation-like tasks on
:       an '040 just doesn't cut it most of the time. When I use those things,
:       I find myself waiting a LOT more than if I use the Macs or other 
:       workstations. The Macs because the software is more streamlined and
:       the other workstations because the hardware is better.

: --
: Chris Trimble  	                 Birthday party, cheesecake, jellybeans, BOOM!
: Beckman Institute Systems Services  -   Univ. Of Illinois   -  chris1@uiuc.edu 

True, NeXT's don't have as much software as the Mac. But there are a lot of
apps on the way. I figure the number of available programs will double, if not
triple this year. Word processing is a definite problem on the NeXT. WPerfect
sucks on the NeXT. It's incredibly buggy and slow. On the other hand, we've 
got plenty of Renderman front-end programs :) 

As for hardware, it really depends on the confguration. How much memory was in
the NeXT's you've used? It should be at least 16 megs, 20 is better. Was it
net-booted? I think a lot of old NeXTcube labs are like that. (Nothing on the
local machine but a swap drive, everything else taken off a server over ether.)

My 16Meg 040 mono cube seems plenty fast. I'll buy a 586 or an HP Snake to
run NeXTSTEP if I can get the money, but this is fine, for now. Of course,
there are times when it gets bogged down, if I've been doing a lot of rendering
or something like that. That will probably go away if I pick up some more RAM.

--
Jonathan W. Hendry
Drexel University College Of Information Studies
Anderson Financial Systems "Programmer-in-Exile" :)
hendryjw@duvm.ocs.drexel.edu (No NEXTMail :( )
<set loose the marmosets!>
Newsgroups: comp.sys.mac.hardware
From: bauer@informatik.uni-ulm.de (Christian Bauer)
Subject: Re: PowerPC/060 macs
Followup-To: comp.sys.mac.hardware
Organization: University of Ulm
Date: Thu, 28 Jan 93 09:47:17 GMT

In article <1993Jan27.101814.19909@shannon.ee.wits.ac.za>, Philip Machanick
<philip@concave.cs.wits.ac.za> wrote:
> 
> In article <1993Jan24.203055.6247@netcom.com> Ray Fischer, ray@netcom.com
> writes:
> >Yes, a 300DPI 19" color monitor would be really nice.  But I personally
> >would rather use the money to buy a house.
> 
> I doubt much more than 100dpi would make a difference - provided
> you can use as many colours as you need.
> 

I've just seen such beasts with 200 to 300 dpi for prepressing or technical
datas. more the 300 dpi greyscale monitors seem to be overkill, but for
specific datas like x-ray images it can be necessairy to do 300 DPI
with 16 (12) Bit greyscale resolution to detect very fine structures,
fractures or things like that. But as long as such Monitors are
like Prototypes, the prices are much to high!

Christian Bauer

bauer@informatik.uni-ulm.de
From: hades@coos.dartmouth.edu (Brian Hughes)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Quick question about PB160 RAM
Date: 26 Jan 93 15:05:43 GMT
Reply-To: hades@Dartmouth.Edu
Organization: Dartmouth College, Hanover, NH
Disclaimer: Personally, I really don't care who you think I speak for.
Moderator: Rec.Arts.Comics.Info

pino@gammow.berkeley.edu.CosmicSuns (Jose L. Pino,,,) writes:

>Powerbook:  160,180,210 & 230s all come with 4MB ram on the board.  They
>do not ship with memory cards installed.   I just ordered memory from
>Technology Works in Texas.  They ship (and I think most mail order companies)
>the memory with the tools and instructions to install it yourself.  At least
>with the 230 duo, apple allows the user to install the memory without
>invalidating the warrenty.

    They do? Since when? The only thing that Apple has ever let the user
install is the PDS/NuBus adaptor for the IIsi. You weren't even able to
install the expansion card once you had installed the adaptor. Nothing
that might be in danger from a static discharge is "officially"
installable by a non-lisenced Apple Tech. And since you can't open the
normal Powerbooks without voiding the warranty you can bet your life
that Apple won't allow you to open the ultra-new ultra-small Duos.

-Hades
--
From: erics@infoserv.com (Eric S. Smith)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Motorola's 68060 for the Mac
Date: Fri, 22 Jan 93 08:40:04 PDT
Organization: Reigning Cats and Dogs
Reply-To: erics@infoserv.com
X-Mailer: uAccess - Macintosh Release: 1.6v1


cvadsgvo@vmsb.is.csupomona.edu writes:

> the only use of mmu is virtual memory, so it is true that 68000 machine can't
> use virtual memory.

But it's more than that. The 68000 is not capable of virtual memory,
even with an external MMU. The 68010 was the first of the series that
was capable of VM, and that required an external MMU.

Also, it's not true that the only use of an MMU is virtual memory. An
MMU does address translation, and that permits an application to be
"scatter-loaded" into memory, i.e. loaded non-contiguously. Thus an
external MMU can be used effectively with chips like the 68000 and the
8086, even though virtual memory is not possible for these chips.

> that does not mean there is any affect on the performance.
> 286 can't use virtual memory either. i could be wrong.

I believe you are wrong. I believe the 286 has an on-chip MMU, and does
support virtual memory.

-----
Eric Smith
erics@infoserv.com
CI$: 70262,3610


Newsgroups: comp.sys.mac.hardware
From: dholmes@netcom.com (Dennis Holmes)
Subject: Re: Mac IIsi sound problems
Organization: Netcom - Online Communication Services  (408 241-9760 guest) 
Date: Thu, 28 Jan 1993 02:26:42 GMT

dave@yggdrasil.NoSubdomain.NoDomain (David Lee Matuszek) writes:

>In article <1993Jan26.160639.1106@speedy.aero.org>, jrg@punch (James R. Goble)
>writes:

>|> I hate to suggest this, but buying the external speakers is probably the  
>|> best way to go.  If you don't have many bucks (And who does), Sony sells  
>|> some little speakers for Walkmans for about $10.  

>Let me recommend AGAINST these speakers.  The quality may be fine (I'm no
>audiophile, they sound OK to me), but the volume is very low.  Sound level 7
>through the speakers is approximately the same as sound level 1 through the
>Mac's internal speaker (when the latter happens to work, that is!).

>Does anyone know if the external speaker jack somehow gets less power than the
>internal speaker?  If it does not, then perhaps someone can recommend a (cheap)
>speaker or pair of speakers that will produce reasonable volume?

>I'd be willing to go with a powered speaker if I could find one that is really
>cheap (under $30) and uses AC.  My experience with battery-powered speakers is
>that they use up the batteries overnight--no one in my house (including me)
>would ever remember to turn them off.

I have a pair of Labtec SS-100's that I got at Target for around $20.  You
can now find them at most computer/software stores, and now they come in
gray to match your machine.  Each speaker case is about 5" high, and each
speaker has volume control, bass boost button, and treble boost switch.
They are amplified and use either batteries or AC power (adapter not
included, but usually available from same place).  I keep both boosts on,
and they're certainly no Boses, but I am quite satisfied.

I would not go with any sound-activated speakers like the Minimus-0.6 from
Radio Shack.  They may be fine for music, but the computer doesn't make
sound constantly (well, mine doesn't :), and so the speaker tends to clip
the beginning of each sound.  I also wouldn't go with any non-amplified
speakers, because the sound level will tend to be too low.  The guy at Radio
Shack tried to recommend Minimus-3.5's, not understanding why anyone would
need amplified speakers to plug into a headphone jack.  Well, duh, there
isn't much that puts out less power than a headphone jack, so what else are
amplified speakers for?  Anyway, these types (non-amps) also usually don't
come with a 1/8" plug, so you'd have to attach one yourself.  If you look at
non-amplified speakers, make the salesperson demonstrate them first.
-- 
+-------------------------------------------------------------------------+
| Dennis Holmes                      dholmes@netcom.com                   |
| San Jose, CA                       Disclaimer:  I'm temporarily insane. |
+------=>{ Meanwhile, as Ford said: "Where are my potato chips?" }<=------+
Newsgroups: comp.sys.mac.hardware
From: fosterr@silver.ucs.indiana.edu (Raymond W. Foster)
Subject: Re: SE/30 discontinued
Organization: Indiana University
Date: Sat, 23 Jan 1993 19:37:50 GMT

In article <1993Jan11.232003.1937@cu23.crl.aecl.ca> BassoR@crl.aecl.ca writes:
>I've heard from our Apple Dealer that the SE/30 upgrade has been officially
>discontinued in Canada. Has anyone else heard the same?

It was discontinued in the US several months ago.

Ray Foster
Indiana University
Bloomington IN USA
Newsgroups: comp.sys.mac.hardware
From: aaron@noproblem.uchicago.edu (Aaron L. Bratcher)
Subject: mac microkernel
Followup-To: comp.sys.mac.hardware
Organization: University of Chicago
Date: Wed, 27 Jan 1993 13:38:06 GMT


Is there anyone from Apple that can tell us what the status of the
mircokernel for the mac is? Will it work on my current mac with System 7?
Is the threads product still supported? Will threading on the microkernel
use the same functions as the threads package?

Lots of questions from mac die-hards.

Any news would be greatly appreciated. Thanks.
From: HF.PEC@forsythe.stanford.edu (Doug Peckler)
Newsgroups: comp.sys.mac.hardware
Subject: new IIsi kerplunk?
Date: 21 Jan 1993 11:44:14 -0800
Organization: Stanford University
NNTP-Posting-Host: morrow.stanford.edu

I have some concerns about the new IIsi that i got last week.   It
came with a very light version of Hypercard called Hypercard Player,
which I gather is supposed to inspire people to buy the Hypercard
Development software.  Anyway I was trying to use the 'magic'
command that someone said allows one to develop stacks without buyng
the software.  I never succeeded but did succeed in having the
computer freeze up while in the application.  There are no reset
buttons on this Mac.  Doing command-control-shift-escape  didn't  do
anything.  I had no choice but to turn off the power.
Since then i've noticed that when I turn on the computer, it whirrs
and then makes a very audible 'kerplunk' sound before starting up.
Another IIsi I have access to doesn't do this.   Also, I installed
Word 5.1a.  I notice the balloon help for Word is very slow,and so
is deleting after selecting text.

I'd love any suggestions or diagnoses.  Did turning  the  power  off
injure  the computer?  Should I contact Apple?

P.S.  The Mac came with system 7.1. and this is the 5 mb ram
configuration.  Also the bookstore wasn't able  to  get  the  80  mb
drive  that  came  with  the  bundle  offer, so I was given a 160 mb
drive, which  delights  me,  especially  if  i  can  fix  the  above
problems.

PPS.  Am I posting to the right newsgroup?
Thanks a lot.
Newsgroups: comp.sys.mac.hardware
From: Quinn <quinn@cs.uwa.edu.au>
Subject: Re: Motorola's 68060 for the Mac
X-Xxdate: Fri, 22 Jan 93 05: 38:36 GMT
Organization: The University of Western Australia
X-Useragent: Nuntius v1.1.1d13
Date: Fri, 22 Jan 1993 05:41:41 GMT

In article <1993Jan21.141259.6424@bilpin.co.uk> Mark Allerton,
mark@bilpin.co.uk writes:
>My understanding is that the PowerPC is in fact a 32-bit CPU, with 
>32-bit registers, that can be scaled up to 64 bits, and that in a 
>64-bit version (*not* the 601) then programs could switch between 
>32-bit mode (the default, most likely) and 64-bit mode. This 
>switching will be available as a user (rather than supervisor) mode 
>instruction.

Bletch!

Quinn "The Eskimo!"      <quinn@cs.uwa.edu.au>     "Support HAVOC!"
Department of Computer Science, The University of Western Australia
  -- Oh no, more quote than text.  I'd better add a long signature! (-;
From: zuber@elde1.epfl.ch
Newsgroups: comp.sys.mac.hardware
Subject: Q:Mac IIsi oscillo. upgrade.
Date: 22 Jan 93 15:34:15 GMT
Organization: Ecole Polytechnique Federale de Lausanne

I am very interested in upgrading my Macintosh IIsi to 25MHz. My Mac is equiped
with a DayStar FastCache IIsi (i.e.: DualPort with 68882 and 64K cache). Has
any FastCache IIsi user done this upgrade? Or has anyone with a similar type of
card tried the upgrade? If not, what implications on the cards functioning
could the oscillator change could there be.

Thanks
Arnaud Zuber
From: aris@psssun (Aris Gerakis)
Newsgroups: comp.sys.mac.hardware
Subject: Powerbook 140 2MB memory to sell/exchange
Date: 21 Jan 1993 06:07:13 GMT
Organization: Michigan State University
NNTP-Posting-Host: psssun.pss.msu.edu
Summary: Sell/exchange 2MB powerbook 140 memory
Keywords: powerbook, memory, upgrade

 need to sell or exchange the 2MB memory card for the Powerbook 140.  I need
a card with more memory, probably the 6MB upgrade.  
Anbody interested pls. write.
From: altern8@bbs.draco.bison.mb.ca (Klaus)
Newsgroups: comp.sys.mac.hardware
Subject: FULL PAGE DISPLAYS FOR CLASSIC II'S
Date: Fri, 22 Jan 1993 17:18:12 GMT
Organization: The Draco Unix System [BBS]

Is there such a beast? Anyone got anything good/bad to say about a 
particular product?


---
altern8@bbs.draco.bison.mb.ca (Klaus)
The Draco Unix System [BBS]

Newsgroups: comp.sys.mac.hardware