HDTenEightyP/NetNews huggingface dataset:
From: hpoppe@ncar.ucar.edu (Herb Poppe)
Newsgroups: comp.sys.mac.hardware,comp.sys.mac.programmer
Subject: Re: Serial Port Programming
Date: 15 Apr 92 16:12:49 GMT
Organization: National Center for Atmospheric Research

In article <73763@netnews.upenn.edu> green@eniac.seas.upenn.edu (Bradley 
Green ) writes:

> I'm trying to run a distributed processing network, using a Mac as the 
> master controller, with dedicated microcontrollers at the oother nodes
> of the network.  What I want to do is to be able to run the Mac serial
> port at its maximum asynchronous speed, which I believe is 230Kbaud, but
> I haven't found any real info on how to program the serial port to do
> this.  Note that I don't want to use AppleTalk protocols, but just to
> send data byte-by-byte.

The Mac's serial driver (software) is limited to a maximum speed of 
57.6KB. According to the conventional wisdom, this is the maximum speed 
that Apple could achieve with an interrupt driven driver on the original 
Mac. Note that the 230KB AppleTalk drivers are not event driven. It is 
probably the case that Macs like the IIsi, etc. could support higher 
interrupt driven baud rates, but the current serial driver has no 
mechanism for specifying a baud rate higher than 57.6KB.

You will have to write you own driver if you want to run at higher baud 
rates. This means you will have to get the technical details on the Zilog 
SCC.

Suppose you decide to live with the 57.6KB limit and use the Apple serial 
driver. Depending on how you wire your network, there may be another 
consideration that may not be handled by the current serial driver. Are 
you using RS-485 transcievers like the SN75176 with your microcontrollers; 
that is, is your network a single twisted pair? If so, then only one 
RS-485 driver on the network can be enabled at any one time. This includes 
the driver in the Mac. I do not know if the Mac serial driver always 
enables the driver before each transmission and then disables it at the 
end of transmission, or whether it enables the driver at open and disables 
it at close, or whether it is always enabled. You can get around this 
problem by using two twisted pair and separate RS-485 drivers and 
receivers with your micros. The Mac's driver would be wired to all the 
micros' receivers and the micros' drivers would all be wired to the Mac's 
receiver. Then it would not be an issue if the Mac's driver were always 
enabled.

At some point in the future, I plan to implement a network like the one 
you mention. For me, the 57.6KB limit is not a problem, but I will need to 
know how the Mac serial driver handles enabling/disabling the RS-422 
driver. If anyone can answer that question, I'd like to know.

If you decide you need to write your own driver, I seem to recall that at 
one time Apple made the source code of a (maybe not THE) serial driver 
available. If I remember correctly, does anyone remember how to get this 
code?

Herb Poppe             hpoppe@ncar.ucar.edu
NCAR                      (303) 497-1296
1850 Table Mesa Dr.
Boulder, CO  80307-3000
From: makarewy@jalapeno.ucdavis.edu (Alex Makarewycz)
Newsgroups: comp.sys.mac.hardware
Subject: PageMaker 4.2 and Freehand 3.1 FORSALE!!!!!!!!!!!!!!!!!!
Date: 6 Apr 92 17:08:13 GMT
Organization: College of Engineering - University of California - Davis

Hello!

	 I have brand new software for sale!!!!!
Aldus PageMaker 4.2 ---->   $350

Aldus Freehand 3.1  ---->   $250



First offer gets it.  I will ship them to you overnight C.O.D.  You pay
shipping.

Alex
makarewy@quesadilla.ucdavis.edu
From: jhgillespie@ucdavis.edu (John Gillespie)
Newsgroups: comp.sys.mac.hardware
Subject: Apple 16" Monitor jiggle
Date: 9 Apr 92 21:59:35 GMT
Article-I.D.: ucdavis.12107
Organization: Center for Population Biology, UCD

We have a problem:  Three 16" monitors, two jiggle a lot, one is
rock solid.  We've hooked all three to the same IIci, oriented them
in serveral directions--all the obvious stuff--and still the problem.

Has anyone else has and solved the problem of jiggle on 16" monitors?

What really makes it wierd is that sometimes the jiggle disappears, but
only for a short time.  (We have verified the above in three separate
locations.)
Xref: sparky comp.sys.mac.hardware:9161 comp.sys.mac.system:7149 comp.sys.mac.misc:9119
From: mg4s+@andrew.cmu.edu (Marissa Gonzalez)
Newsgroups: comp.sys.mac.hardware,comp.sys.mac.system,comp.sys.mac.misc
Subject: HELP! (mac hardware expert)
Date: 14 Apr 92 16:23:43 GMT
Organization: Masters student, Information Networking Institute, Carnegie Mellon, Pittsburgh, PA

I am doing an analysis of the different Mac's and I desperately need
some information concerning some system specs.  I've had a hard time
finding answers to the following questions.  If you know the answers to
the following questions, the info would be the greatly appreciated;
please let me know which Mac(s) your information applies to.  I need
Quadra info as well.


1. Is the system bus/ processor bus (not the NuBus) synchronous 
	or asynchronous?  

2. What is the speed of this bus (the max data transfer rate) ?
	With a IIsi running at 20 MHz I think at most one read/write 
	can occur every 100 nS (10 MHz) - is this true?

3. What is the data transfer rate of the 1.4MB Mac floppy drive?

4. How fast does the Apple Desktop Bus (ADB) run?


Thanks,

Marissa Gonzalez <mg4s@andrew.cmu.edu>
Information Networking Institute
Carnegie-Mellon University
From: ennui@trauma.com (N is for Neville who died of ennui)
Newsgroups: comp.sys.mac.hardware
Subject: Re: 16" monitors
Date: 11 Apr 92 20:06:13 GMT
Article-I.D.: bostraum.D2150026.azmhfx
Reply-To: ennui@trauma.com (N is for Neville who died of ennui)
Distribution: world
Organization: We Be Trauma, Boston MA USA
X-Mailer: uAccess - Mac Release: 1.5v2


In article <1992Apr10.200954.6275@dartvax.dartmouth.edu>, hades@coos.dartmouth.edu (Hades) writes:
> eriks@lin.foa.se (Erik Svensson FOA2) writes:
> 
> >I'm in the market for a new 16" color screen and I have pretty much narrowed 
> >the choice down to between Apple's 16" monitor together with a 8.24 card or a
> >NEC 3FG 15" with a Xceed ColorII card. My problem is, which one ? 
> 
>     The 3FG is 14" not 15", and is really only useful as a 640x480
> resolution monitor. If you are looking to compare a NEC monitor to the
> Apple 16" then you need to talk about the NEC monitor that can effectily
> give you 832x624 like tehe Apple does. This monitor is the 5FG and it is
> 15". There is also the 6FG which is 17", but which NEC bills as their 2
> page monitor.

I must correct you on this. The 5FG is a 17" with a 16" displayable area.
and the 6FG is a 20" with a 19" displayable area. Actually now that I said
this it's not entirely acurate because both of these monitors offer a mode
that allows full screen veiwing without any margins.

> >Is the NEC a good screen? Is the Apple 16" a good screen? Which one is best?
> 
>     The Apple 16" uses the Sony Trinitron picture tube, considered by
> many to be the best picture tube on the market, and it is a very nice
> monitor (in fact I'm typing this message on my Apple 16"). NEC uses
> their own picture tube in their Multi-Sync monitors, and while I have
> heard very good things about them, it has been mostly in regards to
> pricing, and I have never actually seen one.

I have never seen the NEC's but they are supposed to have been totally redesigned.
I am using a Sony CPD-1604S which has the same tube that the apple does except
that it has multiple resolution capabilities and is about $500 dollars less.
Yes, I know it doesn't have ADB and sound Ports.

David

--
David C. Spiegelman             for information send mail to: info@trauma.com
Internet: ennui@trauma.com               UUCP: ...!spdcc!iecc!bostrauma!ennui

      "A long memory is the most radical idea in America." - C. Sparks
Newsgroups: comp.sys.mac.hardware
From: smd@media.mit.edu (Steven Drucker)
Subject: Yet another monitor inquiry.... (Sony 1304,1304s and NEC 3FGX,4FG) (?)
Organization: Media Lab
Distribution: na
Date: Tue, 7 Apr 1992 07:34:17 GMT

Can anyone supply some info on how good these Sony and NEC monitors are?
How do they compare to the perennial Apple 13" RGB?  What are good prices
for them?  Is it worth getting a 15" NEC over the 13" RGB? Even if they're
about the same price?

Thanks!
--Steven Drucker
Xref: sparky comp.sys.mac.hardware:8958 comp.sys.mac.misc:8899
From: am3f+@andrew.cmu.edu (Alex S. Margita)
Newsgroups: comp.sys.mac.hardware,comp.sys.mac.misc
Subject: Expansion board
Date: 9 Apr 92 16:34:24 GMT
Article-I.D.: andrew.Qdt78Eq00WDGMQ_0B=
Organization: Comp & Comm - Computer Operations, Carnegie Mellon, Pittsburgh, PA

Perhaps someone can answer a question for me.  I purchased a used Mac
SE/30 & ran a neat piece of software against it called "HELP" .  On a
printout it gave me configuration information about the Mac.  One of the
items mentioned was that it had an expansion card in it.  A Macintosh
SE/30 internal Video, made by Apple computer in slot 14, board ID of 12.
 Part number of 341-0650.

Can someone enlighten me as to what the card does???  

Thanx for any info,

AL
From: fleming@cup.portal.com (Stephen R Fleming)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Apple 21" greyscale equivalent
Date: 9 Apr 92 00:55:03 GMT
Distribution: na
Organization: The Portal System (TM)




I have the SuperMac 19" Platinum greyscale on my home machine, and the
Radius 19" greyscale at work.  Both are excellent and seem to be priced
within a couple hundred dollars of each other.  I think you'd be happy
with whichever you found the better deal on.  (I spend about 12 hours a
day in front of one or the other, and I'm PICKY).

Little bits:  the Radius shows more pixels, so they're smaller (about
80 dpi instead of 72, I think).  That's personal preference.  The
Radius includes more software gimcracks, but I've turned all mine off. 
The SuperMac has a nice pan-and-zoom, and a great 2X mode that the
Radius lacks (wonderful for bit-painting in HyperCard).  My SuperMac
has developed an annoying flicker (sudden change of brightness about
once every five minutes), but I think that may be my overloaded power
lines.

I like them both.  They're worth the extra money compared to the
cheapies -- you only have one set of eyes!

+----------------------------------------------------------------+
| Stephen Fleming          |  Internet: fleming@cup.portal.com   |
| Director, Strategic Mktg.|  CI$: 76354,3176    AOL: SFleming   |
| Northern Telecom         |  BIX: SRFleming     X.500:  ???     |
| 200 Athens Way           +-------------------------------------|
| Nashville, Tenn.  37228  |    Opinions expressed do not        |
| FAX: (615) 734-5116      |    represent Northern Telecom.      |
+----------------------------------------------------------------+

OM 



 Courier
Organization: Central Michigan University
Date: Wednesday, 15 Apr 1992 17:03:36 EDT
From: Mark Strandskov <34HLEFG@CMUVM.CSV.CMICH.EDU>
Newsgroups: comp.sys.mac.hardware
Subject: Remote boot chip for Mac?

Does anyone out there know if anyone has created a remote boot chip
for the Macintosh?  A while back, I thought someone had posted that
a company called Mausworks or something like that had created one
which would work with Asante cards.  Great, other than I can't seem
to find the company, if it exists, and no one seems to know if such
a beast has been developed for the Mac.  I would appreciate any and
all feedback on this.

Thanks,

Mark...
From: elon@phsbbs.princeton.nj.us (Elon Danziger)
Newsgroups: comp.sys.mac.hardware
Subject: Low Voltage or a Damaged Hard Drive?
Date: Fri, 10 Apr 92 23:13:29 EDT
Organization: Princeton High School, Princeton, New Jersey

I have a Fujitsu 45 MB external drive (from MacDirect), and I'm having 
problems with it.  Every once in a while, it will restart--I'll hear the 
sounds associated with startup, and if it's running an application, the 
system will hang.  Is this a problem with the hard drive, or is the 
electric company sending low voltages occasionally, to which this hard 
drive is particularly sensitive?  I've noticed about twice that at the 
same time the hard drive restarted, the lights in my room dimmed 
slightly.  Remedies, of course, are also welcome.

Thanks!

-Elon

Elon Danziger, Technical SysOp PHSBBS            Princeton High School
DNS: elon@phsbbs.princeton.nj.us      UUCP: ...!princeton!phsbbs!elon
US Mail: 17 Chestnut Street / Princeton, NJ 08542
DISCLAIMER: Author bears full responsibility for this message.
Newsgroups: comp.sys.mac.hardware
From: ckyu@leland.Stanford.EDU (Chen-Kuang Yu)
Subject: keypad on Powerbook
Keywords: powerbook
Organization: DSG, Stanford University, CA 94305, USA
Date: Sat, 11 Apr 92 02:18:41 GMT

Does any of you know how to simulate keypad keys (eg. PgUp and PgDn) on the
powerbooks?

Thanks in advance.


/Chen Yu

Newsgroups: comp.sys.mac.hardware
From: gilbertd@sunflower.bio.indiana.edu (Don Gilbert)
Subject: Re: Asante MC3IIsi + Mac SE/30 = problems? YES!
Organization: Biology, Indiana University - Bloomington
Date: Wed, 15 Apr 92 15:51:58 GMT

In article <1992Apr13.212030.9319@bronze.ucs.indiana.edu> gilbertd@sunflower.bio.indiana.edu (Don Gilbert) writes:
>
>I am trying to trace the cause of a random but persistant failure
>in a Mac SE/30.  The problem started when an ethernet card was
>installed, an Asante model MC3 IIsi (a newer asante model that
>has thick, thin & 10baseT connectors, which fits both Mac 2si
>and Mac SE/30).  This card was returned and replaced with
>the same model and the problem persists.  We have tried various
>software solutions/upgrades to no effect.  I have no personal
>experience w/ this Mac + ethernet card combination.  I've
>used many of the Asante cards (> 150) of various models with
>nothing but good results.  I've used the Asante model MacCon+
>for the SE/30 in other SE/30s without problem, and I have had the 
>model MC3 IIsi installed in some Mac IIsi without problem.
>
>Question for the day:  does anyone else find problems with the
>MC3IIsi card in Mac SE/30 computers?

To answer my own question, we put *three* Asante model MacCon3 IIsi
cards into *two* different Mac SE/30 computers and had the same
sporadic freezing problem (the problem is fairly reproducible when
you transfer multi-megabytes of data over ethertalk; by the way,
Asante does advertise the MacCon3 as compatible with Mac SE/30).

I found that a Mac SE/30 using the earlier MacCon+ 30i ethernet card
from Asante will fail when given the MacCon3 IIsi card.  And the
Mac SE/30 which failed with any of three MacCon3 IIsi cards is fine with 
the MacCon+ 30i card.   I realize the sample size here is small, but the
problem is reproducible enough for me to recommend that no one use
the MacCon3 IIsi card in a mac SE/30 unless/until Asante clears
up the problem.   It may be software solvable, I don't know.  I am
waiting for Asante tech support to return my phone call.

I have no hesitancy to recommend the MacCon3 IIsi card for Mac IIsi models,
where it has worked fine for me. Also the MacCon+ 30iET, MacCon+ 30iE
in various configurations work fine in Mac SE/30s.  My only quibble
with these is that you have to choose between Thinwire OR 10baseT,
where the MacCon3 gives you both connectors for a few dollars more.

-- Don

-- 
Don Gilbert                                     gilbert@bio.indiana.edu
biocomputing office, biology dept., indiana univ., bloomington, in 47405
Xref: sparky comp.sys.mac.hardware:9218 comp.lang.functional:489 comp.lang.scheme:1203
From: hhalkin@math74.ucsd.edu (Hubert Halkin)
Newsgroups: comp.sys.mac.hardware,comp.lang.functional,comp.lang.scheme
Subject: Mathematica and Scheme put Powerbook170 to sleep
Keywords: Mathematica,Scheme,PowerBook170
Date: 15 Apr 92 21:29:41 GMT
Followup-To: poster

When I evaluate

Table[Print[(Sum[n^3,{n,285}];i)],{i,10000}];

on a PowerBook170 in Mathematica(Enhanced Version 2.0) the numbers
1 2 3 4 .. are printed on the screen at the approximative rate 
of one number per second, until the number 19 or 20. At that point
the output ceases and is resumed whenever I massage the trackball.

I have observed the same behavior on a second PowerBook170.

I tried the same thing on a PowerBook100, on a PowerBook140 and
on an SE30, but I have not observed anything unusual.

Similar problems in MacScheme(Student Edition 3.0) and in
ISETL 2.0 create similar behavior on the 2 PowerBook170's.

Note: the PowerBook170's can be wakened up not only by
massaging the trackball, but also by clicking, key pressing,
disk activity etc.

If you use Mathematica, MacScheme or ISETL on a PowerBook170,
let me know if you encounter the same behavior.

Hubert Halkin.     hhalkin@ucsd.edu



Newsgroups: comp.sys.mac.hardware
From: heyes@dadev.cebaf.gov (Graham Heyes)
Subject: WHat is Cheapest Personal LW SC upgrade..?
Reply-To: heyes@dadev.cebaf.gov (Graham Heyes)
Organization: CEBAF (Continuous Electron Beam Accelerator Facility)
Date: Thu, 16 Apr 1992 18:31:43 GMT

The subject line says it all really. 

I have a personal Laserwriter SC (bitmap only, interfaced via SCSI) printer 
which I would like for various reasons to upgrade to a postscript printer 
with a serial, rather than SCSI interface.

	What is the cheapest upgrade?
	Where is the best place to get it from?
	Has anyone had any experience with upgrading an SC?

thanks in advance,

	Graham Heyes.

-------------------------------------------------------------------------------
	Graham Heyes					CEBAF
							Physics Division MS 12H
Internet: heyes@dadev.cebaf.gov			        12000 Jefferson Ave
DECnet  : dadev::heyes, cebaf::heyes			Newport News VA 23606
BITNET  : heyes@cebaf					Tel: (804) 249-7030
From: aethred@csa1.lbl.gov (MR EPSTEIN)
Newsgroups: comp.sys.mac.hardware
Subject: Mac II si speed: cache or video board?
Date: 8 Apr 92 04:34:16 GMT
Article-I.D.: dog.22567
Reply-To: aethred@csa1.lbl.gov
Organization: Lawrence Berkeley Laboratory - Berkeley, CA, USA
NNTP-Posting-Host: 128.3.254.196
News-Software: VAX/VMS VNEWS 1.3-4

Hi,
	I just bought a Mac II si and I was thinking getting one of these
cache boards with math coprocessor (AE quicksilver, DayStar, etc) with FPU 
to speed up the machine a bit and still have a PDS slot for futere expansion. 
Now a friend of mine is offering me (for a very good price) an Apple Video
Board 8*24, which being a NuBus board would not fit in the PDS slot.
Now the questions are:

a) Is a Mac II si going faster using a cache card or a dedicated video board?
(some test on MacUser show that the si is really penalized running color from 
the on board video circuity)

b) Is there any cache card with FPU that has NuBus slot instead of PDS one?

					Ciao, Michele
From: afry@uhura.cc.rochester.edu (Alan R. Fry)
Newsgroups: comp.sys.mac.hardware
Subject: Re: Video card and accelerator , Both (was SE/30 video cards)
Date: 13 Apr 92 02:56:18 GMT
Organization: University of Rochester (Rochester, NY)

In article <1992Apr13.013305.2246@acsu.buffalo.edu> yaosenko@acsu.buffalo.edu (Yaosen Ko) writes:
>I need both color video card and 68040 accelerator for my SE/30.
>But only one PDS is available.
>
>Anybody has any good idea?


Yeah, buy the Magellan 040 from Total Systems (800 874 2288), and they'll
sell you a double-slot adapter for about $150.  I think the Magellan 040 is
around $3000, but they may still have their lower 'expo' price ($2400).

Cheers,

Alan
--
------------------------------------------------------------------------------
  Alan R Fry                   |   Latest surveys show that 3 out of 4 people
  afry@uhura.cc.rochester.edu  |   belong to 75% of the population.
------------------------------------------------------------------------------
From: nobody@bcm.tmc.edu (BCM User)
Newsgroups: comp.sys.mac.hardware
Subject: Re: powerbook modem use in Europe
Date: 13 Apr 1992 19:00:24 GMT
Organization: Baylor College of Medicine, Houston, Tx

I wasn't able to use the PowerBook 170 fax-modem in Italy and I could not 
find any solution (also in the pulse mode the fax-modem cannot detect the 
dial tone).  Does anybody have solved this problem?  Is it possible to 
change the initialization string in the fax software in order to ignore 
the presence of the dial tone?  How can I force the modem to dial anyway?

Giuseppe
Baylor College of Medicine
gborsani@bcm.tmc.edu
Newsgroups: comp.sys.mac.hardware
From: sgrenander@nasamail.jpl.nasa.gov (Sven Grenander)
Subject: Re: Use of IIfx terminator on Quadra 900
Organization: Jet Propulsion Laboratory
Date: Tue, 7 Apr 1992 20:22:58 GMT

In article <614@jagubox.gsfc.nasa.gov>, jim@jagubox.gsfc.nasa.gov (Jim Jagielski) writes:
> 
> Can one use the black "glitch absorbing" IIfx terminator on the Quadra 900?
> 
> 
> -- 
> ==============================================================================
> #include <std/disclaimer.h>
> 
>                 Jim Jagielski                  NASA/GSFC, Code 711.4
>           jim@jagubox.gsfc.nasa.gov             Greenbelt, MD 20771
> 
>        "If we took the bones out, it wouldn't be crunchy now would it?"
> 
> 

Not an answer (sorry) but a related question: How dangerous (H/W & data) is
it to use a II terminator on a II fx ? (I wouldn't except my CMS Platinum 600
won't run without its internal II-termination installed !*%&!!).

-Sven
From: duane@blacks.jpl.nasa.gov (Duane Clark)
Newsgroups: comp.sys.mac.hardware
Subject: Apple EtherTalk card upgrading?
Keywords: Apple EtherTalk
Date: 14 Apr 92 15:29:42 GMT
Organization: Image Analysis Systems Group, JPL

I have an old (I guess 4 years is old) Apple EtherTalk card and
want to upgrade for system 7 compatibilty. What would be ideal
is being able to ftp a hex file for the onboard EPROM, plus
the new system software. Does Apple provide this, or are they
going to try to charge for it?
From: jhgillespie@ucdavis.edu (John Gillespie)
Newsgroups: comp.sys.mac.hardware
Subject: Re: 16" monitors
Date: 10 Apr 92 17:23:54 GMT
Organization: Center for Population Biology, UCD

In article <1992Apr8.134413.29902@lin.foa.se>, eriks@lin.foa.se (Erik Svensson FOA2) writes:
> Is the NEC a good screen? Is the Apple 16" a good screen? Which one is best?
> 
As I posted yesterday, 2 of 3 Apple 16" Monitors that we purchased have
such extreme jitter that they are unusable.  There is something
seriously wrong with Apple's monitors.  On one we have replaced both
circuit boards but to no avail.  The tube is next!  If you do purchase an
Apple 16" monitor, check it out at the store before accepting it.

Newsgroups: comp.sys.mac.hardware
From: kevin@crash.cts.com (Kevin Hill)
Subject: Xceed 30 with MacScan Ultra Anyone have this?
Reply-To: kevin@crash.cts.com (Kevin Hill)
Organization: Crash TimeSharing, El Cajon, CA
Date: Fri, 10 Apr 1992 06:02:09 GMT

  Does anyone have the Micron Xceed 30 and the MacScan Ultra.  Does it work, how does it work.  If you have the MacScan Ultra, tell me about it!  

 -Kevin
From: ldo@waikato.ac.nz (Lawrence D'Oliveiro, Waikato University)
Newsgroups: comp.sys.mac.hardware
Subject: Re: PowerBook through Airline Security?
Date: 7 Apr 92 05:26:39 GMT
Organization: University of Waikato, Hamilton, New Zealand

In article <ZJ7GB9Z@cc.swarthmore.edu>, wall@cc.swarthmore.edu (Matthew Wall) writes:
> how hard would it be to put a bomb inside a working computer?

I just had another thought--what if you crashed your Mac while showing
it to the security people?

Just imagine what they would make of that *bomb* icon coming up...

Lawrence D'Oliveiro                       fone: +64-7-856-2889
Computer Services Dept                     fax: +64-7-838-4066
University of Waikato            electric mail: ldo@waikato.ac.nz
Hamilton, New Zealand    37^ 47' 26" S, 175^ 19' 7" E, GMT+13:00