Info-Mac-Request@SUMEX-AIM.STANFORD.EDU (The Moderators) (06/14/90)
Info-Mac Digest Wed, 13 Jun 90 Volume 8 : Issue 116
Today's Topics:
256 k chip reused?
AlisaShare Performance
converting BarneyScan
DiskCopy on 1MB Macs
DON'T USE FASTBACK II !!!
FASTBACK II
Fingerprints
Info-Mac Digest V8 #112
Learning to type
Lists in Think C 4.0
looking for HyBase experiences ?
Need 3270 emulation
Need help using serial ports
Old CD-ROM Drive: Is LODOWN still alive?
Printing
Queries about Vital Lasertype Inc.
Retro.SCSI INIT puzzle
Sad Mac codes
Sharp IQ 7000
SIMMs from UK at reasonable prices (forwarded mail).
SpInside Macintosh
Summary - failing Mac Plus power supplies
Three into two can go
virus infected program request
Your Info-Mac Moderators are Bill Lipa, Lance Nakata, and Jon Pugh.
The Info-Mac archives are available (by using FTP, account anonymous,
any password) in the info-mac directory on sumex-aim.stanford.edu
[36.44.0.6]. Help files are in /info-mac/help. Indices are in
/info-mac/help/recent-files.txt and /info-mac/help/all-files.txt.
Please send articles and binaries to info-mac@sumex-aim.stanford.edu.
Send administrative mail to info-mac-request@sumex-aim.stanford.edu.
----------------------------------------------------------------------
Date: Fri, 8 Jun 90 22:39:36 EDT
From: wang@pennmess.physics.upenn.edu ( Huangxin Wang)
Subject: 256 k chip reused?
Hi, netters,
Do anyone know how to re-use the 256 k chips taken out when they
are replaced by the 1M chips (I mean re-use them back into the Plus)?
I know sometime ago there is a kind of "bridge" which increase the number
of RAM slots available on the Plus, thus you can plug in more than 4 SIMMs.
Where can I get this? Is this so expensive that nowadays, people just
simply discard the 256 k? (512 Mac is getting hard to find now...)
Huangxin Wang of University of Pennsylvania
------------------------------
Date: Mon, 11 Jun 90 17:16:23 EDT
From: Peter Furmonavicius <PETER%YALEVM.BITNET@forsythe.stanford.edu>
Subject: AlisaShare Performance
Hello.
Are there folks out there that have large AlisaShare File Servers running?
We have put up an AlisaShare server and it seems like it is running slow.
I was wondering if anyone else had experiences that were similar or different.
Should AlisaShare performance be comparable to a Mac AppleShare File Server?
Thanks for any info on this topic.
[ Yale University Computer Center ] Peter Furmonavicius
[ 175 Whitney Avenue ] Senior Research Programmer
[ P.O. Box 2112 ] ~ Macintosh :-)
[ New Haven, CT 06520 ] (203) 432-6600
------------------------------
Date: Sun, 10 Jun 90 22:54:45 edt
From: lz@idis.lis.pitt.edu (gsa-eed linda zirnitis)
Subject: converting BarneyScan
I'm wondering if anyone has any information regarding converting
BarneyScan 2.0x native color format (24-bit) to 8-bit Sun
Rasterfile format?? (color, of course) I currently have some
software to convert BarneyScan 1.7 PC format to same, but have
run into some problems that arise from a difference in the way
the two versions treat the header information needed by the
rasterfile -- width, height, etc.
Please respond directly to me, I'll summarize and re-post.
Thanks much--
linda z.
Internet address: lz@idis.lis.pitt.edu
------------------------------
Date: Fri, 8 Jun 90 21:32:34 PDT
From: Les_Ferch@mtsg.ubc.ca
Subject: DiskCopy on 1MB Macs
A really great diskcopy program from Apple called "DiskCopy" (never
would have guessed) is available via anonymous ftp from apple.com.
Only one problem, it requires about 850,000 bytes of free memory to
copy an 800K disk. This makes it pretty much unuseable on a 1MB
machine (under normal circumstances). You can get it to work on a
1MB Mac Plus or SE if you put it on a disk with System 3.2, but this
won't work on higher end Macs. What will work (on most machines),
is if you put it on a disk with the System file from a "Tour of the
Mac IIx" disk. The system file info is:
System 4.1 tailored for Tour of the Mac IIx 2.0, 7/10/88
Created Jul 10, 1988, Size 83,887 bytes
What you do is:
1. Format an 800K disk
2. Copy the above mentioned System file and DiskCopy to the disk.
(Do NOT make any folders on this disk)
3. Use a program such as Fedit+ to edit the boot blocks and make one
of the following changes:
a. If you wish to be able to quit from DiskCopy and get a
"Restart" button, change the "Initial File to Run" to
"DiskCopy".
b. If you wish to just return to DiskCopy when selecting "Quit",
(useful for an unattended system), change "Finder File Name"
to "DiskCopy".
4. Whenever you need to do some disk copying, just boot up this
special DiskCopy disk.
I can guarantee you that this handy tip is *NOT* supported by Apple.
Also, this setup won't work on a Mac IIci or IIfx, but there
couldn't be very many people with one of these machines and only 1MB
memory.
------------------------------
Date: Mon, 11 Jun 90 15:49:47 -0400
From: sdussin@dev.dtic.dla.mil (Steve Dussinger)
Subject: DON'T USE FASTBACK II !!!
In comp.sys.mac.digest you write:
>DON'T USE FASTBACK II!
>AS SOON AS I STARTED THE
>BACKUP PHASE, THE DISK DRIVE CONTINUOUSLY SPUN AND EVERY FEW SECONDS, THE HEADS
>WOULD ENGAGE DOWNWARDS TO READ THE BOOT BLOCKS OF A NOT YET INSERTED DISK!!!!!
>When I did put a disk in there, it made a horrible grinding noise, and then
>started writing to the disk (FDHD, by the way). This is BAD!
> If anyone has noticed similar or contrary behaivor of this program,
>please respond either to me or Info-mac. Responses to me will be reposted
>in a summary by me. I would like to hear from other people about this,
>epecially if I am wrong or have an outdated version (2.00 7 JUNE 1989), as
>this is a serious, and potentially expensive, problem.
Greg:
I also noticed this problem with FASTBACK II. There is however, a
solution that you can use (although it's not real pretty). Each time a disk
is ejected by FASTBACK II, click on the "pause" button in the Backup Files
window. When you click the pause button, all activity stops, including the
seeking of the floppy drive. You can then remove the ejected floppy and
place a new one into the drive. After inserting the new floppy, click on the
resume button, and off you go. This should allow you to use FASTBACK II,
until 5th Dimension can release a fix for the problem (assuming that they
are trying to fix it :-) ).
Steve Dussinger
------------------------------------------------------------------------------
Arpa: sdussin@dev.dtic.dla.mil -or- sdussin@dgis.dtic.dla.mil
UUCP: ...!uunet!dev!sdussin
CServ: 76314,2342 AOL: Sdussinger
------------------------------------------------------------------------------
------------------------------
Date: Mon, 11 Jun 90 09:04:15 EDT
From: hewett@cbl.umd.edu (Steve Hewett)
Subject: FASTBACK II
Despite the explanation by Dwayne Melancon of Fifth Generation
Systems, I personally do not like the idea of putting
disks into disk drives that are already spinning. There are a few
companies writing back-up software that do this, and I refuse to
purchase their products and recommend to our staff that they not
purchase those products. To my mind, the gain in time saved by continually
running the disk drive is not worth any potential problems that
may result. My impression was that disk drive
manufacturers assume that the drive is not going to be
running when the disk is inserted. - Just my own opinion.
Steve Hewett, Computer Specialist, Chesapeake Biological Lab
------------------------------
Date: Mon, 11 Jun 90 07:01:53 CDT
From: mosemann@fergvax.unl.edu (Russell Mosemann)
Subject: Fingerprints
I thought I read an article a while ago stating that there was a device
available to connect to a computer which would scan fingerprints. For a
few dollars more, it would even check such things as blood flow to insure
that a real, live finger was being scanned. The device would be used to
control access to equipment or an area.
I also thought that I read an article describing software a company had
written to control the number of times a piece of software was run on a
Macintosh network from a Macintosh file server.
At the time, the information was interesting, but I had no use for it.
Now that I want to check into these things, I can't find the former
references. I have breezed through back issues of _MacWEEK_, _MacUser_,
and _MACWORLD_, to no avail.
Can anyone confirm the existence of these two items (to preserve my
sanity), and if your memory is better than mine, can you email me a
name/telephone number or publication/issue where I can get more information?
Thanks.
|->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->->
| Russell Mosemann | "I think, therefore I am." Descartes |
| "Semper Ubi Sub Ubi" | "I am, therefore I think." |
|_._._._._._._._._._._._._._| "I think I think, therefore I am not" |
| The above is an opinion, |_._._._._._._._._._._._._._._._._._._._._|
| and it's probably mine. | Internet: mosemann@fergvax.unl.edu |
<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-<-|
------------------------------
Date: Mon, 11 Jun 90 01:01 EDT
From: "Gary Johnston, Music Department" <JOHNSTON@nkuvax.bitnet>
Subject: Info-Mac Digest V8 #112
Re: Gatekeeper Aid
I have also had an incompatibility problem that was traced (after much
misery) back to GateKeeper Aid. I am running sys 6.0.4 on a Mac SE/30,
Mac II, and Mac SE. On ALL of them, whenever I would do a command-I
on and active Finder (get info) the cursor would freeze and/or the
System would bomb with a random error message. Yes, I removed all other
INITs like a good boy (I am an init-fanatic) and the problem was still there.
I even re-installed mu system twice - the second time I trashed the
current system and finder before installation so no funny resource
would be carried over. It about drove me nuts before I deduced the
problem.
Gary Johnston
Northern Kentucky University Music Department
JOHNSTON@NKUVAX.BITNET
Applelink: UG0054
GEnie: JOHNSTON
CompuServe: 10020,104
------------------------------
Date: Mon, 11 Jun 90 16:39 EDT
From: ND3Y@vax5.cit.cornell.edu
Subject: Learning to type
Learning to Type
My wife and I are looking for a good program (commercial, PD
or SW) for learning to type. The program should include learning the
keyboard as well as improving speed and accuracy. Please send
comments directly to me and I will summarize for the net if there is
sufficient response.
Jon Stewart (Cornell University)
ND3Y@VAX5.CIT.CORNELL.EDU
------------------------------
Date: Mon, 11 Jun 90 10:11
From: "Peter Maurer" <RY06%DKAUNI2.BITNET@forsythe.stanford.edu>
Subject: Lists in Think C 4.0
Hello,
I'm developping programs with THINK C 4.0. I use the THINK Class Library
for object oriented coding. In a large program, I need Lists for in
several circumstances. So I'm going to implement a new class called
CMacList using the ListManager Packege (discription in Inside Mac 4)
as a subclass of the CPane Class. But there are two problems with this:
1. The LNew-call wich initializes the list wants a WindPtr as a
parameter. I know that this parameter is used to set the grafport
of the list, but I want my Panes grafport to be the lists grafport.
What I don't know is how the LNew-Call works inside and wether the
WindPtr-parameter is used for other things than setting the
grafport. If not, is it possible to call LNew with a dummy
setting the grafport of the list later ?
2. My lists will be longer than a page on the screen, so they need
to be scrollable. The ListManager manages the scrollbars of the
lists (they are never to be printed), so I thought, that a
CPane subclass would be o.k. But being new on object oriented
coding, I'm not shure, wether I'm right. Do I need a CPanorama
subclass for this purpouse.
Answers are wellcome to my mailing address. I do not know wether there
are more people interested in this problem, so please drop a note
to my mailing address, if you are interested. I will inform you about
the answers, or if there are many people being interested, I will
summarize for the list.
I hope I made clearly what my problems are and I didn't make to many
mistakes - I know my English is bad. If you didn't understand my
problems or need some more information to help, just mail.
Thank you in advance
Peter
***********************************************************************
Peter Maurer
RY06@DKAUNI2 (DEARN)
Computer Center Univ. Karlsruhe,West-Germany
Programmers Information Service
***********************************************************************
------------------------------
Date: Tue, 12 Jun 90 09:22 N
From: <INGUILOD%CNEDCU51.BITNET@forsythe.stanford.edu>
Subject: looking for HyBase experiences ?
I am looking for someone who is using HyBase (from Answer
Software Corporation) with HyperCard or SuperCard / Plus.
Comments, reports and experiences are wellcome.
Thank's in advance.
JG. Email: inguilod@cnedcu51.bitnet
------------------------------
Date: Sun, 10 Jun 90 23:24:57 CDT
From: Frank W. Peters <fwp1@cc.msstate.edu>
Subject: Need 3270 emulation
In comp.sys.mac.digest you write:
>I have found myself in need of a 3270 emulator. Does such a thing
>exist for the Macintosh.
Indeed there is. It is put out by Brown University and is quite nice.
It supports color and allows you to use the mouse to position the
cursor on the screen.
You can obtain it from brownvm.brown.edu. Get files TN3270.READ-ME and
TN3D7.SITHQX from their anonymous FTP directory.
Or you can get it via anonymous FTP from ra.msstate.edu in directory
pub/mac as files tn3270.readme and tn3d7.sithqx.
If you aren't familiar with anonymous FTP or don't have FTP access let
me know and I'll explain further or try to mail it to you (it is
quite large though...so it would be best if you could FTP it).
Regards
--Frank
--
Frank W. Peters Systems Programmer Computing Center & Services
fwp1@CC.MsState.Edu Peters@MsState.Bitnet (601)325-2942
"I can't give you brains, but I can give you a diploma." -- The Wizard of OZ
------------------------------
Date: Mon, 11 JUN 90 15:11:00 PDT
From: <MICRO2.KEMPF@crvax.sri.com>
Subject: Need help using serial ports
I'm trying to control peripheral devices from my Mac IIci through
the serial ports. I'm using THINK C. I need to be able to send
simple ASCII commands to the devices and receive status msgs back.
Is anyone willing to share their knowledge/examples/time to show
me how to do this. Thanks alot.
Jim Kempf
MICRO2.KEMPF@SRI.COM
------------------------------
Date: Sat, 9 Jun 90 03:06 -0300
From: "JOAO C. PORTINARI" <PUCRJPP%BRFAPESP.BITNET@forsythe.stanford.edu>
Subject: Old CD-ROM Drive: Is LODOWN still alive?
Hello MacNetters:
This one is on behalf of a friend.
He bought a CD-ROM Drive (made by Toshiba Model # XM-2100A, Serial #
7Z36000290) back in old 1988, from ALOT (Arc Laser Optical Technology) --
later renamed LoDOWN.
When trying to run the new HyperCard/CD Audio programs RThe Magic FluteS and
RBeethovenTs Ninth SymphonyS, the drive wouldn't mount, although it reads
normally other regular computer CDs (such as Educorp's, for example). It also
plays normal Audio CDs.
He tried switching the drive's inits to Apple's, with no avail.
The manual says that he should contact his drive's seller or manufacturer in
order to get the appropriate init files (Audio CD Access, Foreign File Access
and the init file appropriate for the particular drive he has purchased).
It happens that all the phone numbers listed for the manufacturer (which was
also the seller) have been disconnected, and my friend is at the end of his
resources to solve his problem.
I would very much appreciate if any of you fellows could give us a hand,
signalling if LoDOWN still exists, or if you have any pointers as to what he
sh
Please reply directly to me, and I'll summarize for the net, if there is enough
pucrjpp@brfapesp.bitnet.
Thanking in advance.
Joao C. Portinari
Projeto PortinariRua Marques Sao Vicente 225
Rio de Janeiro, RJ 22453 Brazil
------------------------------
Date: Mon, 11 Jun 90 22:24:27 MDT
From: ssds!clayc@uunet.uu.net (Clay Calhoun)
Subject: Printing
Hi,
Does anyone out there know of way I can print FROM a Unix box, THROUGH
a Gator box, TO a LaserWriter on an appletalk net???? :-)))))
Please replay directly - and I'll summarize if enough interest!
==============
Cheers,
Clay Calhoun
ssds!clayc@uunet.uu.net
------------------------------
Date: Sun, 10 Jun 90 6:50 GMT
From: ZDTL123@ash.cc.kcl.ac.uk
Subject: Queries about Vital Lasertype Inc.
I am looking for a FAX number for Vital Lasertype Inc (1-800-SOS-FONT),
of 591 Camino De La Reina, Suite 1025, San Diego, CA 92108, or for a
number I can dial from London. They produce supposedly compressible
PostScript fonts. Anyone ever tried their wares, eh? I'd appreciate
any information.
-nigel yeoh- zdtl123@uk.ac.kcl
------------------------------
Date: Tue, 12 Jun 90 08:32 EDT
From: <PJORGENS%COLGATEU.BITNET@forsythe.stanford.edu> (Peter Jorgensen)
Subject: Retro.SCSI INIT puzzle
Greetings,
Today's puzzler (as Click and Clack would say) is: I've just installed an
Alliance tape backup drive on a MacII. It came with Retrospect which comes with
an INIT to speed up SCSI data transfer, so naturally, I put that in the system
folder. (We're also running Gatekeeper, GateKeeper AID, INIT CDEV, TOPS,
broadcast Moire and MacroMaker.) When we reboot, the icons for the GateKeepers,
moire and broadcast appear and then it crashes with id=01. OK, so it must be
the Retro.SCSI INIT, perhaps I need to give it some GateKeeper rights to modify
the system or something. HERE'S THE PUZZLE: If I invoke INIT CDEV (while
booting) and simply click "OK" WITHOUT disabling any INITs it boots fine! Also,
preventing Retro.SCSI from loading (by using INIT CDEV or removing it from the
system folder) prevents the crash.
I just thought I'd throw this out to the net for those of us who like to bang
our heads against these kinds of walls.
Peter Jorgensen
Microcomputer specialist
Colgate University - Hamilton, NY 13346
AppleLink - U0523
BITNET - PJORGENSEN@COLGATEU
tel - 315-824-1000 ext 742
------------------------------
Date: Fri, 8 Jun 90 23:52:13 -0400
From: moy@itd.nrl.navy.mil (Gene Moy)
Subject: Sad Mac codes
Where can one find what the various sad Mac codes mean? I seem to
recall a mention of these at one time in this forum.
Gene
------------------------------
Date: Mon, 11 Jun 90 08:59:31
From: alfonso%ercole.cefriel.it@forsythe.stanford.edu (Alfonso Fuggetta)
Subject: Sharp IQ 7000
I would like to connect my Sharp IQ 7000 BOSS to a Mac SE/30 running
Focal Point II. Does anyone know any product to do that or the fax
number of the producer of Focal Point (TenPointO - Menlo Park CA)?
Sincerely
+-------------------------------------------------------------+
| Alfonso Fuggetta c/o CEFRIEL |
| Senior Researcher Via Emanueli, 15 |
| 20126 Milano - Italy |
| |
| Tel. +39-2-66100083 |
| FAX +39-2-66100448 Bitnet: alfonso@imicefr.bitnet |
+-------------------------------------------------------------+
------------------------------
Date: Tue, 12 Jun 90 11:29 +0100
From: Pieter Stouten <STOUTEN%EMBL.bitnet@forsythe.stanford.edu>
Subject: SIMMs from UK at reasonable prices (forwarded mail).
Date: Sat, 09 Jun 90 13:33:45 (GMT)
>From: Sak Wathanasin <sw@network-analysis-ltd.co.uk>
Subject: SIMMs
You may like to know that there is a user-supported BBS in the
UK called Mactel, from whom you can obtain SIMMs at reasonable
prices. Don't know what current prices are, but the last time I looked
it was 60 pounds sterling/MB, less if you got 4 or more at a time.
Of course, you have to pay (your country's) VAT on top, but no duty
(already paid on import to the UK), and shipping should be less. More
expensive than direct import but less hassle I think. These are 80 ns
SIMMs suitable for IIcis (but not IIfxs) as well as slower Macs.
Anyway, for your information, you can get in touch with them through
the following nos:
a) +44 602 455077 (voice)
b) +44 602 455121 (fax)
c) +44 602 455444 (BBS: 3 lines 2400/1200 8/N/1)
They also do HDs at good prices.
Just a satisfied customer (4 Mbs ram, 45MB & 100 MB external drives).
--
Sak Wathanasin
Network Analysis Limited
uucp: ...!ukc!nan!sw
other: sw@network-analysis-ltd.co.uk
phone: (+44) 203 419996
telex: 9312130355 (SW G)
snail: 178 Wainbody Ave South, Coventry CV3 6BX, UK
------------------------------
Date: Mon, 11 Jun 90 14:18:04 PDT
From: dmittman@beowulf (David Mittman)
Subject: SpInside Macintosh
I recently picked up a copy of the Q&A Stack from Apple DTS and I see many
references to "SpInside Macintosh." What is "SpInside Macintosh" and where
can I get a copy?
- David Mittman
DMittman@Beowulf.JPL.NASA.GOV
------------------------------
Date: Mon, 11 Jun 90 15:03:41 MDT
From: daspit%zodiac@johns.Stanford.EDU (John Daspit, C.U. LASP, (303)492-6951)
Subject: Summary - failing Mac Plus power supplies
The following is a condensation of the replies I received in reference to
my request about failing MAC Plus power supplies:
>From: com%"dplatt@coherent.com" 7-JUN-1990 03:26:19.68
Subj: Mac Plus problems
I understand that there are several parts which tend to go out... and
that if one goes, the others may soon follow.
You can buy power-supply repair-and-upgrade kits from a couple of
sources... try calling MicroMat at (415) 898-6227, or Soft Solutions at
(503) 461-1136. MicroMat can sell you a schematic or repair-tutorial.
Soft Solutions offers a warranty on repaired boards (even those which
you repair yourself using their kits, I believe), and also offer a
repair service.
I haven't dealt with either of these companies myself; I've heard from
one Soft Solutions customer who was satisfied with his purchase ("They're
nice folks"), he said.
>From: BITNET%"NBEHR@ECNCDC" 7-JUN-1990 03:39:56.69
Subj: Analog boards
First, the best source for this sort of thing is a recent book on
Mac hardware maintenance (I saw it a month ago at a local Dalton's,
but I can't remember the exact title nor the author; others will most
likely email those to you). Second, the failures are not always limited
to a transistor (or, more often, a capacitor). They usually begin with
cracked solder joints on the PCB, which can then cause currents in
excess of the norm, and the result is quite often a burnt flyback
transformer. In short, diagnosing the failure and getting the right
parts would probably cost you almost as much as a new board - unless
you're a relatively skilled technician. The "design flaw" is most
likely not in a single component, but in the lack of a fan; everyone
who deals with electronics equipment will tell you that convection
cooling with those measly slots on top of the Plus is simply murder.
But I'd rather pay $150 every couple of years than have headaches from
continuous noise...
Anyhow, don't take my word for all this - if others suggest replacing
a single part, by all means, go for it. Just be careful; I still have
a screwdriver with melt marks which I made by discharging a capacitor
in the power supply after it was off for an hour. Eric (NBEHR@ECNCDC)
>From: BITNET%"ROSKAR@JHUVMS.BITNET" "Veljko Roskar" 7-JUN-1990 16:28:47.29
Subj: Fixing Macs
Try calling Total Systems in Oregon. They offer kits, parts and schematics
for various Mac problems. I don't know their number offhand but try
(800) 555-1212 and if directory assistance can't help you I'll dig up the
number.
Try Soft Solutions, 503-461-1136
$51 kit to upgrade all marginal components on MAC+ power supply.
8 caps and 2 diodes. Cost more (?) if flyback transformer is bad.
>From: BITNET%"MTOOMEY@UGA" "Mark Edward Toomey" 9-JUN-1990 13:38:46.50
Subj: Fixing Macs - Cap burn-out
John,
If the problem you're facing is the _standard_ no-video, vertical white
line on a black screen or total smoke coming out the top, chances are you
need to replace a 3.7 microfarad capacitor on your analog board. If you
are handy with a soldering iron & are familiar with the dangers of RF
voltages, it is a relatively simple procedure. If you are NOT familiar
with RF, DON't wet your finger & touch the red plug on the body of the
CRT :-). You can get anywhere from 7500 to 25,000 volts (low-current,yes
but enough to knock the teeth out of the person looking over your shoulder!!)
Your local electronics shop or retailer (Radio Shack,etc.) can supply you
with a comparable size, usually 4 microfarad, 150 volt electrolytic capacitor.
You'll see 2 fairly large caps on the upper corner of your analog card. The
one with the popped top, burnt shell or burnt legs is the one you want to re-
place. I get my caps at our campus electronics shop for $2.40 a piece & they'll
generally add about 6 months of life to the Mac. Definetly better than the
$156 now being charged for a new board!
Well, good luck & let me know if you break the nose of the guy lookin
over your shoulder :-) (Only kidding..old joke from us hardware/software
guys)
Disclaimer: The above is not to be taken as a recommendation or advise
to perform repairs on Macintosh computers.It is for educational purposes
ONLY & any action taken by the reader is taken at his/her own risk.
>From: SPOT::"bruce@lyra" 8-JUN-1990 14:15:28.53
Subj: Macintosh Repairs
As suggested in the following digest, Larry Pina's "Macintosh Repair $
Upgrade Secrets" is the way to go.
It is a Sams book published by Hayden. I wouldn't
be surprised to find it at B. Dalton's Software Etc.
I used this book to fix my Mac at home when the horizontal retrace
went bad (screen collapsed to a vertical line). As it says on page 81,
check the solder joints on C1, J1 and L2. Sure enough right in the place (J1)
where he says is the biggest heat source was a broken solder joint. Fixed
it in less than a hour from the time I opened the case to closing the case
back up.
A little electrical technique is required.
******************************************************************************
My thanks to all those who replied. The problem with this particular MAC+ was
C2 (3.9uf @35v) which I replaced with a 3.6uf @200v. It was not an easy one to
find as it is a non-polar mylar cap of fairly large value (for a non-polar).
Some folks said that this is the cause of about 75% of MAC+ video problems,
the symptom being a horizontal line across the display.
To repeat: this repair procedure should NOT be attempted by anyone who is not
familiar with electronic safety procedures.
John Daspit DASPIT@COLOLASP
------------------------------
Date: Tue, 12 Jun 90 11:08:42 CDT
From: Graeme <PL0BALF@vm.tcs.tulane.edu>
Subject: Three into two can go
Thanks to all those who responded to my question about how to attach three
devices to two ports. What is required is known variously as an A-B switch,
a T-switch or a black box. Possible sources are Altex electronics (800-531-
5369), Elek Tell (800 395 1000) and Inmac (800-547-5444). I happen to have
an Inmac catalogue which shows a picture of the very device: they call it a
cable T-switch ('cable' because the switch-to-Mac cable is attached) and
charge $39.95. They also have a range of fancier switch boxes up to $119.
I will hook my mainframe connection and DeskWriter to the modem port using
the switch and Appletalk to the printer port. No further communication
>From me on this topic should be taken to mean that everything works.
Thanks again to those who helped,
Graeme Forbes
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Date: Tue, 12 Jun 90 03:05 CST
From: GVUSR@ccvax.iastate.edu
Subject: virus infected program request
Readers of INFOMAC News,
This may seem like an aberant request, but I need several virus
infected programs. I am trying to set up an Anti-Virus workshop here at
Iowa State University and I need more than NVir-B (our dominate virus) for
actuals demonstrations. I plan on starting out with how to avoid viruses and
how to use software to detect and erradicate viruses, but I need to be able
to demonstrate how a virus is detected using Disinfectant and how Vaccine or
GateKeeper will stop it from infecting a protected system. If you can help me,
please Stuff and binhex any small virus infected programs and send them to
me directly, do not post them to the net.
This is our Users Groups first run through of this workshop and we
hope to establish this one and several others we can do each semester to
help stop the spread of viruses on campus and in the local Macintosh community.
If you have personally done something like this before give me you comments on
the effectiveness of the workshop and how you ran it.
Thank you in advance.
Tom Hillson
Program Coordinator
Iowa State Macintosh Users Group
"Is this heaven? No its Iowa." Also known as allergy hell.
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End of Info-Mac Digest
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