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TidBITS#172/12-Apr-93
=====================

 We present a PowerBook-heavy issue this week, with a look back at
   the real story behind the PowerBook 100 and a hopefully-
   instructive investigation of a weird Duo troubleshooting
   problem. We also have an announcement of a new virus, a bit on
   Macintosh Easy Open (which eases opening foreign file types) in
   MacLinkPlus, and finally, a review of CMaster, Jersey
   Scientific's extension to Symantec's THINK C.


This issue of TidBITS sponsored in part by:

* Dantz Development -- 510/849-0293 -- [e-mail]
    For Retrospect 2.0 upgrades, call 800/225-4880.

 For an index of files on Dantz Development and their products,
   please send email to <[e-mail]>. To receive all
   this information in one 73K file, please send email to
   <[e-mail]>. To receive a 29K compressed version of
   the same file, please send email to <[e-mail]>.


 Copyright 1990-1993 Adam & Tonya Engst. Non-profit, non-commercial
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Topics:
    MailBITS/12-Apr-93
    New INIT 17 Virus Busted
    PowerBook Panegyric
    Double the Trouble?
    CMaster Review
    Reviews/12-Apr-93

[Archived as /info-mac/digest/tb/tidbits-172.etx; 29K]


MailBITS/12-Apr-93
------------------
  We'd like to welcome our latest sponsor, Dantz Development, makers
  of some of the best backup software anywhere, including DiskFit
  Direct, DiskFit Pro (which I currently use), Retrospect 2.0 (which
  I intend to use once I have a DAT drive), and Retrospect Remote.

  We have several files from Dantz that I think you'll find
  interesting and useful, ranging from product data sheets to
  information about compatible tape drives to a white paper entitled
  "Workbook Backup - A Workbook for Macintosh Administrators" that
  will help you figure out the details of backing up a network. If
  you want a 73K file containing all of this information, send email
  to <[e-mail]>. If you want the same file in
  compressed form along with an Easy View index (29K - StuffIt 3.0
  format), send email to <[e-mail]>. If you want
  individual files, send email to <[e-mail]> for an
  index of available files.

  Dantz has another white paper called "Backup - Personal Computing
  Insurance" that I couldn't translate to straight ASCII. It
  discusses different backup philosophies, different types of backup
  devices, and the like. Dantz will send it to you at no charge if
  you email them your snail mail address. Thanks, and I'm sure Dantz
  will be happy to hear any feedback about the files or their
  products.

    Dantz Development -- [e-mail]


**Performa Mail** -- Bill Waits, who provided us with some of the
  information we used in last week's bit about new Performas, asks
  that people please stop requesting more information, especially
  about the Performa 430 and the modems, about which he has no
  information. It's not as though these Performas are interesting.
  They are exactly the same as comparable Mac LC IIs and LC IIIs,
  except they cost more and you buy them at Sears. In addition, I'm
  hearing of problems with installing System 7.1 over System 7.0.1P
  or 7.1P on the Performa 450 and 600. Apparently the enablers won't
  cooperate.


**Macintosh Easy Open**, an extension from Apple which allows you
  to substitute eligible applications to open files created by
  applications you don't have, is now available with MacLinkPlus.
  The extension replaces the standard "application not found" dialog
  with a larger one that lists programs that can open the file and
  can optionally remember your preference so that it uses that
  program automatically. Other benefits include more specific file
  descriptions in the Finder's "Kind" field and color icons in Open
  and Save dialog boxes. DataViz -- 800/733-0030 -- 203/268-0030 --
  203/268-4345 (fax) By Ross Scott Rubin <[e-mail]>


New INIT 17 Virus Busted
------------------------
  by Mark H. Anbinder, Contributing Editor -- [e-mail]
     Technical Support Coordinator, BAKA Computers

  In a joint bulletin released today by Gene Spafford of Purdue
  University, the various Macintosh antiviral developers announced
  the discovery of a new virus earlier along with new utility
  versions to combat it.

  The new virus, dubbed INIT 17, infects the System file and most
  applications as they run, and is likely to spread quickly once a
  machine is exposed to the virus. The virus infects programs by
  modifying existing code, which can in some cases cause irreparable
  damage to the applications or the System file. On some low-end
  Macs (such as the Plus, SE, and Classic) the virus can cause the
  computer to crash while executing infected applications.

  The only overt action by the virus is to display an alert message
  saying "From the depths of Cyberspace" the first time you restart
  an infected machine after 6:06:06 PM, 31-Oct-93.

  Users of Chris Johnson's freeware Gatekeeper package will be
  pleased to note that the current version, 1.2.7, catches INIT 17
  already, so they need not update. John Norstad has released
  version 3.1 of his free Disinfectant utility. Jeff Shulman says
  registered owners of his shareware Virus Detective package will
  receive search strings in the mail (a good reason to register your
  copy!). All commercial antiviral publishers are sending updates to
  their subscribers and mailing notifications to registered users;
  contact the publisher of your utility for further information.

  Information from:
    Gene Spafford -- [e-mail]


PowerBook Panegyric
-------------------
  Definition: PowerBook 100 - a terribly nice Macintosh sometimes
  mistaken for a low-end, powerless laptop.

  What happened to the PowerBook 100? It came out in September 1991
  at an unaffordable price. About one year later, Apple discontinued
  it and sold it at fire sale prices. Why such a short lifetime? It
  wasn't like the 140, which Apple realized could support a faster
  processor, and it wasn't like the Mac Portable, which died of
  obesity. In talking to people in the know, I've pieced together
  this story; consider it an eulogy to the PowerBook 100, a pleasant
  machine with only a few problems, a machine on which I type at
  this moment.

  Apple wasn't the only player in the PowerBook 100 development,
  because although Apple designed most of the PowerBook 100,
  consumer electronics giant Sony was slated to do the
  manufacturing. Apple wanted to work with Sony in part because Sony
  excels at inexpensive manufacturing, and in part because the
  collaboration was well-received in both the U.S. and Japan, a
  market in which Apple does well and wants to do better.

  But then Sony discovered it couldn't make the PowerBook 100 as
  cheaply as it had estimated and in fact, the cost would be
  approximately double early estimates. Apple realized early on that
  the price would be unacceptable, but the public relations coup of
  the Apple/Sony collaboration was more important. Apple decided to
  manufacture a relatively small quantity of PowerBook 100s. As
  consumers purchased the PowerBook 100 in the fall of 1991, Apple
  placed the final orders. Those final units rolled off the
  production line in late June of 1992, completing the installed
  base of over 100,000 PowerBook 100s.

  As to the rumors that Sony might bring it back, no more PowerBook
  100s have been manufactured since, and given the cost, I doubt any
  more will be, especially given that the Duos fit many of the same
  niches. Those of us who want a serial port, a power plug, and no
  floppy drive (I've hooked ours up maybe five times in six months)
  will stick with a Duo for future purchases. Sources indicate that
  we will never see a PowerBook 100 again in the U.S., but
  apparently there is a chance that something resembling the
  PowerBook 100 might appear elsewhere.

  The PowerBook 100 had a short life, and Apple had no chance to
  correct its few problems, as it did with the 140 and the 170.
  Perhaps the worst problem is the mediocre trackball. It's small,
  and because of the plastic posts on which it rests, occasionally
  hard to move accurately and smoothly. Some of that can be
  alleviated by moving the left blue roller further down, and the
  bottom blue roller further right. The idea is to lessen the
  pressure on the ball so it rolls more smoothly. Some people have
  also had luck roughing the ball's surface slightly with cleaning
  powder - don't use heavy duty sandpaper.

  Apple is known for its well-crafted prototypes, and it turns out
  that the PowerBook team made about thirty PowerBook 100s with
  modified trackball mechanisms from Logitech. These modified
  mechanisms use the same ruby bearings that the Duos use, and as a
  result they feel much smoother. Evidently Apple used the "Pepsi &
  Doritos" test, wherein they mixed up a slurry of Pepsi and Doritos
  and poured it into the trackball before testing it. The jeweled
  bearing trackballs passed with flying colors. A few lucky souls
  have these jeweled mechanisms, but unless someone can convince
  Logitech that the existing base of PowerBook 100 owners is a large
  enough market, the rest of us will have to suffer with the
  standard trackball. However, if a new version of the PowerBook 100
  does appear outside of the U.S., U.S. users would almost certainly
  see jeweled trackballs become available, and they might even make
  their way into repair stock.

  The only other problem the PowerBook 100 might have been accused
  of was lack of speed. The 100's peppy 16 MHz 68000 destroys the 8
  MHz 68000 in my Classic, but it is no match for the 68030 chips in
  the other PowerBooks. For basic word processing, which is probably
  the primary use of the 100, I doubt most people notice. I don't.
  But what if, in an alternate universe, the PowerBook 100 had a
  68030? You'd only have to go to Cupertino to find that alternate
  universe, because Apple made at least two 68030 prototypes. The
  prototypes imply that the ROMs can handle a 68030 chip, which
  helps verify a recently-rumored third-party 68030 upgrade for the
  100. Of course, the limited market of the 100 may curtail such
  plans, but what would you pay for a 68030 upgrade? I'm happy
  enough with our PowerBook 100 that the upgrade would have to be
  cheap, and from what I've heard, many other 100 owners feel the
  same way. Any new version of the PowerBook 100 will use a 68030
  chip in place of the slower 68000, if only because the 68030 is
  cheaper now.

  The most memorable feature of the PowerBook 100 must be its glory
  days in the bargain basement. When Apple dropped the prices to
  clear stock, the PowerBooks flew out of Price Clubs and dealers
  alike. No one had seen a computer sell like that, which shows that
  if you price something like a PowerBook right, you'll have to beat
  the buyers away with a stick. It appears the 100's legacy will be
  this method of cleaning out old machines to judge from the way
  Apple discontinued the IIsi and dramatically lowered IIsi prices.
  I think it's a great move on Apple's part, and I hope they keep it
  up. Those fire sale prices allow people to buy a Mac who, for one
  reason or another, probably never would have bought one then
  otherwise. On that basis alone, the PowerBook 100 was a smashing
  success, and as I type on our sub-$1000 8 MB/20 MB PowerBook 100,
  I see nothing but that success.

  Information from:
    Pythaeus


Double the Trouble?
-------------------
  A friend had problems with his Duo 210 recently, and I thought a
  brief exposition of how we solved them might prove useful to Duo
  users and anyone who does trouble-shooting. Bill has a Duo 210 and
  a Duo Dock, although no monitor at the time. He could to print to
  his serial DeskWriter, but printing to a PostScript LaserWriter or
  to a PostScript file (with or without background printing on and
  from almost any application) caused his Duo to hang. However, when
  he printed from PageMaker using the Aldus driver, it worked fine.
  He tried the standard procedures, booting without extensions,
  replacing the LaserWriter driver, and even reformatting his drive
  (getting more space by repartitioning in the process) and
  reinstalling the System and his applications from scratch. Nothing
  worked. After he had an Apple Express Modem installed, his serial
  DeskWriter acted up as well, but we solved that by installing the
  DeskWriter 3.1 driver and fiddling with the many Control panels
  that control the port mapping.

  Finally he brought his Duo, Dock, and DeskWriter over here so we
  could test on my network and use my 13" monitor with the Dock.
  Three problems arose quickly, and all the problems occurred
  whether or not the Duo was docked. First, the DeskWriter in
  AppleTalk mode hung halfway through printing if extensions were
  on. Second, when I tried to copy Conflict Catcher from my hard
  drive over the network to the Duo, I received failures with error
  #-37. Third, printing to my QMS-PS 410 PostScript laser printer
  caused a hang after the first "starting job" message.

  Running Conflict Catcher in Conflict Test mode identified the
  elderly SNDPatch extension as the culprit for the DeskWriter
  printing problem. One down, and a win for Conflict Catcher since
  Bill had a slew of extensions that would have taken hours to test.

  We then spent an hour trying to figure out why the Conflict
  Catcher files wouldn't copy, and eventually chalked it up to
  network daemons when we realized all other files copied fine. We
  finally ended up copying the Conflict Catcher files in an archive,
  and CopyDoubler author Dave Heller of Fifth Generation Systems
  told me several days later that the problem stemmed from the fact
  that those two filenames started with an ASCII 0 character to make
  them sort first. Apparently, an ASCII 0 character first in a
  filename confuses network copying to no end. On to the printing
  problem, which was the main one anyway.

  Booting without extensions made no difference, and neither docking
  the Duo nor using the LaserWriter 7.2 driver was any more
  encouraging. Finally, we laboriously modified a copy of the Disk
  Tools disk so we could boot from floppy and print. You need a
  System, Finder, Duo Enabler, and Chooser in addition to
  LaserWriter, and there is barely enough disk space. When we booted
  from that disk, the QMS came to life and printed correctly.
  Replacing the System and the Finder with the versions on the
  floppy made no difference, so we copied the entire boot floppy's
  System Folder to the hard drive and blessed it in favor of the old
  System Folder. That worked, which isolated the problem to the old
  System Folder. We gradually moved folders over to the new System
  Folder (testing as we went) and it worked fine until we moved the
  Fonts folder (remember, this is a Duo, so 7.1 is necessary). Aha,
  a corrupted font! I hadn't thought to check Bill's fonts since I'm
  not used to System 7.1 and the System file hadn't been the
  problem, but it turned out that he had a herd (or maybe fonts come
  in gaggles or troops?) of public domain TrueType fonts.

  At first we thought it might be related to the fact that he had
  some fonts loose and others in suitcases. Bill had heard that
  loose fonts can cause troubles, but packing his loose ones in a
  suitcase didn't help, and it ended up being a matter of testing
  each font, one at a time. Too bad Conflict Catcher doesn't help
  with fonts. Bill isolated the rogue font to be London, edging out
  the one we suspected on principle, Nixon in China.

  The curious part is that we were easily sidetracked because of
  unrelated problems that seemed to point to AppleTalk and the
  LaserWriter driver. The fonts were also disguised by the fact that
  he had printed all them, including the corrupted one, via the
  serial driver for his DeskWriter. Yet, somehow the LaserWriter
  driver looked at all fonts, even those not used, and crashed when
  it hit the corrupted one.

  There are three morals to the story. First, the Duo can be a
  mega-pain to troubleshoot if you don't have a floppy drive and an
  appropriate dock, although booting from a stripped RAM disk should
  have had the same effect and I'm still kicking myself for not
  having suggested that earlier. Second, corrupted fonts can cause
  seemingly unrelated problems, which I also should have considered,
  and if you don't do a clean install, those fonts exist in a new
  System as well. Third, in many trouble-shooting situations,
  booting from a clean system disk like Disk Tools can crack open a
  problem.

  Incidentally, Tonya and I were talking about ways switching among
  multiple Systems, and we thought of a simple way of un-blessing
  (cursing?) a System Folder. In the System Folder, create a self-
  extracting archive of the Finder, and when you want to un-bless
  the System Folder, throw out the Finder. When you want to bless
  that System Folder again, expand the self-extracting archive
  (which will stick around for the next use), close the folder, and
  open it again so the active Finder realizes what you've done. It's
  generally a bad idea to have two potentially-active System Folders
  on the same disk, and this provides a low-tech way to switch
  systems without a switching utility.


CMaster Review
--------------
  by Andrew Johnston -- [e-mail]
     President, Johnston/Johnston Consulting, Macintosh Developer

  Jersey Scientific's CMaster is an extension for Symantec's THINK C
  that is 90 percent enhancements to THINK C's rather austere
  editor, and 10 percent enhancements to THINK C's project
  environment. THINK C's editor has always been ripe for
  improvement, and CMaster provides a useful set of tools that
  either adds new functionality or improves access to existing
  features through an iconic palette.

  CMaster is compatible with THINK C 4.0.x or newer and System 6.0.5
  and newer, although some features require THINK C 5.0.x. I used
  CMaster version 1.0.9 on both a Mac IIcx with a 25 MHz Radius
  Rocket 040 accelerator and on a PowerBook 170, both under System
  7.1.

  CMaster patches itself into THINK C and intercepts several THINK C
  routines including GetNextEvent, which lets CMaster intercept many
  events before THINK C sees them. CMaster does this well, and this
  arrangement caused no crashes. CMaster loads when you open a THINK
  C project and uses around 77K of THINK C's application heap. You
  can disable CMaster by holding down the option key when opening a
  project file.


What it does
  On the left side of each editor window, CMaster icons provide
  navigation aids, searching, block commenting, multiple clipboards,
  general placemarkers, a function prototype generator, a function
  navigator, a pop-up function name menu, and a header file pop-up
  menu. In addition, CMaster has a slew of keyboard-only commands
  that join lines, split lines, etc. You can tie almost every
  CMaster action to a user-defined keyboard command, and you can
  modify CMaster's palette.

  Several tools duplicate built-in THINK C features (e.g. markers
  and the headers files pop-up menus), but they seem to simplify
  access. However, CMaster uses its own parsing routines to
  determine the placement of the function markers that allow CMaster
  to update the function marker list when you type in a new function
  definition. No more running your source code through a "marker"
  application or explicitly marking functions within THINK C.
  CMaster also allows the use of the "#pragma mark xxx" syntax to
  insert custom non-function header markers into source code.

  The more-interesting editor tools include multiple clipboards and
  multiple placemarkers. Up to four clipboards can be active at a
  time - each with both a global and local clipboard attached. You
  can optionally set up clipboards to use a push down stack that
  will hold multiple clipboard contents in a First-In-First-Out
  (FIF0) stack. CMaster also has up to four temporary placemarkers
  that temporarily mark a place holder in the current source file
  without being recorded in the resource fork for later use.
  Placemarkers show the line marked plus a few surrounding lines in
  a mini-window if you click in the lower half of the place marker
  icon. This is useful when you need to reference another function
  (or code segment) in the same file because it eliminates jumping
  back and forth and reduces the need for split windows in the THINK
  C editor.

  Although the bulk of CMaster's functions are editor-related, I
  most appreciated the other functions. THINK C 5.0.x can take
  advantage of source code control information from Apple's MPW
  Projector tool. This was a great step forward for those of us who
  use both THINK C and MPW. I don't know how many times I was using
  MPW Projector for source code control and inadvertently changed
  the source using THINK C. CMaster has two window preferences
  settings that help out - "Make files outside project read-only"
  and "Make locked files read-only." Both options make the files
  appear to be Projector read-only files, which helps prevent stupid
  mistakes like accidentally changing a source file in the wrong
  environment. I find this especially helpful when working with the
  THINK Class Library (TCL), an ungodly amount of source code that
  I'm constantly looking at via the editor. These files are
  unprotected from inadvertent changes, the slightest of which can
  be next to impossible to locate and will render your application
  worthless. Also, the "Make locked files read-only" option protects
  you from trying to change a source file only to find out on saving
  that the file was locked. Don't laugh - it happens!

  The "Open Project Resource File Warning" can also save you time.
  It warns you when you try to build or run a THINK project with the
  resource file still open in a resource editor. Normally THINK C
  would build or run the application without loading any resources,
  most likely resulting in a bus error when the application runs.


Problems
  The only flaky behavior I discovered was in the "Show Preceding
  Comments" option. This feature displays at the top of the window
  any comments directly before a function definition (and therefore
  its marker) when you select the marker for the function and scroll
  the window to show the function. This works well if there actually
  are comments before the function; however, if the comments sit
  between the function definition and the opening curly bracket,
  CMaster places the function definition line just out of view.
  Jersey Scientific indicated that they would fix the problem in the
  next update. Most people will find this feature useful since
  comment headers describing functions are commonly placed
  immediately preceding the function, and in fact, Symantec
  commented the TCL this way.


Improvements
  I asked if Jersey Scientific might add the capability to search
  MPW 411 style help files, which are generic text-only kind of open
  format help files so users can create their own help files. This
  kind of 411-lookup feature would provide some way to access custom
  help from within the THINK environment. Jersey Scientific
  mentioned that they were hard at work on a major upgrade of
  CMaster, but they don't think it will be ready to ship until later
  this year. (They noted that this is NOT an announcement, but
  rather that they were working on a new set of features that they
  hope will be CMaster 2.0.) This new version may have a feature
  that would let users write their own extensions to CMaster that
  would support MPW 411 files. Interesting thought - an extension to
  an extension of THINK C!

  CMaster could take better advantage of color. Jersey Scientific is
  aware of this deficiency and discussions with them indicate that
  the next release will better support color. I would particularly
  like to see CMaster use color styles for functions, keywords, and
  comments. This can greatly increase the readability of source
  code, and although it would add significantly to CMaster's parsing
  responsibilities, high-end development tools like ACIUS
  ObjectMaster already have such capabilities.


Overall
  This is not a complete discussion of CMaster's every feature. I
  only mentioned the main ones and those that I found particularly
  interesting. Almost all the features have some kind of option key
  variant that makes them more useful than it seems at first glance.

  Jersey Scientific responded quickly to email queries and even
  answered their tech support line. They post CMaster updates in the
  THINK C file section on CompuServe, and from there to sumex-
  aim.stanford.edu for anonymous FTP. Jersey Scientific prefers that
  you use the CompuServe address if possible, especially from the
  Internet.

  Is CMaster worth $69.95, or about a third of THINK C's street
  price? It significantly enhances the THINK C environment in ways
  that will probably save you time and aggravation. If you use THINK
  C on a weekly basis, CMaster is necessary. If you use THINK C
  daily you will save yourself $69.95 worth of your time in the
  first week.

  The real question is how much, if any, of this functionality will
  be included in THINK C 6.0, which is rumored for release this
  spring (MacWEEK 15-Feb-93). Jersey Scientific cannot, for non-
  disclosure reasons, say anything about even the existence of THINK
  C 6.0, much less its features. Jersey Scientific did say that they
  will do their best to release a compatible version as soon as
  possible after Symantec ships a major upgrade to THINK C. This
  will most likely be version 1.2, and will resemble 1.0.9 in terms
  of features, although it will drop support for THINK C 4.x (THINK
  C 5.x and 6.x will be supported). New users can expect the price
  of CMaster to increase with version 1.2, but upgrades will be
  provided at nominal cost.


CMaster -- $69.95
    Jersey Scientific, Inc.
    545 Eighth Avenue
    New York, NY  10018
    212/736-0406
    212/947-4981 (fax)
    [e-mail]
    AppleLink: jersci


Reviews/12-Apr-93
-----------------

* MacWEEK -- 05-Apr-93, Vol. 7, #14
    SpreadBase 1.01 -- pg. 47
    Turbo 3D 5.0.3 -- pg. 47
    Multi-Ad Creator 3.5.2 -- pg. 54
    PowerLink Presentor -- pg. 54

* MacUser -- May-93
    LaserWriter Pro 630 -- pg. 50
    RocketShare -- pg. 52
    Transparent Compression Utilities -- pg. 57
      AutoDoubler
      SpaceSaver
      More Disk Space
    artWORKS -- pg. 62
    OrgChart Express -- pg. 63
    Passport Producer -- pg. 71
    PowerDraw 4.0 -- pg. 75
    Public Utilities -- pg. 81
    Spiral -- pg. 87
    Guaranteed Undelete -- pg. 87
    Who Killed Sam Rupert? -- pg. 87
    SpeedyCD -- pg. 88
    Spectator -- pg. 89
    Color Flatbed Scanners -- pg. 106
      (too many to list)
    Two-Page Color Monitors -- pg. 128
      (too many to list)
    Continuous-Tone Printers -- pg. 150
      (too many to list)
    Network Monitoring Programs -- pg. 191
      Mac-to-Mac NetWORKS 2.0
      Net Watchman 1.3
      Network Vital Signs 1.01
    PowerBook-to-PC Connectivity Products -- pg. 203
      Laptop Liberator 2.0
      PowerBook/DOS Companion
    Education packages -- pg. 215
      Alphabet Blocks
      Reader Rabbit 2
      Stickybear's Reading Room
      Word Tales


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