TweetFollow Us on Twitter

MacNosy
Volume Number:2
Issue Number:3
Column Tag:Programmer's Forum

MacNosy Gets a Facelift

By Steve Jasik, Jasik Designs, Menlo Park, CA

MacWorkStation News

Apple announced the availability of MacworkStation in the January developer newsletter in a small article. I think that this is what Scully has been talking about in some of his recent speeches when he mentions the Mac as a workstation. The only problem with the MacworkStation [a software program] is that instead of making it a public domain standard, Apple is licensing the source code for $1500 to "interested" parties. My present feeling is that it would do more for Mac sales to sell the source code for a nominal fee then to license it.

MacworkStation is a host based applications environment that enables host computer software to control the Macintosh user interface on a Macintosh. The idea behind the MacworkStation is that it's a way of writing applications on a host so it can utilize the graphic interface of the Macintosh. Just think, soon we will be able to log on to MAUG or Delphi and instead of emulating a teletype or a VT 100, we will have menus and windows, etc.

MacworkStation consists of two parts, a protocol definition and a first implementation of that protocol. The protocol defines commands which are sent to the Macintosh, telling it what to do (put up a dialog box, etc). Events are defined to pass back to the host what is happening on the Macintosh. Note that much of what happens on the Mac need not be sent back to the host. The other part is a Macintosh Application that implements the protocol definition on a Macintosh. It is a generalized Macintosh application that is capable of being driven by an external process (the host). Unlike terminal emulation, the MacworkStation allows the host full access to the windows, pull down menus, dialogs, and other features of the Macintosh user interface.

I hope this gives you enough information to whet your appetite. Just think of putting the Mac user interface on your favorite mainframe application. You will have to modifiy the mainframe end of it to send the appropiate commands to the Mac. But it might just make life pleasant for us grunts out there in hackerdom.

For More information contact Apple Software licensing at (408) 973-4667 or write a letter to Scully requesting that MacworkStation be made a public standard.

New MacNosy Version 2

Over the past year MacNosy has helped many programmers learn about the Macintosh OS, and the workings of other Mac programs. Meeting some of my users at trade shows has been fun for me. Many of their suggestions have been incorporated in Version 2 [denoted as V2] of MacNosy.

The reasons for V2 of Nosy are the introduction of the 128K ROM's, and the addition of features such as the context sensative symbol substitution discussed below. This was what I started with. By the time I was finsihed coding, the mini editor has been substantially extended to include displays of procedures by double clicking on a procedure name, and the ability to interactively create seperate, mergable comment files had been added.

Nosy Does Windows!

The introduction of the Mac user interface makes Nosy much easier to use. The illustration in figure 1 shows the procedure "browser" window partially obscured by the display of a procedure. The Display menu allows one to bring up windows containing the listing of a procedure, the references to any symbol, the complete reference list of system symbols referenced, the complete reference list of trapnames referenced, the listing of all the strings in the program, the list of code blocks in the program, etc.

Fig. 1 Windows supported

Note that Nosy now lists the formal parameter list with the listing of a trap call, and for I/O calls, it knows that the register A0 holds the address of the parameter block, so in between the defination of A0 and the trap call it substitutes names of the structure variables. For a procedure that creates a stack frame with a "LINK A6" instruction, references of the form -d(A6) are to local variables, and are named "vxx_n", and those of the form d(A6) are the parameters "param1", "param2",... , and if it is a function, the function result is called "funRslt".

Other additions to the Window mode of Nosy are displays of information in its internal tables. They include a list of the structure names known to Nosy, lists of trapnames and their parameter lists, the names and values of the system global symbols, and a file listing most of constant definations for field values (event mask values and such).

Fig. 2 Symbols Displayed

New ROM Secrets

I have had a set of the new ROM's for a few weeks, and in addition to getting Nosy to disassemble them, I have made a few observations about the code in it. About 30K is devoted to resources, and to find out what they are use the "Rsrc map" list in window mode (Chicago font, WDEF0, etc). Other facts of interest are the methods used to speedup BlockMove and the QuickDraw routines. The code in Blockmove is unrolled, that is the loop body has been replicated a number of times to cut down on the number of increment and test instructions. The reason for this is that the 68000 used in the Mac is "bus limited", and anything one can do to cut down the number of instructions executed in a loop will speed it up.

Consider the loop:

    for i := 1 to 20 do a[i] := b[i]; 

by rewriting it as:

   for i := 1 to 20 by 2 do begin
      a[i] := b[i];     a[i+1] := b[i+1]
  end;

We eliminate the execution time associated with 10 increment and test instructions at the cost of extra space by duplicating the assignment statement.

Another interesting tidbit about the new ROM's are that they contain some 68020 instructions. Yes, Nosy knows about the 68020 instructions, and the FPU (68881) co-processor instructions. The new ROM's have been setup to run on a variety of machines as evidenced by some of the new EQU's.

Last November I made a "ROM comments" version of Nosy available along with a comments file that Nosy read in and merged with the disassembly listings it produces. In V2 I have extended this capability so any file can be commented, and provided a way that one can interactively create the comment files in window mode. Another little goodie that was added in conjunction with the comment mode was to "annotate" MOVEQ xx,D0 instructions with a comment of the form "; err = name" if Nosy's symbol dictionary contained an error number for the value.

Copy De-protection Techniques

Another use of Nosy is the location of copy protection code. To prefix this discussion, note that during manufacture (disk duplication), the duplicator writes the disk in a non-standard way by including non-standard data or address markers, or some other devious device so as to make the disk difficult to copy. During the execution of the program it checks the disk for the existance of this "mark", and if it finds it procedes normally. This checking code is usually refered to as copy protection code.

Fortunately for us the program itself cannot be "marked", for if it were, the segment loader could not read it, so Nosy can read the file in, and if the copy protection code can be found, and eliminated, the program is still usable. A number of the facilities in Nosy are useful in the location of copy protection code. The reference maps, lists of the resources ("please insert master disk"), the "Strings" display, the Search Mark command, and the conVert address command. The Search Mark command searchs for references of the form "$D5 ....." which are used to setup the Sony drivers for non-standard reads. If the procedure that references that data area contains references to any of the disk driver variables, then Nosy displays the message "ahoy matey, x marks the spot (base of the copy protection code)", and lists the chain of procedures that call it. One can then inspect the chain of procedures to find a suitable place to patch the code.

Trying to keep up with the changing copy protection methods is a never ending game, as evidenced by the frequent updates to Copy-To-Mac. I have sharpened some of the checks in Nosy so that it doesn't blow up or follow incorrect paths during the treewalk. This was done after I checked out some games, and found that they were putting garbage in the "CODE 0" segment.

More coming...

Other additions to V2 are the support of Desk accessories in Window mode, and the support of Switcher in all modes. Nosy is a continually evolving program to which I have been and will be adding bug fixs and new features. The current version of Nosy may be downloaded from my SIG on Delphi by those who have purchased it. At this time I am not sure what future directions Nosy will take, but some of the things under consideration are:

- to add features to the window mode so as to make it easier to use

- to make it into a debugger

- to add a symbolic simulation of the register contents along with some more flow analysis so it handles languages with register based calling sequences better, and produces a more informative reference map (knows the difference between Loads and Stores).

[MacNosy version 2 is available through the MacTutor store for $85. -Ed]

Fig. 3 "TREF Wind"

 

Community Search:
MacTech Search:

Software Updates via MacUpdate

Dropbox 193.4.5594 - Cloud backup and sy...
Dropbox is a file hosting service that provides cloud storage, file synchronization, personal cloud, and client software. It is a modern workspace that allows you to get to all of your files, manage... Read more
Google Chrome 122.0.6261.57 - Modern and...
Google Chrome is a Web browser by Google, created to be a modern platform for Web pages and applications. It utilizes very fast loading of Web pages and has a V8 engine, which is a custom built... Read more
Skype 8.113.0.210 - Voice-over-internet...
Skype is a telecommunications app that provides HD video calls, instant messaging, calling to any phone number or landline, and Skype for Business for productive cooperation on the projects. This... Read more
Tor Browser 13.0.10 - Anonymize Web brow...
Using Tor Browser you can protect yourself against tracking, surveillance, and censorship. Tor was originally designed, implemented, and deployed as a third-generation onion-routing project of the U.... Read more
Deeper 3.0.4 - Enable hidden features in...
Deeper is a personalization utility for macOS which allows you to enable and disable the hidden functions of the Finder, Dock, QuickTime, Safari, iTunes, login window, Spotlight, and many of Apple's... Read more
OnyX 4.5.5 - Maintenance and optimizatio...
OnyX is a multifunction utility that you can use to verify the startup disk and the structure of its system files, to run miscellaneous maintenance and cleaning tasks, to configure parameters in the... Read more
Hopper Disassembler 5.14.1 - Binary disa...
Hopper Disassembler is a binary disassembler, decompiler, and debugger for 32- and 64-bit executables. It will let you disassemble any binary you want, and provide you all the information about its... Read more

Latest Forum Discussions

See All

Zenless Zone Zero opens entries for its...
miHoYo, aka HoYoverse, has become such a big name in mobile gaming that it's hard to believe that arguably their flagship title, Genshin Impact, is only three and a half years old. Now, they continue the road to the next title in their world, with... | Read more »
Live, Playdate, Live! – The TouchArcade...
In this week’s episode of The TouchArcade Show we kick things off by talking about all the games I splurged on during the recent Playdate Catalog one-year anniversary sale, including the new Lucas Pope jam Mars After Midnight. We haven’t played any... | Read more »
TouchArcade Game of the Week: ‘Vroomies’
So here’s a thing: Vroomies from developer Alex Taber aka Unordered Games is the Game of the Week! Except… Vroomies came out an entire month ago. It wasn’t on my radar until this week, which is why I included it in our weekly new games round-up, but... | Read more »
SwitchArcade Round-Up: ‘MLB The Show 24’...
Hello gentle readers, and welcome to the SwitchArcade Round-Up for March 15th, 2024. We’re closing out the week with a bunch of new games, with Sony’s baseball franchise MLB The Show up to bat yet again. There are several other interesting games to... | Read more »
Steam Deck Weekly: WWE 2K24 and Summerho...
Welcome to this week’s edition of the Steam Deck Weekly. The busy season has begun with games we’ve been looking forward to playing including Dragon’s Dogma 2, Horizon Forbidden West Complete Edition, and also console exclusives like Rise of the... | Read more »
Steam Spring Sale 2024 – The 10 Best Ste...
The Steam Spring Sale 2024 began last night, and while it isn’t as big of a deal as say the Steam Winter Sale, you may as well take advantage of it to save money on some games you were planning to buy. I obviously recommend checking out your own... | Read more »
New ‘SaGa Emerald Beyond’ Gameplay Showc...
Last month, Square Enix posted a Let’s Play video featuring SaGa Localization Director Neil Broadley who showcased the worlds, companions, and more from the upcoming and highly-anticipated RPG SaGa Emerald Beyond. | Read more »
Choose Your Side in the Latest ‘Marvel S...
Last month, Marvel Snap (Free) held its very first “imbalance" event in honor of Valentine’s Day. For a limited time, certain well-known couples were given special boosts when conditions were right. It must have gone over well, because we’ve got a... | Read more »
Warframe welcomes the arrival of a new s...
As a Warframe player one of the best things about it launching on iOS, despite it being arguably the best way to play the game if you have a controller, is that I can now be paid to talk about it. To whit, we are gearing up to receive the first... | Read more »
Apple Arcade Weekly Round-Up: Updates an...
Following the new releases earlier in the month and April 2024’s games being revealed by Apple, this week has seen some notable game updates and events go live for Apple Arcade. What The Golf? has an April Fool’s Day celebration event going live “... | Read more »

Price Scanner via MacPrices.net

Apple Education is offering $100 discounts on...
If you’re a student, teacher, or staff member at any educational institution, you can use your .edu email address when ordering at Apple Education to take $100 off the price of a new M3 MacBook Air.... Read more
Apple Watch Ultra 2 with Blood Oxygen feature...
Best Buy is offering Apple Watch Ultra 2 models for $50 off MSRP on their online store this week. Sale prices available for online orders only, in-store prices may vary. Order online, and choose... Read more
New promo at Sams Club: Apple HomePods for $2...
Sams Club has Apple HomePods on sale for $259 through March 31, 2024. Their price is $40 off Apple’s MSRP, and both Space Gray and White colors are available. Sale price is for online orders only, in... Read more
Get Apple’s 2nd generation Apple Pencil for $...
Apple’s Pencil (2nd generation) works with the 12″ iPad Pro (3rd, 4th, 5th, and 6th generation), 11″ iPad Pro (1st, 2nd, 3rd, and 4th generation), iPad Air (4th and 5th generation), and iPad mini (... Read more
10th generation Apple iPads on sale for $100...
Best Buy has Apple’s 10th-generation WiFi iPads back on sale for $100 off MSRP on their online store, starting at only $349. With the discount, Best Buy’s prices are the lowest currently available... Read more
iPad Airs on sale again starting at $449 on B...
Best Buy has 10.9″ M1 WiFi iPad Airs on record-low sale prices again for $150 off Apple’s MSRP, starting at $449. Sale prices for online orders only, in-store price may vary. Order online, and choose... Read more
Best Buy is blowing out clearance 13-inch M1...
Best Buy is blowing out clearance Apple 13″ M1 MacBook Airs this weekend for only $649.99, or $350 off Apple’s original MSRP. Sale prices for online orders only, in-store prices may vary. Order... Read more
Low price alert! You can now get a 13-inch M1...
Walmart has, for the first time, begun offering new Apple MacBooks for sale on their online store, albeit clearance previous-generation models. They now have the 13″ M1 MacBook Air (8GB RAM, 256GB... Read more
Best Apple MacBook deal this weekend: Get the...
Apple has 13″ M2 MacBook Airs available for only $849 today in their Certified Refurbished store. These are the cheapest M2-powered MacBooks for sale at Apple. Apple’s one-year warranty is included,... Read more
New 15-inch M3 MacBook Air (Midnight) on sale...
Amazon has the new 15″ M3 MacBook Air (8GB RAM/256GB SSD/Midnight) in stock and on sale today for $1249.99 including free shipping. Their price is $50 off MSRP, and it’s the lowest price currently... Read more

Jobs Board

Early Preschool Teacher - Glenda Drive/ *Appl...
Early Preschool Teacher - Glenda Drive/ Apple ValleyTeacher Share by Email Share on LinkedIn Share on Twitter Read more
Senior Software Engineer - *Apple* Fundamen...
…center of Microsoft's efforts to empower our users to do more. The Apple Fundamentals team focused on defining and improving the end-to-end developer experience in Read more
Relationship Banker *Apple* Valley Main - W...
…Alcohol Policy to learn more. **Company:** WELLS FARGO BANK **Req Number:** R-350696 **Updated:** Mon Mar 11 00:00:00 UTC 2024 **Location:** APPLE VALLEY,California Read more
Medical Assistant - Surgical Oncology- *Apple...
Medical Assistant - Surgical Oncology- Apple Hill WellSpan Medical Group, York, PA | Nursing | Nursing Support | FTE: 1 | Regular | Tracking Code: 200555 Apply Now Read more
Early Preschool Teacher - Glenda Drive/ *Appl...
Early Preschool Teacher - Glenda Drive/ Apple ValleyTeacher Share by Email Share on LinkedIn Share on Twitter Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.