TweetFollow Us on Twitter

Mar 95 Tips
Volume Number:11
Issue Number:3
Column Tag:Tips & Tidbits

Tips & Tidbits

By Scott T Boyd, Editor

Note: Source code files accompanying article are located on MacTech CD-ROM or source code disks.

TIP OF THE MONTH

Set Breakpoints In ROM

About a year ago I wrote a little control panel called AV Turbo ROM. What it does is set an undocumented bit in PRAM that the ROMs of Power Macs and AV class machines (840AV and 660AV) check upon restart. If the bit is set, the ROM is copied down into RAM.

While this may or may not speed up things a little (I’ve listened to several people debate this issue), that’s not why I wrote it. I wrote it because now that the ROM code is in RAM, I can set breakpoints in “ROM” code. This is very handy when debugging or for those times when you are wondering, “how does that work?”

There are a few gotchas to be aware of:

1) Now that the ROM is in RAM, RAM Doubler from Connectix and The Debugger from Jasik Designs won’t work because they expect the ROM code to be where it’s supposed to be. Sorry about that, but remember that AV Turbo ROM is simply a tool to be used in special circumstances, and it’s quite reasonable to expect system products of their nature to make certain assumptions about the ROM.

2) Restarting on a PowerMac sometimes doesn’t work. Here’s the workaround - just hit the reset button again; it usually works the second time.

3) Since the ROM can be written to now, errant code could trash things. It’s too bad that The Debugger can’t help out with it’s memory protection technology, but sometimes it’s worth making the tradeoff.

I’ve been running this for a year and haven’t had any problems, just lots of fun walking through the ROMs. AV Turbo ROM is available on most online services. Here’s one place to get it:

ftp://freebsd.cdrom.com:/.13/mac/umich/system.extensions/cdev/avturborom1.0.cpt.hqx

Another Quick Tip

Do you use TMON Pro? Do you know about trap record? If not, find out. It’s a very useful debugging tool if you are debugging code other than your own.

- Steve Kiene, mindvision@mindvision.com

Copy Bits Quicker

If you are using custom color palettes in combination with lots of calls to CopyBits, you can speed up your graphics routines by making sure that the ctSeed of both the source and destination PixMap’s color tables are the same.

If the ctSeed values are different, QuickDraw will map each color in the source color table to colors in the destination color table, slowing down the CopyBits operation. If the ctSeed values are the same, QuickDraw will assume that both PixMaps use the same color table, and it will simply copy the bits directly. This has the disadvantage that if the palettes are completely different, you will end up with the wrong colors in the destination.

- Jeremy Vineyard, jeremyv@farallon.com

Hey, Finder, Pay Attention!

I have run into several things which change a file’s creator, but the finder doesn’t update the file’s icon right away. The user often has to close and reopen the Finder window to get the proper icons to appear. If your application needs to fiddle with a file’s creator type or other attributes, you can solve the above problem by changing the ioDrMdDat field of your file’s parent directory. This “tricks” the Finder into updating the window.

void ForceFinderToUpdateFileIcon(
 FSSpecPtr theFile) 
{
CInfoPBRectempPB;

if(theFile != 0L)
 {
 tempPB.dirInfo.ioNamePtr = 0L;
 tempPB.dirInfo.ioVRefNum=theFile->vRefNum;
 tempPB.dirInfo.ioFDirIndex = -1;
 tempPB.dirInfo.ioDrDirID = theFile->parID;

 if(PBGetCatInfoSync(&tempPB) == noErr) 
 {
 tempPB.dirInfo.ioDrMdDat = LMGetTime();
 tempPB.dirInfo.ioDrDirID = theFile->parID;
 PBSetCatInfoSync(&tempPB);
 }
 } 
}

- Craig Marciniak
TemplarDev@aol.com

Hot Tip for Hot Keys

One of the things I appreciate in applications is the ability to select buttons with keystrokes (the keyboard shortcut is known as a hotkey). The following code example adds hotkey functionality to alert dialogs and can be easily added to modal dialogs. The next time you use an alert, add AlertKeyProc to the function and you will have instant hotkey functionality. Simply change

 CautionAlert(ALERT_ID, NIL) 

to

 CautionAlert(SAVE_ALERT_ID, AlertKeyProc)
 
#include <Dialogs.h>
#define kEnterKey               3
#define kReturnKey              13
#define kEscapeKey              27

pascal Boolean AlertKeyProc(DialogPtr theDialog, 
  EventRecord *e, short *itemHit)
{
   char         theChar;
   short        num, i, iType;
   Handle       iHandle;
   Rect         iRect;
   Str255       iText;
   long         finalTicks;
 
   switch( e->what )
   {
      case keyDown:
      case autoKey:
         theChar = (e->message & charCodeMask);
         if(theChar == kReturnKey || theChar == kEnterKey)
         {
            *itemHit = 1;
            return( TRUE );
         }
         else if(theChar == kEscapeKey)
         {
            *itemHit = 2;
            return( TRUE );
         }
         else
         {
            num = CountDITL( theDialog );
            for(i=0; i<num; i++)
            {
               GetDItem(theDialog, i, &iType, &iHandle, &iRect);
               if(iType == ctrlItem + btnCtrl)
               {// If the button is a push button
                  GetCTitle((ControlHandle )iHandle, iText);
                  if(theChar == iText[1] || 
                     theChar == tolower(iText[1]))
                  {
                     *itemHit = i;
                     HiliteControl((ControlHandle )iHandle, 1);
                     return( TRUE );
                  }
               }
            }
         }
         break;
   }
   return( FALSE );
}

- Jeff Beeghly, jbeeghly@u.washington.edu

 
AAPL
$97.67
Apple Inc.
+0.64
MSFT
$44.50
Microsoft Corpora
+0.10
GOOG
$589.02
Google Inc.
-4.33

MacTech Search:
Community Search:

Software Updates via MacUpdate

TinkerTool 5.3 - Expanded preference set...
TinkerTool is an application that gives you access to additional preference settings Apple has built into Mac OS X. This allows to activate hidden features in the operating system and in some of the... Read more
Audio Hijack Pro 2.11.0 - Record and enh...
Audio Hijack Pro drastically changes the way you use audio on your computer, giving you the freedom to listen to audio when you want and how you want. Record and enhance any audio with Audio Hijack... Read more
Intermission 1.1.1 - Pause and rewind li...
Intermission allows you to pause and rewind live audio from any application on your Mac. Intermission will buffer up to 3 hours of audio, allowing users to skip through any assortment of audio... Read more
Autopano Giga 3.6 - Stitch multiple imag...
Autopano Giga allows you to stitch 2, 20, or 2,000 images. Version 3.0 integrates impressive new features that will definitely make you adopt Autopano Pro or Autopano Giga: Choose between 9... Read more
Airfoil 4.8.7 - Send audio from any app...
Airfoil allows you to send any audio to AirPort Express units, Apple TVs, and even other Macs and PCs, all in sync! It's your audio - everywhere. With Airfoil you can take audio from any... Read more
Microsoft Remote Desktop 8.0.8 - Connect...
With Microsoft Remote Desktop, you can connect to a remote PC and your work resources from almost anywhere. Experience the power of Windows with RemoteFX in a Remote Desktop client designed to help... Read more
xACT 2.30 - Audio compression toolkit. (...
xACT stands for X Aaudio Compression Toolkit, an application that encodes and decodes FLAC, SHN, Monkey’s Audio, TTA, Wavpack, and Apple Lossless files. It also can encode these formats to MP3, AAC... Read more
Firefox 31.0 - Fast, safe Web browser. (...
Firefox for Mac offers a fast, safe Web browsing experience. Browse quickly, securely, and effortlessly. With its industry-leading features, Firefox is the choice of Web development professionals... Read more
Little Snitch 3.3.3 - Alerts you to outg...
Little Snitch gives you control over your private outgoing data. Track background activityAs soon as your computer connects to the Internet, applications often have permission to send any... Read more
Thunderbird 31.0 - Email client from Moz...
As of July 2012, Thunderbird has transitioned to a new governance model, with new features being developed by the broader free software and open source community, and security fixes and improvements... Read more

Latest Forum Discussions

See All

Reddme for iPhone - The Reddit Client (...
Reddme for iPhone - The Reddit Client 1.0 Device: iOS iPhone Category: News Price: $.99, Version: 1.0 (iTunes) Description: Reddme for iPhone is an iOS 7-optimized Reddit client that offers a refreshing new way to experience Reddit... | Read more »
Jacob Jones and the Bigfoot Mystery : Ep...
Jacob Jones and the Bigfoot Mystery : Episode 2 1.0 Device: iOS Universal Category: Games Price: $1.99, Version: 1.0 (iTunes) Description: Jacob Jones is back in Episode 2 of one of Apples 'Best of 2013' games and an App Store... | Read more »
New Trailer For Outcast Odyssey, A New K...
New Trailer For Outcast Odyssey, A New Kind of Card Battler Posted by Jennifer Allen on July 25th, 2014 [ permalink ] Out this Fall is a new kind of card battle game: Outcast Odyssey. | Read more »
Garfield: Survival of the Fattest Coming...
Garfield: Survival of the Fattest Coming to iOS this Fall Posted by Jennifer Allen on July 25th, 2014 [ permalink ] Who loves lasagna? Me. Also everyone’s favorite grumpy fat cat, Garfield. | Read more »
Happy Flock Review
Happy Flock Review By Andrew Fisher on July 25th, 2014 Our Rating: :: HERD IT ALL BEFOREUniversal App - Designed for iPhone and iPad Underneath the gloss of Happy Flock’s visuals is a game of very little substance. It’s cute, but... | Read more »
Square Register Updates Adds Offline Pay...
Square Register Updates Adds Offline Payments Posted by Ellis Spice on July 25th, 2014 [ permalink ] Universal App - Designed for iPhone and iPad | Read more »
Looking For Group – Hearthstone’s Curse...
For the first time since its release (which has thankfully been a much shorter window for iPad players than their PC counterparts), Blizzard’s wildly successful Hearthstone: Heroes of Warcraft CCG is sporting some brand new content: the single... | Read more »
Poptile Review
Poptile Review By Jennifer Allen on July 25th, 2014 Our Rating: :: SIMPLY FUNUniversal App - Designed for iPhone and iPad Simple yet a little bit glorious, Poptile is a satisfying entertaining puzzle game with oodles of the ‘one... | Read more »
Modern Combat 5: Blackout Review
Modern Combat 5: Blackout Review By Brittany Vincent on July 25th, 2014 Our Rating: :: LESS QQ, MORE PEW PEWUniversal App - Designed for iPhone and iPad The fifth entry into the blockbuster Modern Combat series is what mobile... | Read more »
Watch and Share Mobile Gameplay Videos W...
Watch and Share Mobile Gameplay Videos With Kamcord Posted by Jennifer Allen on July 25th, 2014 [ permalink ] iPhone App - Designed for the iPhone, compatible with the iPad | Read more »

Price Scanner via MacPrices.net

Apple’s 2014 Back to School promotion: $100 g...
 Apple’s 2014 Back to School promotion includes a free $100 App Store Gift Card with the purchase of any new Mac (Mac mini excluded), or a $50 Gift Card with the purchase of an iPad or iPhone,... Read more
iMacs on sale for $150 off MSRP, $250 off for...
Best Buy has iMacs on sale for up to $160 off MSRP for a limited time. Choose free home shipping or free instant local store pickup (if available). Prices are valid for online orders only, in-store... Read more
Mac minis on sale for $100 off MSRP, starting...
Best Buy has Mac minis on sale for $100 off MSRP. Choose free shipping or free instant local store pickup. Prices are for online orders only, in-store prices may vary: 2.5GHz Mac mini: $499.99 2.3GHz... Read more
Global Tablet Market Grows 11% in Q2/14 Notwi...
Worldwide tablet sales grew 11.0 percent year over year in the second quarter of 2014, with shipments reaching 49.3 million units according to preliminary data from the International Data Corporation... Read more
New iPhone 6 Models to Have Staggered Release...
Digitimes’ Cage Chao and Steve Shen report that according to unnamed sources in Apple’s upstream iPhone supply chain, the new 5.5-inch iPhone will be released several months later than the new 4.7-... Read more
New iOS App Helps People Feel Good About thei...
Mobile shoppers looking for big savings at their favorite stores can turn to the Goodshop app, a new iOS app with the latest coupons and deals at more than 5,000 online stores. In addition to being a... Read more
Save on 5th generation refurbished iPod touch...
The Apple Store has Apple Certified Refurbished 5th generation iPod touches available starting at $149. Apple’s one-year warranty is included with each model, and shipping is free. Many, but not all... Read more
What Should Apple’s Next MacBook Priority Be;...
Stabley Times’ Phil Moore says that after expanding its iMac lineup with a new low end model, Apple’s next Mac hardware decision will be how it wants to approach expanding its MacBook lineup as well... Read more
ArtRage For iPhone Painting App Free During C...
ArtRage for iPhone is currently being offered for free (regularly $1.99) during Comic-Con San Diego #SDCC, July 24-27, in celebration of the upcoming ArtRage 4.5 and other 64-bit versions of the... Read more
With The Apple/IBM Alliance, Is The iPad Now...
Almost since the iPad was rolled out in 2010, and especially after Apple made a 128 GB storage configuration available in 2012, there’s been debate over whether the iPad is a serious tool for... Read more

Jobs Board

WW Sales Program Manager, *Apple* Online St...
**Job Summary** Imagine what you could do here. At Apple , great ideas have a way of becoming great products, services, and customer experiences very quickly. Bring Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
*Apple* Solutions Consultant (ASC) - Apple (...
**Job Summary** The ASC is an Apple employee who serves as an Apple brand ambassador and influencer in a Reseller's store. The ASC's role is to grow Apple Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.