TweetFollow Us on Twitter

July 90 - Letters


I just wanted to let you know that I have found both issues of d e v e l o p to be extremely useful. You do an excellent job in picking up where Inside Macintosh leaves off. I hope Apple continues to publish d e v e l o p for a long time.
-- Paul Higinbotham

Of all the technical journals I receive about the Macintosh, Digital VAX, and computing in general, all pale in comparison to your d e v e l o p . Please send me a copy.
--Steve Salika

In your last issue, Curt Bianchi tells me to beware of how the Memory Manager grabs my Pascal object's handles. Then, in another article, Richard Clark tells me that the Memory Manager has a secret life and that I should be careful when I pass it pointers. My question is, should I ask the Memory Manager to take a blood test before we get serious?
--Concerned in Palo Alto

Although you are right to be cautious about getting serious with the Memory Manager, there is really no need for a blood test. The very articles that you mention present clear guidelines for having safe yet fulfilling, uh, "interactions" with the Memory Manager. These guidelines, judiciously and conscientiously (and enthusiastically!) followed, provide all the protection you will need.
--Dave Johnson

After using both on-line documentation and hard copy for a while, I prefer hard copy. It is easier to read, and more immediate. I like the concept of having complex and interrelated documentation on- line with cross referencing a click away. When you obtain instant response time, on-line documentation will be invaluable.
--Thomas Bernard

Thanks for all the fantastic work on d e v e l o p --I love it, and being an American abandoned in England, it is one of the most informative journals I get over here. I do have a couple of gripes (read, "winges" in England) about the software used to display the articles.

The control panel windoid is a complete pain--it doesn't fit on a 13-inch monitor without obscuring the text window unless you move it halfway off the screen, so you have to be continually moving the panel around the screen. I then decided to print out some of the articles, but that isn't much easier, because you either have to know the page where each article begins, or navigate there one page at a time.

It would be nice to see a control panel which is vertically oriented so that it can fit along with the text window on a 13-inch screen, and to also include a button which jumps to the next article--moving to the first and last pages is not really that useful. I think it would also be much more useful if the text for each page fit in a window rather than having to scroll each window as well as forward each page.
--David L'Heureux

As you know, we're entering an era in the Macintosh world that revolves around electronic publishing. Many of the standards and interfaces that are so well defined in the Macintosh desktop metaphor don't exist when you're creating interactive electronic magazines (Hyperzines). Developer Essentials is a living document. It will continually grow and change as we begin to determine what works (and what doesn't)--things like how you use sound, how and when you should animate an icon, what's the best use of color, where is the best place within the virtual magazine metaphor to put a control panel windoid and have it not be a complete pain. Ya know, things like that.

The reason we've put the automatic feedback capabilities into d e v e l o p is to get your ideas, criticisms, and thoughts. We don't have all the answers and will be experimenting with new ways of representing data. We hope to have more defined and stable human interface standards regarding the use of electronic media like CD-ROM in the near future. In the meantime, look for experimentation, a few mistakes, and some very open minds looking to you for feedback and suggestions here at Apple.

--Scott Converse
Electronic Media Group Manager

Issue 2 of d e v e l o p is great. The articles are fun, informative, and well written. I think you are off to a great start.

But I must strenuously object to your rampant waste of paper for the sake of "design." Almost every page has at least 25 percent white space; many have more. I don't know if you have an aversion to trees or just a lack of concern for our children, but your choice in this matter does not reflect Apple's generally ecological view. Apple is a leader in reducing waste in manufacturing, but you insist on creating waste in your magazine.

Please, please take a look at redesigning your pages for future issues. Apple's publications are often very well designed, but yours is the only one that screams "paper waste" on every page. It is an easy step that will help the whole world.
--Paul Hoffman

I'm looking into using recycled paper for d e v e l o p (in fact, it started out as a requirement for the first issue), but I've run into conflicting information. I recycle my paper (both here at work and at home) and am actively looking for ways to help d e v e l o p fit into the ecological scheme of things. Our printer recycles all of the waste (generated from printer make-ready, and overages), and the paper we print on, like most paper these days, has a recycled component. Some people I've spoken to advocate recycled paper as the answer to all of our problems; others contend that the chemicals used to de-ink the paper damage the environment more than they help to save it. If you've got ideas about whom I could talk to to hear the real scoop on recycled paper (from environmental impact to lasting qualities), I'd love to hear them.

Meanwhile the page design is intended to leave room for notes (which many developers have told me they make), and for readability. The column widths must allow for full-page width code listings but must also work with readable line lengths. I'm sorry that it screams paper waste to you, and I will talk to our designer about ways in which we might adapt the design.

--Louella Pizzuti

When we find technical errors in previous issues of d e v e l o p (or when you point them out to us), we make corrections in the text and code for the current Developer Essentials disc. You can also find corrections in this section of the journal.

So far, we want to let you know about these changes:

On page 75, the abstract should read "Through the Slot Manager system software, the Macintosh can read the declaration ROMs in NuBus slots and processor slots, like those in the Macintosh SE/30. This article tells you what you must know about NuBus addressing and the structure of correct declaration ROMs to successfully debug the ROM. It walks you through the structure of an example declaration ROM and gives common errors and strategies for debugging declaration ROMs."

On page 91, "Assuming the board is in slot $B, the above format block (residing on byte lane 3)" should be byte lane 0.

On page 149, the procedure MyVScrollCallback appears twice. The second one should have been MyHScrollCallback, as indicated in the comments. Thanks to Sam Roberts for pointing this one out. For those of you who didn't even notice, shame on you.

There was a pair of bugs in the "Heap Demo" source code distributed with Issue 2 of develop, one of which prevented the source code from compiling. The Developer Essentials disc contains a corrected version (HeapDemo 1.3.4) In order to compile the old code, you should remove the reference to "UMonitor" at the start of HeapDemo.p. The UMonitor unit is a debugging tool that was used during the final checkout of the Heap Demo, and though I removed the calls to its code, I forgot to remove the USES reference.

The other bug was in the menu enabling logic. With the bug, you could crash the program by closing the memory window, and deleting all blocks. The menu enabling logic has been changed to fix this problem. Thanks to the diligent readers who pointed out these problems. I'll make sure you have more articles to nit-pick in the future!

--Richard Clark

COMMENTS We welcome timely letters to the editor, especially from readers wishing to react to articles that we publish in develop. Letters should be addressed to Louella Pizzuti, 20525 Mariani Ave., M/S 75-3B, Cupertino, CA 95014 (AppleLink Pizzuti1). All letters should include name and company name as well as address and phone number. Letters may be excerpted or edited for clarity and space.

SUBSCRIPTION INFORMATION Use the order form on the last page of the journal. Please address all subscription (and subscription-related) inquiries to

d e v e l o p
Apple Computer, Inc.
P.O. Box 531
Mt. Morris, IL 61054 U.S.A.
AppleLink Address: DEV.SUBS


Community Search:
MacTech Search:

Software Updates via MacUpdate

World of Tanks Generals guide - Tips and...
World of Tanks Generals is a brand new card game by the developer behind the World of Tanks shooter franchise. It plays like a cross between chess and your typical card game. You have to keep in consideration where you place your tanks on the board... | Read more »
TruckSimulation 16 guide: How to succeed...
Remember those strangely enjoyable truck missions in Grand Theft Auto V whereit was a disturbing amount of fun to deliver cargo? TruckSimulation 16 is reminiscent of that, and has you play the role of a truck driver who has to deliver various... | Read more »
The best GIF making apps
Animated GIFs have exploded in popularity recently which is likely thanks to a combination of Tumblr, our shorter attention spans, and the simple fact they’re a lot of fun. [Read more] | Read more »
The best remote desktop apps for iOS
We've been sifting through the App Store to find the best ways to do computer tasks on a tablet. That gave us a thought - what if we could just do computer tasks from our tablets? Here's a list of the best remote desktop apps to help you use your... | Read more »
Warhammer 40,000: Freeblade guide - How...
Warhammer 40,000: Freebladejust launched in the App Store and it lets you live your childhood dream of blowing up and slashing a bunch of enemies as a massive, hulking Space Marine. It's not easy being a Space Marine though - and particularly if... | Read more »
Gopogo guide - How to bounce like the be...
Nitrome just launched a new game and, as to be expected, it's a lot of addictive fun. It's called Gopogo, and it challenges you to hoparound a bunch of platforms, avoiding enemies and picking up shiny stuff. It's not easy though - just like the... | Read more »
Sago Mini Superhero (Education)
Sago Mini Superhero 1.0 Device: iOS Universal Category: Education Price: $2.99, Version: 1.0 (iTunes) Description: KAPOW! Jack the rabbit bursts into the sky as the Sago Mini Superhero! Fly with Jack as he lifts impossible weights,... | Read more »
Star Wars: Galaxy of Heroes guide - How...
Star Wars: Galaxy of Heroes is all about collecting heroes, powering them up, and using them together to defeat your foes. It's pretty straightforward stuff for the most part, but increasing your characters' stats can be a bit confusing because it... | Read more »
The best cooking apps (just in time for...
It’s that time of year again, where you’ll be gathering around the dinner table with your family and a huge feast in front of you. [Read more] | Read more »
Square Rave guide - How to grab those te...
Square Rave is an awesome little music-oriented puzzle game that smacks of games like Lumines, but with its own unique sense of gameplay. To help wrap your head around the game, keep the following tips and tricks in mind. [Read more] | Read more »

Price Scanner via

Cyber Monday: Apple MacBooks on sale for up t...
Apple resellers have MacBook Pros, MacBook Airs, and MacBooks on sale for up to $250 off MSRP for Cyber Monday 2015. The following is a roundup of the lowest prices available for new models from any... Read more
Cyber Monday: 15% off Apple products, and sto...
Use code CYBER15 on Cyber Monday only to take 15% on Apple products at Target, and store-wide. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-... Read more
iPad Air 2 And iPad mini Among Top Five Black...
Adobe has released its 2015 online shopping data for Black Friday and Thanksgiving Day. The five best selling electronic products on Black Friday were Samsung 4K TVs, Apple iPad Air 2, Microsoft Xbox... Read more
All-in-one PC Shipments Projected To Drop Ove...
Digitimes’ Aaron Lee and Joseph Tsai report that all-in-one (AIO) PC shipments may drop a double-digit percentage on-year in 2015 due to weaker-than-expected demand, although second-largest AIO make... Read more
Sprint Offers iPad Pro
Sprint now offers Apple’s new iPad Pro with Wi-Fi + Cellular, featuring a 12.9-inch Retina display with 5.6 million pixels. Customers can pick up iPad Pro at select Sprint retail locations. It can... Read more
Cyber Monday: Target offers 15% discount on A...
Target has discounted Apple Watches by 15% for Cyber Monday. Choose free shipping or free local store pickup (if available). Sale prices for online orders only, in-store prices may vary: - Apple... Read more
Sunday roundup of Holiday weekend Mac sales:...
Take up to $500 off MSRP on the price of a new Mac at B&H Photo today as part of their Black Friday/Holiday weekend sale. Shipping is free, and B&H charges NY tax only. These prices are... Read more
Holiday weekend: Apple Watch on sale for $50-...
B&H Photo has the Apple Watch on sale today for $50-$100 off MSRP. Shipping is free, and B&H charges NY sales tax only: - Apple Watch Sport: $50 off - Apple Watch: $50-$100 off Read more
Holiday weekend: iPad Air 2s on sale for up t...
B&H Photo has iPad Air 2s on sale for up to $80 off MSRP including free shipping plus NY sales tax only: - 16GB iPad Air 2 WiFi: $459 $40 off - 64GB iPad Air 2 WiFi: $569 $30 off - 128GB iPad Air... Read more
Holiday weekend Mac sales roundup: B&H Ph...
B&H Photo continues to have all new Macs on sale for up to $500 off MSRP as part of their Black Friday/Holiday weekend sale. Shipping is free, and B&H charges NY tax only: - 15″ 2.2GHz Retina... Read more

Jobs Board

Technical Program Manager, Strategic Merchant...
# Technical Program Manager, Strategic Merchants - Apple Pay Job Number: 44001177 Santa Clara Valley, Califo ia, United States Posted: Oct. 30, 2015 Weekly Hours: 40.00 Read more
Frameworks Engineer, *Apple* Watch - Apple...
# Frameworks Engineer, Apple Watch Job Number: 41403122 Santa Clara Valley, Califo ia, United States Posted: Jul. 1, 2015 Weekly Hours: 40.00 **Job Summary** Join the Read more
Software Engineer - *Apple* Pay - Apple (Un...
# Software Engineer - Apple Pay Job Number: 44003246 Santa Clara Valley, Califo ia, United States Posted: Nov. 16, 2015 Weekly Hours: 40.00 **Job Summary** Apple Pay Read more
Merchant Operations Manager: *Apple* Pay -...
# Merchant Operations Manager: Apple Pay Job Number: 43593822 Santa Clara Valley, Califo ia, United States Posted: Nov. 10, 2015 Weekly Hours: 40.00 **Job Summary** The Read more
Product Design Engineer - *Apple* Watch - A...
# Product Design Engineer - Apple Watch Job Number: 41727161 Santa Clara Valley, Califo ia, United States Posted: Jul. 22, 2015 Weekly Hours: 40.00 **Job Summary** Read more
All contents are Copyright 1984-2011 by Xplain Corporation. All rights reserved. Theme designed by Icreon.