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David Cook's latest activity
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David Cook
replied to the thread
Looking for the document "Macintosh Worldwide Development: Guide to System Software"
.
Here is what I’ve learned. Unless noted otherwise, all of this information is based on System 6.0.0 and Inside Macintosh Operating...
Dec 21, 2025
David Cook
replied to the thread
Looking for the document "Macintosh Worldwide Development: Guide to System Software"
.
Bummer. Why didn't they just use a 64-bit integer at that point. It is slightly understandable when the 128K Mac came out. But, by the...
Dec 20, 2025
David Cook
replied to the thread
Mac IIci "It is now safe to switch off your Macintosh"
.
Yes, you're doing the right things. Here is what the traces look like underneath the chips. Turn off power and check that each trace...
Dec 20, 2025
David Cook
replied to the thread
A very special Mac Portable
.
Even better: Do you recognize the board being manufactured?!
Dec 20, 2025
David Cook
replied to the thread
Looking for the document "Macintosh Worldwide Development: Guide to System Software"
.
Thank you. I'm trying to lock down the definitive System release that includes those functions, as well as which structure fields are...
Dec 19, 2025
David Cook
posted the thread
Looking for the document "Macintosh Worldwide Development: Guide to System Software"
in
Software | System Software (68k)
.
I've been researching the Apple system routines that use LongDateTime as part of a potential solution to the 2040 problem. Because it is...
Dec 19, 2025
David Cook
replied to the thread
A very special Mac Portable
.
Each time I let an eBay auction get beyond me (I set a mental price point and don't go over it), I think to myself "Someone else must...
Dec 19, 2025
David Cook
replied to the thread
A very special Mac Portable
.
Just watched it. Besides the usual precise technical information, my favorite thing about your videos is the production quality. Nice...
Dec 18, 2025
David Cook
posted the thread
Apple Desktop Bus Mice and Power Usage
in
Add-ons, Peripherals & Networking
.
On @JDW ’s thread regarding the Macintosh Portable (https://tinkerdifferent.com/threads/powerbook-100-170-owners.4811/), he posted a...
Dec 14, 2025
David Cook
replied to the thread
PowerBook 100 & 170 owners
.
PowerBook 100: 25 mm PowerBook 170: 30 mm
Dec 6, 2025
David Cook
replied to the thread
PowerBook 100 & 170 owners
.
I just did a quick test. The original ADB mouse uses 70 mA (64.8 idle). The low-power ADB mouse uses 4.8 mA (4.65 idle). The low-power...
Dec 5, 2025
David Cook
replied to the thread
PowerBook 100 & 170 owners
.
Only normal, I'm afraid. I'm interested in learning if the long connector has something special in it.
Dec 3, 2025
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