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Dog Cow

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  1. Yes, I think that is a correct understanding. If you implement Apple's documented ENET driver interface, then your driver will be compatible with AppleTalk Phase 2 as well as MacTCP.
  2. Do refer to the AppleTalk chapter in Inside Macintosh volume VI for the standard driver interface, if you are not already aware of it.
  3. I think that if you review the AppleTalk chapter in Inside Macintosh volume VI you'll find some discussion on the .ENET and .ENET0 drivers which would be applicable.
  4. Are you sure the clicking is coming from the speaker? The power supply will click when there's no load on it. Here's a good starting point: Replacing the Flyback Transformer. Also be sure to turn on your sound and watch the two QuickTime movies which are listed in the Comments at the bottom of that page. If you make a similar movie of your Mac 128K, we can get a lot more information about this problem.
  5. I do, and I documented my investigation and repair here: Fixing a Mac 512K with Intermittent Black Screen
  6. Hard drives of the time (and still today of course) were engineered to be able to run continuously for months on end. But there are different factors at play now because this equipment is 25, 30+ years old. I'll leave my compact Macs on for long periods, unattended, but only if I'm still awake and in the house. Yes, I turn down the brightness. If I leave the house, I switch them off. When I go to sleep, I switch them off. The concern is that a RIFA safety capacitor blows up, or a flyback transformer blows up, or some other component melts down and causes a problem with
  7. There's a small detail missing here: the Segment Loader does not unilaterally unload (purge) segments. According to Inside Macintosh, it will only purge a segment by an application's directive: when an application calls UnloadSeg for a particular segment. UnloadSeg marks the segment as unlocked and purgable in the heap. But it won't actually be purged unless more heap memory is needed. As far as PowerPC code fragments, so long as Virtual Memory is active, these are never truly loaded or purged from the heap in the sense of how things were done under 68K systems. Instead, Virtual Me
  8. Error 41 usually means "can't load the Finder" typically because the Finder file is missing from the blessed System Folder. But you might see that error if the Finder is present, but can't be loaded into RAM for some other reason.
  9. They say you're not supposed to use dish soap when you wash a board. But if you do a thorough rinse job, you're probably OK.....
  10. I don't believe this is a correct description of how the Mac operating system works. Under a 68K-only system, the Segment Loader will typically only load CODE resource 0 (the jump table) and CODE resource 1 (the main segment) into the application heap when you launch an application. If the application has additional CODE segments (and many applications do), they won't be loaded at launch time unless the preload flag is set. Under a PowerPC system, the PowerPC instructions are stored in the data fork of the application file, and not in CODE resources. The Process Manager
  11. The original series LaserWriter uses a Canon marking engine.
  12. Beta 5 is now out for testing. Features the first real TCP/IP application, a prototype POP3 email client. It logs in and downloads messages and saves them as text files on your disk. Email me if you'd like to beta test.
  13. Yup. But I don't have a 512k schematic, so that should have a 'for what it is worth' rider. Here's the followup from some research I did, because I'm not an expert on all things, and I am still learning. The Sony Sound chip was new with the Macintosh Plus and Macintosh SE. The original Macintosh logic board has an Analog Sound Generator chip. From its pinouts found in this schematic, it does not appear to interface with the 68000's reset line.
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