Happy Mac
Things are starting to warm up now. I’ve successfully booted Plus Too as far as the Happy Mac startup icon! It’s not booting all the way into the Finder yet, but most of the tricky business with the IWM, floppy,…
Category Plus Too
A hardware clone of the classic Macintosh 128K, 512K, 512Ke, and Plus.
Crazy Disk Encoding Schemes
Wow. I expected the details of the Macintosh floppy data encoding to be a bit complex, but this is worse than I expected. I think I finally understand it well enough to duplicate it, but I can’t explain why it…
Mac Floppy Disk Hardware
Ugh, I’ve been going around in circles trying to settle on the best way to add a floppy disk replica to Plus Too. I’ve been thinking about this way too much, and now I’ve got visions of sync bytes dancing in…
Mac Toolbox Mysteries
I’m making slow progress on Plus Too, unraveling the mysteries of the Mac’s operation little by little. I haven’t really worked on the IWM and floppy components yet, because I’ve been consumed with chasing down other details, and trying to…
Question Mark Disk
Now I’m really getting somewhere with Plus Too: it’s the “question mark disk” screen! If you ever owned a Macintosh with no hard drive, you’ll be very familiar with this screen, because it was shown whenever the computer was turned…
Sad Mac
I’m working with my Xilinx Spartan 3A FPGA board for the moment, and I’ve finally made some visible progress. I’ve never been so happy to see a Sad Mac! A boot failure may not seem very exciting, but I’m thrilled that…
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