Plus Too Files
Since the Plus Too project hasn’t seen any progress in a year, I’m posting all the design files in the hopes that someone else may want to build on what I’ve done. If you missed the earlier discussions about it,…
Tranz 330 Files
I’ve posted an archive containing the original Tranz 330 program file dump, my commented disassembly of the original program, and two versions of the Mozart demo in source and binary form. If you can get your hands on a Tranz…
A New Kind of Video Game Console
A few months ago I posted a long essay on my professional future. Should I try to make a career of BMOW blogging? Find an electronics industry job? Return to video game development? Launch a start-up company? Since then I’ve…
Finally!
The new Floppy Emu prototype is up and running at last! Today I was able to boot a Mac Plus from the new emulator board for the first time. It’s still rough around the edges, but it works. Copy a…
In-System CPLD Programming Using XSVF Files
Floppy Emu has both a microcontroller and a CPLD working in tandem, and both must be programmed in order for the emulator to function. However, I don’t want to require two separate external programmers and the associated port connectors. My…
Procrastinating the Future
Frequent BMOW readers have doubtless noticed the lack of project progress lately. I could claim I’ve been trapped under a piece of heavy furniture, but the truth is I’ve been procrastinating while trying to set a new course for my…
Floppy Emu, Large and In Charge
After months of procrastination, I finally assembled the Floppy Emu board and began work on the firmware modifications this week. So far, so good! Despite being out of practice with soldering, the assembly went smoothly, and the board checked out…
Mouse Freeze Debugging
Last October, Plus Too first booted successfully into the Macintosh Finder. Ever since then, it’s exhibited an intermittent mouse freezing bug. The FPGA Mac replica runs normally for a few minutes, during which the mouse works normally, and it’s possible to exercise menus, run…
Plus Too Interrupt Bug
Mark McDougall (tcdev) discovered what looks like a serious bug in the way Plus Too handles interrupts. It appears my design causes the 68000 CPU to use the wrong interrupt handler vector! How it could work at all under those…
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