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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...
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Plus Too – Hello World!
Plus Too works! Holy cow, it really works. Hot damn! I didn’t want to tackle SD card loading yet, so the GCR-pre-encoded 800K disk image resides in ROM, just above the Macintosh ROM image. The floppy...
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A Working Hardware Replica of the Mac Plus
Plus Too is a home-made replica of a classic Macintosh computer using an FPGA. The project reached a major milestone yesterday, booting to the Finder for the first time, and running several programs....
View ArticlePlus 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...
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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,...
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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...
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Plus Too Mac Replica, New Progress!
After a long hiatus, there’s new progress for the Plus Too FPGA-based Macintosh replica. Till Harbaum has ported my original, unfinished design to the MiST board, and has begun making fixes and...
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