Month January 2012

Control Panel on Plus Too

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…

Bare Floppy Emu PCB in a hand

Ready to Assemble

It took longer than I’d expected, but all the parts needed to build three Floppy Emus have finally arrived! That’s three custom-made circuit boards from Dorkbot PDX, plus the SD card sockets, CPLDs, AVRs, and a whole pile of buttons,…

Priority Mail box

Parts Order By Mail

Today I ordered the parts needed to build three Floppy Emu boards, the Macintosh floppy disk drive emulator. Everything should be here by next week, so I can start building! In these small quantities, the total cost for the parts…