After assembling the ROM Emulator using an ATMega and some RAM, I had issues getting it going. I could connect to the emulator using a te...

I've been inflicting my buggy boot code with monitor etc on people, which is making their experiences in building Freebee more diffic...

So it turns out you can emulate a Z80 using a Teensy 4.1. Better yet, with the aid of a few voltage translators on a little interposer bo...

With the latest release of Freebee Fremium, I added circuitry to invert VSYNC. This is useful to convince a multisync monitor (or upscale...

I've spent a week or so of my holidays getting the Freebee Fremium design ready to go out. I am hoping that the changes I've made to...

Late model Microbees generally run at a 3.375 MHz CPU clock. The Peter Broughton 512K OS included a scheme for doubling that to 6.75 MHz,...

Just musing for now, but how cool would it be to make a simple board with a Freebee keyboard, space for a floppy controller, normal bee s...

One of the more irritating features of working with Microbee stuff is that much of the software is copyright, so I can't distribute i...

So I've got some leave, and asked on MSPP if anyone was keen for a Perth Microbee Users Group (MUG) meeting. I have an ulterior motiv...

Back in the nineties I spent a couple of years doing embedded system design, plus developing ISA and EISA cards. We had some cool ...