Dr. Scott Baker made the ET-3404 6809 adapter clone: I’ve become somewhat of a Heathkit ET-3400 enthusiast lately, after building my ETA-3400 memory/io clone. I decided to also clone the ET-3404, which is a 6809 adapter board for the ET-3400. Why? Simply for completeness sake. The official “experiments” for the ET-3404 aren’t all that exciting, […]
Tag Archives: clone
Cloning a 6502 Apple-1 in just 930 logic gates
Turning 930 logic gates into a working 6502 Apple-1 clone: Two years ago, the Gigatron arrived on the retrocomputing scene. It needs just 930 logic gates (packed into 33 standard 7400-series ICs) to create a computer that beat ‘complex’ 1980s home computers like the VIC-20 in terms of both CPU power and graphics. Without microprocessor, […]
Yellowstone: Cloning the Apple II Liron
Steve writes: FPGA-based disk control for Apple II is finally working! Six months ago, I began designing a universal disk controller card for the Apple II family. Apple made a bewildering number of different disk controller cards in the 1970s and 80s, and my hope was to replace the IWM chip (Integrated Wozniak Machine) and […]
A Line-us clone
Barton Dring has a nice build log on his Line-us clone project: I have been going to the monthly Amp Hour, Hardware Happy Hour meetup. A lot of people bring something to show. My projects are too big. Also, you need to bring your own power. The meetup standard seems to be running off a USB cord. I […]
DIY Arduino Leonardo clone
Here (machine translation) is a DIY single-layer version of the Arduino Leonardo. The blogger goes into detail on how to build one yourself. Everything is covered from preparing and etching your own DIY board, to fine pitch soldering of the ATmega32u4 IC. Once you have built your board, they show you how to upload a […]
Another PICkit2 clone
Arup built a PICkit2 clone, to get it to work, he previously had to build a JDM2 serial port programmer to upload firmware into the PICKIT2 onboard PIC18F2550. I have built Ian’s JDM2 programmer and the same PK2clone from same site, but in both cases I used etched boards. I had to make a PK2 for […]
Bus Pirate: Micro clone
Greeeg developed a micro board for the Bus Pirate v3. He has shrunken the PCB down to 4cmX2.6cm. Instead of using the FT232R chip originally in the Bus Pirate, he has delegated the USB communication to a PIC18F14k50 uC. PCB and schematic files are available, and firmware is currently under development. Via the forum. Get […]
Building a classic Mac hardware clone
Build a Classic Mac clone, a plan for everything but the disk drives: The classic Mac hardware clone seems almost doable, except for the floppy drive. Without a working floppy drive (or equivalent), the Mac clone would do nothing but boot up to the screen showing a disk with a question mark (remember that one?), […]