Set the "T" switch on the shelf next to the programmer to your computer. There is a fan underneath the EMP-20 programmer that must have proper clearance to prevent overheating. Please make sure all ...

It’s amazing what you can do with an old CPU (6809), some SRAM, a controller-interface chip, and an EPROM for your BASIC. Check out the GitHub for the computer’s PCB files if you want to make ...

It refers to a type of computer memory that stores data permanently ... To erase the data, the EPROM chip is exposed to ultraviolet (UV) light, which clears the charge from the floating gates ...

Maybe that’s why you can still get Z80-derived chips readily. There was one thing, though, you needed an EPROM or some other way to run some initial code to bootstrap your system. Zilog knew ...