Kernal switcher for the C64/C64C/C128. Contribute to bwack/C64-Switchless-Multi-Kernal-27C256-adapter development by creating an account on GitHub.

The RAM — all 32K — is in a SMD package to make it fit, but the board also sports a 27C256 EPROM which means that chip and the CPU take up most of the PCB. As you might expect, there’s not ...

I'm using Intel D27C256 which doens't appear in the list, so I'll use the closest match (generic "27C256@DIP28") Start by seeing if you can talk to minipro using check.py.

The DS1267S100 100k digital potentiometer and 27C256 ROM are still available, but with a slightly different part number. Total cost of the BOM, at the time of making, was around 31€ for 70 components.

Going through our archives we discovered that it’s been almost ten years since we published an EPROM emulator. The version we propose in this article should meet today’s demands of hobbyists wishing ...

The project creates a Z80 computer which provides the possibility of producing a video board that utilizes TV as the monitor. There are two boards, CPU and video, that comprise the machine and a ...

[Konstantin] had some extra 27C256 EPROMS lying around and decided to use them to animate an 8×8 LED matrix. He’s not only using them to store data, but driving the display with them as … ...