price: 30 GBP platforms: C16,Plus4
convert the unreliable 8501 processor fitted to the Commodore 16 and Plus 4 to the more reliable, cheaper and widely available 6510, as fitted to the Commodore 64.
The newer version of this board plugs into the Plus 4 without soldering. The Plus 4 version is currently available complete with 6510 and kernel ROM.
PAL system only. Certain things may not work such as stopping the tape and turbo disk loaders.
Find out more / buy at: https://rover.ebay.com/rover/1/710-53481-19255-0/1?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fitm%2FCommodore-Plus-4-8501-CPU-replacement-board-and-EPROM%2F154267799434&campid=5338662899&toolid=10001&customid=