Check the listing for details. 🇬🇧 Commodore VIC-20 Memory expansion PCB, configurable up to 35K. Condition: New. Listed at 5.26 USD. Commodore VIC-20 Memory expansion PCB, configurable up to 35K This is a custom PCB based on the schematic from Ruud Baltissen http://www.baltissen.org/images/mem-exp.png DIP Switch Settings:all off - Expansion Disabled3 ON - 4607 free1,2,3 ON - 6655 free4 ON - 11775 free4,5 ON - 19967 free4,5,6 ON - 28159 freeAll ON - 35kWarning: Do not plug/unplug any expansion card while the computer is on. You risk damaging the computer and the expansion card The PCB connects to the expansion slot and by selecting various jumpers you can enable up to 35Kb of memory for your Commodore VIC-20. This listing is for the PCB only. You will need to supply your own components and assemble. See my other listings for full assembled version. Parts you will need to supply yourself:IC1 - HY62256, 32kbyte static RAMIC2 - HY6264IC3 - 74LS21RN1 - 8 way resistor network 10KSW1 - 8 way DIP switch For more information on using see my blog: https://blog.gjmccarthy.co.uk/commodore-vic-20-expansion/ Please contact me if you have any queries and I will be only too happy to answer them. Many thanks for checking out my items. Visit my store