COMMODORE VIC-20 35KB (27+8) RAM EXPANSION CARTRIDGE

Hello,

This is a tested and working project. (Tested on a NTSC Commodore VIC-20 plugged to a C64 PSU)

COMMODORE VIC-20 35KB (27+8) RAM Expansion Cartridge is an Easy DIY project, all components are through hole, marked on the PCB, Easy to solder, Easy to make ;)

Many thanks to Ruud Baltissen from Netherlands

Details about this Commodore VIC-20 35KB (27+8) RAM Expansion project;

http://www.baltissen.org/newhtm/memv20.htm

Please choose: Edge connector YES and Bevelling Yes (45°)

COMPONENTS:

62256 DIP28 (32KB STATIC RAM)

6264 DIP28 (8KB STATIC RAM) (You can use 62256 or 4364)

74LS21 DIP14

2PCS. DIP28 WIDE IC SOCKET

DIP14 IC SOCKET

8P DIP SWITCH (You can use 2x8 Pin 2.54mm pitch male header and 8pcs. jumper caps)

8 PCS. 1/4 WATT 10K OHM RESISTOR

3 PCS. 100nF CERAMIC CAPACITOR

220 μF 16V ELECTROLYTIC CAPACITOR

RIGHT ANGLE TACTILE BUTTON (For RESET Button)

THIS PCB

If you have a programmer capable of testing IC chips, such as the 74LS series and static RAM chips, you should remember to test them before soldering. Some chips may be defective. (TL866 Minipro Programmer can test some logic ICs and static RAM chips)

In order to protect your electronical devices, always turn off your Commodore before connecting or disconnecting the cables or any other device.

Gerber files can be changed at any time. Before paying for the PCBs, be sure to update your orders!

As you can see I have uploaded many projects and I am still working on new projects. If you have any questions, please look for answers online. Unless I specify explicitly, all my projects are tested and confirmed to work under normal circumstances before being shared. I'm sorry I didn't have enough time to answer all the questions.

Use this PCB at your own risk !

Have fun

Thank you.