Drop-in replacements for the rare/expensive MOS 6550 SRAM as used in Commodore PET 2001 computers. Comes as a DIY kit with SMD parts pre-soldered. You just need to solder the included pin headers.

2018年2月24日 · Commodore PET 2001, PCB 320008, S/N 1006088 How to deal with MOS MPS6550 static RAMs, testing and replacement, and MPS6540 ROMs. PET 2001 test code:...more.

The venerable MOS Technology 6502 microprocessor, in its modern guise, is the W65C02S, supplied by fabless semiconductor company Western Design Center, Inc and distributed by Mouser Electronics. WDC specialise in 65xx-brand microprocessor technology and additionally supply the W65C21N and W65C22N, which are, for all practical purposes here,

Modern replacement for the MOS 6550 1kbx4 SRAM. Contribute to go4retro/Nu6550 development by creating an account on GitHub.

This is a modern replacement for the 6550 RAM Chip (1Kb x 4) and allows you to replace the MPS 6550 RAM chip found in the Commodore PET 2001 with a modern equivalent which uses less power and less prone to issues.

2024年6月16日 · Read all about the MOS 6550 RAM chip here - http://blog.tynemouthsoftware.co.uk/2024/06/mos-6550-ram-chips.html. TLDR: They fail, overheat and start to damage other parts on the boards. If you have a board with 6540s and 6550s, I would strongly recommend removing them and using a PET ROM/RAM board instead.

Find many great new & used options and get the best deals for Vintage Commodore Pet 2001 RAM Chip MOS MPS 6550 Untested as Is at the best online prices at eBay! Free shipping for many products!

2011年1月7日 · 6550 is an ODD duck that was produced for a very short time and it has clock signals to synchronize it. It's very difficult to find and took me 6 months of scouring to find the 5 I have here.