Can you replace your C64 PLA for under $3?

Bad PLA chips (MOS 906114-01) are a super common problem for the "breadbin" Commodore 64 machines. There are replacements around but they aren't that cheap. How about one you can build yourself at home for under $3? The GAL-PLA has been tested on longboard PCB 326298, 250407, 250425 and the SX64 with no compatibility issues or modifications required. Tested with Super Zaxxon, 1541 Ultimate II and Easy Flash 3 with no issues on both NTSC and PAL machines. 0:00 - GAL-PLA Overview 10:57 - Testing the GAL-PLA with Super Zaxxon 13:45 - How to build your own PLA 25:43 - Cost breakdown of the GAL-PLA replacement --- Video Links ** GAL-PLA Website by Daniël Mantione: (All of the information and files to build your own) ** http://www.freepascal.org/~daniel/c64... The "PLAin" Truth About the Commodore 64 PLA (and why MOS PLA chips fail so often)    • #10 'The PLAin Truth About the Commodore 6...   More information on the PLA including timing requirements: ftp://ftp.zimmers.net/pub/cbm/c64/firmware/C64_PLA_Dissected.pdf Super Zaxxon Cart provided by Geek With Social Skills:    / geekwithsocialskills   --- Parts for this project PCBWay to the GAL-PLA project: https://www.pcbway.com/project/sharep... TL866-II Mini Pro Programmer: https://www.aliexpress.com/item/40000... Lattice GAL20V8 (Qty 10): https://www.aliexpress.com/item/33023... PIN headers: https://www.aliexpress.com/item/32692... 24 pin narrow sockets: https://www.aliexpress.com/item/32950... --- Tools Deoxit D5: https://amzn.to/2VvOKy1 http://store.caig.com/s.nl/it.A/id.16... Jonard Tools EX-2 Chip Extractor: https://amzn.to/2VazxDS https://www.jonard.com/Products/EX-2-... Wiha Chip Lifter: https://amzn.to/3a9ftWw https://www.wihatools.com/precision-c... O-Ring Pick Set: (I use these to lift chips off boards) https://amzn.to/3a9x54J Elenco Electronics LP-560 Logic Probe: https://amzn.to/2VrT5lW Hakko FR301 Desoldering Iron: https://amzn.to/2ye6xC0 Rigol DS1054Z Four Channel Oscilloscope: https://www.rigolna.com/products/digi... Head Worn Magnifying Goggles / Dual Lens Flip-In Head Magnifier: https://amzn.to/3adRbuy TL866II Plus Chip Tester and EPROM programmer: (The MiniPro) https://amzn.to/2wG4tlP https://www.aliexpress.com/item/33000... TS100 Soldering Iron: https://amzn.to/2K36dJ5 https://www.ebay.com/itm/TS100-65W-MI... EEVBlog 121GW Multimeter: https://www.eevblog.com/product/121gw/ DSLogic Basic Logic Analyzer: https://amzn.to/2RDSDQw https://www.ebay.com/itm/USB-Logic-DS... Magnetic Screw Holder: https://amzn.to/3b8LOhG https://www.harborfreight.com/4-inch-... Universal ZIP sockets: (clones, used on my ZIF-64 test machine) https://www.ebay.com/itm/14-16-18-20-... RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI) http://www.retrotink.com/ Plato (Clone) Side Cutters: (order five) https://www.ebay.com/itm/1-2-5-10PCS-... Heat Sinks: https://www.aliexpress.com/item/32537... Little squeezy bottles: (available elsewhere too) https://amzn.to/3b8LOOI --- Links My GitHub repository: https://github.com/misterblack1?tab=r... Commodore Computer Club / Vancouver, WA – Portland, OR – PDX Commodore Users Group https://www.commodorecomputerclub.com/ --- C64 Stuff JaffyDOS: http://blog.worldofjani.com/?p=3544 C64 Test Harness I use:    • Building a Commodore 64 Diagnostic Test Ha...   C64 Homebrew cartridge PCB: (used for the DeadTest / Diag Cart I use) https://www.ebay.com/itm/Commodore-64... EasyFlash 3 Multi-Cart: http://store.go4retro.com/easyflash-3/ --- Instructional videos My video on damage-free chip removal:    • How to remove chips without damaging the c...   --- Music Intro music by: Nathan Divino @itsnathandivino Outro Music: Abyss by | e s c p | https://escp-music.bandcamp.com Music promoted by https://www.free-stock-music.com Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/... --- Image Credits TI99 Image Credit: By Rama & Musée Bolo - Own work, CC BY-SA 2.0 fr https://commons.wikimedia.org/w/index...