PLA replacement for Commodore 64 Fully Tested GAL PLA 906114-01 Equivalent

Description: EACH BOARD IS COMPLETELY ASSEMBLED, TESTED AS A UNIT IN A COMMODORE 64 Designed by Daniël Mantione - PCB board was purchased from PCBWay with a percentage going to designer. Sent well packaged on anti-ESD foam in an anti-ESD bag Does Super-Zaxxon work?Yes, it does work perfectly! Super-Zaxxon switches banks by means of accesses to the address lines of the C64 and as such, noise on the C64 address lines can cause undesired bank switches. This is a particular concern for EPROMs, which are known to cause switching noises on address changes. The way the GAL20V8 works, with and AND array and an OR array just like the original PLA, this kind of noise is not expected and indeed, the cartridge works perfectly. Can I use an alternate KERNAL? Yes! An alternate KERNAL cartridge is a real PLA torture, because a KERNAL cartridge changes the C64 mode two times within a half cycle and thus likes a responsive PLA. This has been tested both with the 1541 Ultimate II and with the Easyflash 3 and works perfectly. Does it work in all C64 mainboards? Yes, except for the short board assy 250469 of course, because it uses a completely different type of chip. Assy 326298, 250407, 250425, 250466, 251103 (SX64) and C64 Reloaded MK1 have been tested. Both PAL and NTSC tests have been done. Does Epyx Fastload work? Yes, it works fine. The Epyx Fastload cartridge is a rather questionable design that performs analog tricks on digital lines. In order for the Epyx Fastload to work, a PLA needs to have similar analog properties and be stable at the border voltage between 0 and 1. This is the case for the GAL20V8 READY FOR FREE IMMEDIATE SHIPMENT FROM THE USA!

Price: 14.5 USD

Location: Greenwell Springs, Louisiana

End Time: 2024-01-20T01:17:28.000Z

Shipping Cost: 0 USD