The PLA chip is one of the most common faults in C64 and this is a modern replacement for that chip. it will fit in any longboard C64 (Assy 326298, 250407. 250425 and 250466).
Make sure your PLA is socketed otherwise you will first have to desolder the old chip and install a socket.
These are original and genuine N82S100N made by SIGNETICS factory programmed in order to use on your C64 Perfect replacement for your faulty MOS 906114-01.
These ICs are very rare to find out and maybe these are the last parts available.
Original and genuine MOS 6526A from new old stock (NOS). They are usually found online as "used" but these chips are part of a new stock withdrawn in the years 1988/1990 from Commodore Semiconductor Systems factory. I guarantee that these chips are really NOS and I also attach in the photo the import tag of the parent company with the relevant production lot.
All the CHIPS are from the same batch (4286 206A).
PLS100N (PHILIPS) is pin to pin interchangeable with all original C64 PLA (for example MOS 906114-01 or Signetics N82S100). These PHILIPS PLS100N are NOS (new old stock). All PLS100N are still in their original tubes and boxes (data code 1999,that is the last production).
An online electronic component dealer that's been around since 2009.
An archive of logos of IC manufacturers, for identifying chips. I don't know when the last time it was updated was, though.
A collection of tools I use to reverse engineer PAL (programmable array logic) devices. These tools are meant to satisfy my needs. I'm sharing them here in case someone finds them useful.
TinyTapeout is an educational project that makes it easier and cheaper than ever to get your digital designs manufactured on a real chip! If you’re new to digital design, start by taking some of our lessons. Then create your own design with the Wokwi template or for advanced users, an HDL. For help and support, check the FAQ and join the fast & friendly conversations on Discord.
A database of motherboards, BIOS images, chipsets, manufacturers, drivers, software. If you have an ancient PC and you're trying to figure it out, check here first.
Here’s a list of EPROM device IDs, as used in EPROM programming software such as XGPro. This is the most complete list I’ve come across and I struggled to find one, so it’s presented here for reference just in case it’s of any use to anyone.
Notes on how to use the minipro F/OSS chip programming software. Because the docs are missing important stuff, like how to use it.
Cloned to Windbringer.
PCBway community page for an adapter for a Commodore 1541-series disk drive. Makes it possible to add a parallel interface port to the drive for the purposes of disk ripping. Rather than cutting traces and soldering directly to a 6522 chip, it fits in between the chip and its socket. Add some ribbon cable and a DB-15 plug and there you go.
The picture is a helpful reference for how the IC socket and header bars are positioned.
Note that, per the response to my question:
Pins 9 and 10 are connected to pins 18 and 39 of 6522 - CB0 and CA1 (some count it from 1 so it's CB1 and CA2 then). They are needed only when drive is connected with C64 via userport to handshake while sending data. You don't need those for XUM1541/ZoomFloppy.
An open source program for controlling the MiniPRO TL866xx series of chip programmers. This program exists because the manufacturer of the MiniPRO TL866xx series of chip programmers does not provide a program for use on Linux or other flavors of Unix. We who keep this project going prefer a simple, free, and open-source program that presents a command-line interface that allows for a GUI front-end if desired.
Compatible with Minipro TL866CS, TL866A, and TL866II+ from Autoelectric. Supports more than 13000 target devices (including AVRs, PICs, various BIOSes and EEPROMs).
It's even in the AUR: https://aur.archlinux.org/packages/minipro
WikiChip is the preeminent resource for computer architectures and semiconductor logic engineering, covering historical and contemporary electronic systems, technologies, and related topics.
Retroleum's store of replacement (harvested) ICs for C64 repairs.
This is the LibreSilicon process specification (WIP) Please use XeLaTeX for rendering the documents
Features are:
1 micron (1 um)
twin-well for cmos
pbase / nbase (optional) for bipolar
shallow trench isolation
sonos for flash (optional)
silicificationaiming higher voltages, higher speed and higher feasibilty for modern Analog and System-on-Chip design.
A user-created database of chip and component pinouts. Faster than reading data sheets!