Troubleshooting C64 PLA chip replacement
In this blog post I am going to dive a bit deeper into the ezPLA chip, investigate the reason why it does not work in all C64 machines and then try to fix it.
Electronics
Recreate C64 PLA chip in VHDL
A while back I made a prototype of a Commodore 64 PLA replacement chip in FPGA and covered this extensively in this blog post.
ezPLA - C64 PLA replacement PCB
A while back I created a prototype board for the PLA replacement chip for C64. It was time to make a PCB out of it. In this blog post I will describe the steps that I did to design the PCB using KiCad and manufacture it using PCBWay prototype service.
Teensy 4.1 PSRAM upgrade
Teensy 4.1 can be upgraded with up to 16 Megabytes of PSRAM. Here I describe the process.
1602 LCD module with I2C adapter
This 1602 display module includes an IIC adapter based on PCF8574 chip. This should work nicely on microcontrollers with a limited number of GPIO pins.
Boost Arduino Nano USB 5V to 12V
Using this DC Boost converter (XL6009E1) you can easily convert 5V from the Arduino Nano USB to 12V. This setup should come in handy to power the SID chip.
Atari 800XL PCB - soldering and troubleshooting
After collecting all the components needed for the Atari board it was finally time to solder them. But what are the chances that the project would work on first attempt? In my case it didn't and I will describe here my process of troubleshooting.
LS055R1SX04 2K LCD Screen with controller board
This SX04 2K LCD with controller board screen just got delivered. I will try to connect it to an HDMI output. RPi maybe? Believe it or not I have actually made an unboxing video.
BBC Micro:bit breadboard projects
This is the micro:bit. It is a pocket sized computer system with motion detection, a built-in compass and Bluetooth technology that can be used to learn programming and electronics.
Commodore 64 custom PLA chip test
A while back I also made a prototype for C64 PLA chip replacement, but I never did any further tests and completed the project.
I thought that it was time to do some more tests on the chip. But will it pass the tests? Let's find out...