ReMPU A1200
Posted: Fri Jun 12, 2020 10:02 pm
I have decided that I want to start my initial goal why I started looking at micro controllers in the first place.
My MPU in Amiga 1200 died and I was very angry when I did find that replacement cost is £36 plus shipping. And no alternative.
My goal is to make it as cheaply as technically possible. No fancy features just as it is.
My base is stm32f103 (blue pill) - £3 board.
Downside: need to remove keyboard pullups (R621) on A1200, as only half of pins on this MPU are 5V tolerant, and mpu is 3.3V.
Upside: No need for oscillator circuit as mpu has internal HSI is 8Mhz (low precision) ,and very low price (literally few £).
Challenges: Physical installation of stm32 on Amiga1200. I will be using ReAmiga1200 and A500 port to hook up blue pill.
I hope someone might be interested in this task and will solve it. If not there always will be option of blue pill some wires and Amiga keyboard connector.
I will post my progress here and code changes will be published here https://github.com/arkadiuszmakarenko/ReMPU_A1200
My MPU in Amiga 1200 died and I was very angry when I did find that replacement cost is £36 plus shipping. And no alternative.
My goal is to make it as cheaply as technically possible. No fancy features just as it is.
My base is stm32f103 (blue pill) - £3 board.
Downside: need to remove keyboard pullups (R621) on A1200, as only half of pins on this MPU are 5V tolerant, and mpu is 3.3V.
Upside: No need for oscillator circuit as mpu has internal HSI is 8Mhz (low precision) ,and very low price (literally few £).
Challenges: Physical installation of stm32 on Amiga1200. I will be using ReAmiga1200 and A500 port to hook up blue pill.
I hope someone might be interested in this task and will solve it. If not there always will be option of blue pill some wires and Amiga keyboard connector.
I will post my progress here and code changes will be published here https://github.com/arkadiuszmakarenko/ReMPU_A1200