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pi1541 / Pi1541

Commodore 1541 emulator for the Raspberry Pi
GNU General Public License v3.0
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Piezo Buzzer - certain loaders force the buzzer to stick 'on' with high pitched squeal #220

Open billlagr opened 3 years ago

billlagr commented 3 years ago

Hi, A few specific loaders (eg, the Castlevania .g64) cause the buzzer to stick on with an ear splitting high pitched squeal. Only way to stop the noise is to power cycle the Pi, and then disable the buzzer either through a jumper or in the config file before loading. Is it possible to add a way to shut the buzzer off dynamically through the keyboard or a button combination - eg ALT-S to toggle the buzzer? This issue has been present for a while, I'm currently using 1.24 but I know it has happened in earlier versions too. 99% of images load fine and the buzzer works correctly, it's just a particular few.

glbyers commented 2 years ago

I'm experiencing the same issue, and have tested with a Pi2B and a Pi3A+ with numerous hats. I tested versions 1.24 back to version 1.21 and they all experience it. When it occurs, i'm seeing a little over 3V on the GPIO pin 33. There are no shorts between pin 33 and any other pin, so this seems to be Pi1541 not pulling down when stepper is off. Can be triggered repeatedly with the "Uncensored" demo from Booze design, for example.

glbyers commented 2 years ago

And... This only occurs when using a Jiffy DOS ROM.

ismal commented 1 year ago

It depends on the buzzer! I bought two different ones and I has this problem (looks like they were "active" once) and then I switched to a small "passive" one from China and it works great.