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randyrossi / bmc64

A bare metal Commodore 64 emulator for the Raspberry Pi with true 50hz/60hz smooth scrolling, low input latency and better audio/video sync.
GNU General Public License v3.0
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Emulator crashes when turning off scanlines in 1080p@50hz #209

Closed ghost closed 2 years ago

ghost commented 2 years ago

Hi Randy,

I've found that version 3.9 consistently crashes when scanlines are turned off within the crt shader menu when running at 1080p@50hz.

The only change I have made from the stock setup other than adding the c64 roms is to add the resolution information taken from the raspberry pi online config.txt guide entered for 1080p@50hz into the machine.txt file as below, which I believe are correct. All other settings within the machines.txt file remain unaltered. A photo of the crash screen is also attached.

[C64/PAL/HDMI/VICE 1080p@50Hz] disable_overscan=1 sdtv_mode=18 hdmi_group=1 hdmi_mode=31 machine_timing=pal-hdmi scaling_params=384,240,1152,720

bmc64_scanline_crash

randyrossi commented 2 years ago

I can't repro on my Pi2. Please let me know what Pi model you are running.

randyrossi commented 2 years ago

Problem was on user's Pi3. Changing gpu_mem=64 to gpu_mem=128 resolved this. But it's not clear why. Same config worked for me with gpu_mem=64.