Randy Rossi is back with another round of improvements in the BMC64 v3.5 update, and it’s packed with thoughtful additions for retro fans. This new version of the bare-metal Commodore emulator adds key enhancements to system compatibility, joystick support, and audio fidelity—without losing the low-latency performance that makes BMC64 shine.
Among the standout changes in the BMC64 v3.5 update is the introduction of dual SID support, which allows users to simulate stereo sound for an even richer audio experience. There’s also an important fix for CP/M keyboard responsiveness, resolving a regression issue that affected earlier builds.
Joystick configuration sees an upgrade too. Users can now map the same GPIO joystick control across multiple pins—great news for those with custom setups. And thanks to help from YouTube user “ody ody,” there’s now official support for the C64 Maxi keyboard layout, complete with menu-accessible virtual keymap files and a helpful tutorial in the README.
What’s New in BMC64 v3.5?
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Custom GPIO Improvements: Multiple pin mappings now allowed on the same joystick function.
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C64 Maxi Keyboard Support: Toggle new virtual keymap files directly from the menu.
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CP/M Fix: Keyboard input is once again responsive.
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Bug Fixes: Duplicate GPIO pin error in Config #1 and VDC video glitches have been resolved.
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Dual SID Support: Adds optional pseudo-stereo effect.
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Border Adjustments: Menu options now use absolute pixel values and support negative values for padding.
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Scaling Enhancements: A new
scaling_paramsentry inmachines.txtimproves integer scaling support, now easier to configure via the menu. -
PET Model Tuning: Default PET resolutions are now set to 1080p. An initialization bug after model switching has been corrected.
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Menu Refinement: New toggle added to disable scaling interpolation.
Whether you’re a purist tweaking borders or a SID audio aficionado, this BMC64 v3.5 update has something for you.
