Clock Signal (CLK)

2024-10-19

This release:

• adds support for the Oric vsync hardware hack, and also corrects the Oric's 60Hz frame length better to support software vsync; and
• improves — but far from perfects — its 6845 emulation, as primarily surfaced in the Amstrad CPC.

2024-09-08

This release:

• replaces the Electron's previous implementation of video output with one closely modelled on @moogway82's JamSoftElectronULA, itself a derivative of @hoglet67's ElectronFpga.

It thereby substantially improves compatibility with recent Electron demos such as @0xC0DE6502's basketball.

2024-08-27

• corrects a bug that could cause half-screen games to flicker on the Acorn Electron;
• improves automatic machine selection between the ZX Spectrum +3 and CPC for a large category of self-booting disk image; and
• corrects 65C02 bus behaviour during BBR and BBS instructions, improving emulation accuracy of the Enhanced Apple IIe.

2024-06-03 Latest

This release:

• corrects a bug that — although not local to that machines — was most likely to miscolour the left border of the Vic-20 if it had changed close to horizontal retrace; and
• adds the Archimedes' quick-load configuration option to the SDL command line, while also adding the Archimides itself to the Qt machine picker.

For those building for themselves and for the inevitable future, the code is also now completely valid C++20, having previously stumbled over a difference in the way std::memory_order is declared between C++17 and C++20.

2024-05-27

This release improves the Acorn Archimedes experience by:

• automatically launching the content of disk images in most cases where the emulator is launched via an image; and
• offering substantially accelerated loading.

2024-05-05

This release primarily improves the Archimedes:

• video emulation is improved, especially with regards to the left crop in titles like James Pond and Robocod, and the cursor being misplaced relative to content in 1bpp and 2bpp modes;
• runtime machine selection helps to resolve speed issues with early titles such as Zarch;
• errors in instruction fetch related to user mode have been fixed; and
• minor improvements have been made to floppy drive emulation.

2024-04-20

This release:

• adds a Mockingboard to the Apple II; and
• introduces tentative emulation of the Acorn Archimedes.