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This release:

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

This release:

• fixes broken horizontal scrolling on the Master System;
• correctly declines to page on the Electron if receiving interrupt acknowledgments;
• corrects mismapping of Apple II inverted characters;
• avoids automatic key repeat on the early Apple IIs; and
• with thanks to @ryandesign avoids potential performance issues on multi-GPU macOS machines with macOS 10.15+.

This release fixes a regression in static media analysis introduced by release 2023-12-26 that affected disk images for the Electron, Amstrad CPC, Oric and ZX Spectrum.

This release:

• improves support for Apple II NIB images;
• thanks to @ryandesign corrects Apple II/II+/IIe floating bus issues;
• resolves a potential crash-at-startup for the Enterprise;
• resolves potential stuck-on drive motors on the Amiga;
• resolves some disk writing issues specific to the Enhanced Apple IIe;
• thanks again to @ryandesign also corrects an internal optimisation around Disk II write protection sensing, and an error to do with data bus loading; and
• adds emulation of the most basic form of IBM PC — an 8086 compatible with MDA or CGA graphics and a floppy drive.

Addendum: PC emulation is somewhat uncharted territory for this emulator as it's a world where I'm not treating the bus(es) as king; there's no effort to emulate any specific, real machine, just to provide an accurate instruction set, memory and IO space. Overtly an attempt to broaden myself, time will tell whether this is a good fit for this project and for myself.

This release:

• includes fixes by @ryandesign to the sequence of addresses accessed by the Apple II for video generation, correcting broken instances of vapour lock;
• includes further build-system fixes by @ryandesign that reintroduce support for macOS 10.13; and
• corrects address generation logic for the undocumented 6502 instructions SHS, SHX, SHY and SHA.

This release:

• continues improvements to the MSX 2, especially its video chip and this emulator's automated detection of cartridge types;
• corrects the 65c02's BCD results, where they differ from a vanilla 6502;
• corrects the 65816's state after a BRK while in emulation mode; and
• resolves some timing discrepancies in some of the unofficial NOPs on the base 6502.

This release:

• adds MSX-MUSIC (i.e. OPLL) support for the MSX 2;
• introduces missing MSX configuration options for the Qt build; and
• adds a file association for .mx2 files.

This release expands MSX emulation to include a first attempt at the MSX 2; improvements and corrections are likely to follow.

This release:

• addresses flag errors in the 68000's shift operators, improving compatibility;
• adds support for Apple II .HDV files, and adds a SCSI status indicator; and
• fixes a potential stuck-key problem with using the keyboard as an ersatz joystick under macOS.

This release:

• fixes an error in Apple II disk image handling that caused corruption upon save; and
• adds emulation of the Apple II SCSI card.