Clock Signal vs WinFellow

Clock Signal is a free emulator for running classic software on Linux and macOS without first having to learn the original machine or emulator controls. It supports systems including the BBC Micro, Apple II, Atari 2600, Commodore Vic-20, early Macintosh, MSX, Sega Master System and ZX Spectrum. When you provide disk, tape or ROM media, it can identify and configure a machine, issue the commands needed to start the software, and speed up loading where possible. It does not import or take ownership of your files. The emulator processes video signals such as composite video and generates audio at the emulated machine’s source rate before filtering it for host output. Its README gives typical audio latency as 5–10 ms; display latency depends on host hardware. It aims for cycle-accurate emulation, which it says it achieves in some cases. Acorn Archimedes, Commodore Amiga and early PC compatible emulation is less complete than for the other listed systems. A BIOS is required. The project is MIT licensed, with macOS releases using Cocoa and Metal and Linux builds available through Qt, OpenGL or SDL options.

WinFellow is a free Amiga emulator primarily targeted at Windows and distributed under the GNU General Public License 2.0. It emulates the A500 and lists Windows 7, 8, 10 and 11 as host platforms. Supported disk image formats are ADF, HDF, DMS and IPF, while Kickstart is not included. Display scaling can be automatic, 3x or 4x, and screenshots can be saved to the Pictures folder. Version 0.5.11 changed the default display driver to Direct3D 11 where supported, and the release archive includes a native ARM64 build. WinFellow supports RDB hardfiles, although creating one through its GUI makes a plain hardfile. It supports keyboard reset in Amiga Forever, includes RetroPlatform integration and has Amiga Forever support modules. Its basic serial-port emulation has nothing connectable. Version 0.5.8 was the last release supporting Windows XP or Vista. The volunteer project welcomes code, feature and documentation contributions.