Not to be confused with the FIC VA-503 A, which has a different southbridge.Retro PC experience. OEM version of the Intel Advanced/ZP above, with an undumped BIOS. Removed due to cache abuse by the BIOS diagnostics. The R418 is closest in chipset, BIOS and feature set. Removed due to bugs and a lack of identification.Īs with PCem, the integrated Mega Drive is not emulated.Ĥ86 CPUs are also supported, like on the real motherboard. The Sinclair PC200 is a rebadged Amstrad PC20, keeping the same hardware.īIOS is undumped, preventing us from implementing and validating this machine. Not implemented yet due to an unknown jumper settings mechanism. See here for differences between the 19 BIOS revisions.Ĩ6Box emulates the NCR Graphics Adapter (NGA) that went with this machine. Not implemented due to its undocumented Atari ST-based bus mouse.

The table below (make sure to scroll down) provides a reference for v4.0. More on the differences between PCem and 86Box in the configuration department later.Ĩ6Box has most of the machines PCem emulates, though we have removed, renamed and/or recategorized some of them for various reasons. You will have to reconfigure your emulated machine on 86Box, but that’s a nice opportunity to double-check your configuration while also checking out our features. There is no migration path for configuration files, as the format is too different. For now, you can use our 86Box Manager application, which provides basic configuration management or, even better, use the community-developed WinBox for 86Box, which has an user-friendly interface resembling PC virtualizers, as well as presets, screenshot and printed document management, and other cool features. 86Box does not have such a manager, though one is planned for the future. PCem has a built-in manager, which allows you to keep and run multiple emulated machine configurations from one place. There are certain limits to what’s attainable to emulate (as an example, we don’t do CPU caches, as that is too complex even for other non-PC emulators), but we try to follow what’s possible. Generally speaking, the more accurate a component’s emulation is made, the more host CPU horsepower it will require. In addition to taking fewer shortcuts, 86Box also tries to follow the specifications of these components, rather than implement the minimum viable feature set, which is - once again - good enough for games, but not good enough for some other applications. These shortcuts are perfectly fine for games, which is what PCem targets although, they have caused issues with the software preservation side of things, as we found out with Microsoft Word 1.0, the MR BIOS and other old pieces of software. PCem’s emulation of some core system components, such as the Programmable Interval Timer (PIT), takes a few shortcuts to improve performance. There is a way for you to try out the new recompiler on 86Box, though: go to our Jenkins, find whatever build number you’re using ( here’s 3400, the release build for v3.1) and download the New Recompiler (beta) variant that’s right for your host operating system and CPU architecture. One example of a regressed application is the (ironically related to a game) MapEdit level editor for Wolfenstein 3D, which we measured to lose as much as 85% emulation speed with the new recompiler on a relatively sensible Pentium 75 setup.Ĩ6Box uses the previous recompiler from PCem versions before v15, with optimizations performed by us, as we have determined that the new one causes too many regressions to be adopted as a sensible default. PCem v15 introduced a rewritten dynamic recompiler, which was primarily aimed at improving emulation performance in games however, it also caused minor to severe performance regressions in other applications.

There is indeed such a difference, but not everything is as black and white as it seems. One aspect commonly used to compare PCem and 86Box is the emulation performance. This post details all the differences between the two emulators that you have to keep in mind when migrating your setups to 86Box. While it is true that 86Box started out as a fork of PCem, we have since rewritten many components and made many additions, outgrowing our “fork” status. PCem users sometimes ask us about migrating their emulated setups to 86Box. 86Box | Blog: PCem Migration Guide Downloads Docs Blog GitHub

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