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86Box 5.3 Adds Crystal CS4232 Audio and IBM PS/55 Support

The latest update to the low-level x86 emulator brings new audio options and specific CPU support for Japanese market machines.

86Box 5.3 Adds Crystal CS4232 Audio and IBM PS/55 Support
86Box

If you have ever looked at DOSBox and thought it was simply too convenient, 86Box is likely already installed on your hard drive. The low-level x86 emulator focuses on replicating specific motherboard and hardware configurations rather than just running software. It has now reached version 5.3, bringing a new wave of beige box nostalgia to your modern desktop.

As detailed in the official release notes, the update introduces support for the Crystal CS4232 audio controller. This addition, contributed by user @win2kgamer, fills a specific gap in mid-90s audio emulation. The Crystal chips were common in laptops and integrated motherboards of the era. They provided a reliable, if sometimes unexciting, alternative to the dominant Sound Blaster cards.

Big in Japan

The update also expands support for the IBM PS/55 line. These were personal computers IBM marketed specifically in Japan. The patch includes CPU and name updates for these machines, courtesy of contributor @WNT50. This is the sort of granular hardware support that distinguishes 86Box from other emulators. It allows users to replicate the exact clock speeds and quirks of regional hardware variants.

Other changes in version 5.3 include:

  • A new Unix mode On-Screen Display (OSD) implemented by @Valefungo.
  • Fixes for OpenGL screenshot crashes.
  • A revert of specific S3 ViRGE masks.
  • Corrections to the Tandy CRTC-based display implementation.

The Cost of Accuracy

86Box remains a demanding piece of software. Because it emulates the hardware at a low level, it requires a reasonably powerful modern CPU to run faster guest machines. A 300MHz Pentium II in the emulator can bring a modern i7 to its knees. However, for preservationists and enthusiasts who need to simulate the exact behavior of a specific BIOS revision or chipset, there is no substitute.

The project continues to be open source. It relies on a community of contributors to map out the endless combinations of video cards, sound chips, and motherboards that defined the PC era.

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