The available VGA cards to emulate in QEMU are: > $ qemu-system-i386 -vga help > none no graphic card > std standard VGA (default) > cirrus Cirrus VGA > vmware VMWare SVGA > xenfb Xen paravirtualized framebuffer > qxl QXL VGA > qemu-system-i386: type is NULL > qemu-system-i386: type is NULL > virtio Virtio VGA
Here are the definitions: (from the man page) > -vga type > Select type of VGA card to emulate. Valid values for type are > > cirrus Cirrus Logic GD5446 Video card. All Windows versions > starting from Windows 95 should recognize and use this > graphic card. For optimal performances, use 16 bit color > depth in the guest and the host OS. (This card was the > default before QEMU 2.2) > > std Standard VGA card with Bochs VBE extensions. If your > guest OS supports the VESA 2.0 VBE extensions (e.g. Win‐ > dows XP) and if you want to use high resolution modes (>= > 1280x1024x16) then you should use this option. (This card > is the default since QEMU 2.2) > > vmware VMWare SVGA-II compatible adapter. Use it if you have > sufficiently recent XFree86/XOrg server or Windows guest > with a driver for this card. > > qxl QXL paravirtual graphic card. It is VGA compatible (in‐ > cluding VESA 2.0 VBE support). Works best with qxl guest > drivers installed though. Recommended choice when using > the spice protocol. > > tcx (sun4m only) Sun TCX framebuffer. This is the default > framebuffer for sun4m machines and offers both 8-bit and > 24-bit colour depths at a fixed resolution of 1024x768. > > cg3 (sun4m only) Sun cgthree framebuffer. This is a simple > 8-bit framebuffer for sun4m machines available in both > 1024x768 (OpenBIOS) and 1152x900 (OBP) resolutions aimed > at people wishing to run older Solaris versions. > > virtio Virtio VGA card. > > none Disable VGA card. The VGA cards that are applicable to the DOS era are 'cirrus' (16 bpp) or 'std' (the new default). You can use 'vmware' but there's no real benefit over 'std'. Same for 'virtio'. I just ran a manual test with all of the "vga" display options with qemu-system-i386 on my Linux desktop, booting FreEDOS and then immediately playing Flpybird. Not surprisingly, 'xenfb' and 'none' do not boot FreeDOS at all. :-) These others worked with Flpybird: 'std' 'cirrus' 'vmware' and 'qxl' (but 'virtio' doesn't completely fill the screen, leaving a gap at the top and bottom). From "VGA and other display devices in qemu" <https://www.kraxel.org/blog/2019/09/display-devices-in-qemu/> (2019) virtio vga: > This is a modern, virtio-based display device designed for virtual > machines. It comes with VGA compatibility mode. You need a guest driver to > make full use of this device. If your guest OS has no driver it should > still show a working display thanks to the VGA compatibility mode, > but the device will not provide any advantages over standard VGA then. > > This device has (optional) hardware-assisted opengl acceleration > support. This can be enabled using the virgl=on property, which in turn > needs opengl support enabled (gl=on) in the qemu display. > > This device has multihead support, can be enabled using the max_outputs=2 > property. > > This device has no dedicated video memory (except for VGA compatibility), > gpu data will be stored in main memory instead. Therefore this device > has no config options for video memory size. _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
