ZX(4)                 OpenBSD Programmer's Manual (SPARC)                ZX(4)

NAME
     zx - accelerated 24-bit color frame buffer

SYNOPSIS
     zx* at sbus?
     wsdisplay* at zx?

DESCRIPTION
     The ZX and TurboZX are dual-slot SBus color frame buffers, with graphics
     acceleration and overlay capabilities.  They are also known as the Sun
     ``Leo'' graphics card.

     The zx driver interfaces the frame buffer with the wscons(4) console
     framework.  It does not provide direct device driver entry points but
     makes its functions available via the internal wsdisplay(4) interface.

DISPLAY RESOLUTION
     The following resolutions are supported by the ZX frame buffer:

     Resolution    Refresh Rate

     1280x1024     76 Hz           Non-interlaced
     1280x1024     67 Hz           Non-interlaced
     1152x900      76 Hz           Non-interlaced
     1152x900      66 Hz           Non-interlaced
     1024x768      76 Hz           Non-interlaced
     1024x768      60 Hz           Non-interlaced
     960x680       112 Hz          Stereo, non-interlaced
                                   56 Hz field rate per eye
     960x680       108 Hz          Stereo, non-interlaced
                                   54 Hz field rate per eye
     770x575       50 Hz           Interlaced - PAL
     640x480       59.94 Hz        Interlaced - NTSC

     If the ZX frame buffer is connected to a monitor at boot time, it will
     select its display resolution depending of the monitor `select code' pro-
     vided by the 13W3 connector.  If the frame buffer is not connected to a
     monitor, the default resolution of 1152x900, with a 66 Hz refresh rate,
     will be selected.  The selected resolutions are:

     Monitor       Resolution    Refresh    Monitor
     sense code                  Rate       Type

     0             1024x768      76 Hz      X449A
     1             1152x900      66 Hz
     2             1280x1024     76 Hz      X248A, GDM-205S
     3             1152x900      66 Hz      GDM-1955A15, GDM-1604A15, Li0
     4             1280x1024     67 Hz      GDM-20D10, GDM-1962
     5             1152x900      66 Hz
     6             1152x900      76 Hz      GDM-1662B, 17SMM4
     7             1152x900      66 Hz

SEE ALSO
     intro(4), sbus(4), wscons(4), wsdisplay(4)

CAVEATS
     The ZX and TurboZX cards will not function in a sun4c class machine, due
     to PROM limitations.

     There is currently no software interface to change the frame buffer reso-
     lution at runtime.

OpenBSD 4.7                     March 31, 2008                               1
