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

NAME
     tvtwo - accelerated 24-bit color frame buffer

SYNOPSIS
     tvtwo* at sbus?
     wsdisplay* at tvtwo?

DESCRIPTION
     The Parallax XVideo and PowerVideo frame buffers, also known as `tvtwo',
     are memory based color frame buffers, with graphics acceleration and
     overlay capabilities, and hardware MPEG decoding.

     The tvtwo driver interfaces the frame buffer to 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 XVideo and PowerVideo frame buffers will adapt their resolution and
     refresh rate to the monitor they are connected to.  However, when not
     connected to a Sun monitor, the device will default to the
     cgthree(4)-compatible 1152x900 resolution, with a refresh rate of 67Hz.
     A different resolution can be forced using the rotary switch on the edge
     of the board.

     The available modes are as follows:

           Rotary    Resolution    Refresh Rate
           0         autodetect    autodetect
           1         1152x900      67Hz
           2         1152x900      76Hz
           3         1152x900      60Hz
           4         1024x768      77Hz
           5         640x480       60Hz

     All other rotary positions will behave as position 0, except for posi-
     tions E and F.  Position E enables the board built-in debugger on the se-
     rial port, and should not be used by end-users.  Position F selects the
     video mode settings stored in the cards NVRAM.  These settings cannot be
     modified under OpenBSD.

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

CAVEATS
     This driver does not support any acceleration features at the moment.

     Storing video mode information in the NVRAM is not supported.

OpenBSD 4.7                     March 31, 2008                               1
