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

NAME
     tcx - accelerated 8/24-bit color frame buffer

SYNOPSIS
     tcx* at sbus?
     wsdisplay* at tcx?

DESCRIPTION
     The tcx is an 8 bit color frame buffer, with graphics acceleration, found
     on-board the SPARCstation 4, and also available in a 24 bit version as an
     AFX board for the SPARCstation 5, called the S24.

     The tcx 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 tcx frame buffer will by default select its resolution and refresh
     rate according to the monitor sense information obtained from the 13W3
     connector.  If the tcx frame buffer is used as the console display, a
     different resolution can be selected by changing the OpenPROM environ-
     ment.

     If the tcx frame buffer is a secondary display, or a serial console is
     used, the display resolution can not be changed without using an nvramrc
     OpenPROM script.  Refer to the Sun Frame Buffer FAQ for details.

     The supported video modes depend on the particular frame buffer type.

   TCX (8 bit) video modes
     The 8 bit frame buffer supports the following video modes:

     Mode identifier    Resolution    Refresh Rate (MHz)
     r640x480x21        640x480       56Hz
     r640x480x25        640x480       60Hz
     r744x1273x105      744x1273      76Hz
     r1000x1022x105     1000x1022     76Hz
     r1024x768x54       1024x768      50Hz
     r1024x768x64       1024x768      60Hz
     r1024x768x70       1024x768      66Hz
     r1024x768x74       1024x768      70Hz
     r1024x768x81       1024x768      75Hz
     r1024x768x84       1024x768      77Hz
     r1024x800x81       1024x800      74Hz
     r1024x800x92       1024x800      84Hz
     r1024x800x94       1024x800      85Hz
     r1024x1024x92      1024x1024     62Hz
     r1152x900x54       1152x900      38Hz
     r1152x900x92       1152x900      66Hz
     r1152x900x94       1152x900      67Hz
     r1152x900x105      1152x900      76Hz
     r1152x900x108      1152x900      77Hz

     With the addition of a 1MB VSIMM, the following higher resolution models
     become available:

     Mode identifier    Resolution    Refresh Rate (MHz)
     r1280x1024x117     1280x1024     66Hz
     r1280x1024x118     1280x1024     67Hz
     r1280x1024x135     1280x1024     76Hz
     r1600x1280x76      1600x1280     66Hz
     r1920x1080x71      1920x1080     72Hz

     To change the default resolution, type the following:

       ok setenv fcode-debug?  true
       ok setenv output-device screen:r1024x800x94

     to change to an 85Hz 1024x800 resolution.  Note that setting fcode-debug?
     is absolutely necessary for the resolution settings to be honoured.

   S24 (24 bit) video modes
     The 24 bit frame buffer only supports the following video modes:

     Mode identifier    Resolution    Refresh Rate (MHz)
     r1024x768x70       1024x768      70Hz
     r1152x900x66       1152x900      66Hz
     r1152x900x76       1152x900      76Hz

     To change the default resolution, type the following:

       ok setenv output-device screen:r1024x768x70

     to change to a 70Hz 1024x768 resolution.  Unlike the TCX, it is not nec-
     essary to alter the value of fcode-debug?  for the resolution settings to
     be honoured.

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

OpenBSD 4.7                    November 26, 2009                             2
