TCX(4) OpenBSD Programmer's Manual (SPARC) TCX(4)NAMEtcx - 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
environment.
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
necessary to alter the value of fcode-debug? for the resolution settings
to be honoured.
SEE ALSOintro(4), sbus(4), wscons(4), wsdisplay(4)OpenBSD 4.9 November 26, 2009 OpenBSD 4.9
