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
environment.
If the tcx frame buffer is a
secondary display, or a serial console is used, the display resolution
cannot 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.