cgsix —
accelerated 8-bit color frame buffer
cgsix* at sbus? flags 0x0
wsdisplay* at cgsix?
The
cgsix is an SBus color frame buffer with
graphics acceleration, commonly found in the non ‘creator’ SBus
UltraSPARC workstations.
The
cgsix 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.
Different models exist, with various memory sizes and capabilities. The
cgsix driver supports the four flavours:
- GX
- GX+
- Turbo GX (or TGX)
- Turbo GX+ (or TGX+)
By default hardware acceleration is used to erase the screen and scroll text. By
setting
flags to
1 (via
config(8) or
boot_config(8)) this
acceleration can be disabled.
If the
cgsix frame buffer is used as the
console display, a different resolution than the default 1152x900 can be
selected by changing the OpenPROM environment. To change the default
resolution, type the following:
ok setenv
output-device screen:r1280x1024x76
to change to a 76Hz 1280x1024 resolution.
If the
cgsix 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
cgsix frame buffer accepts the following
resolutions:
- screen:r1024x768x60
- Super VGA 1024x768, with a refresh rate of 60Hz. Only available on TGX and
TGX+.
- screen:r1024x768x70
- Super VGA 1024x768, with a refresh rate of 70Hz. Only available on TGX and
TGX+.
- screen:r1024x768x76
- Super VGA 1024x768, with a refresh rate of 76Hz. Only available on TGX and
TGX+.
- screen:r1024x800x74
- 1024x800, with a refresh rate of 74Hz. Only available on TGX and
TGX+.
- screen:r1024x800x85
- 1024x800, with a refresh rate of 85Hz. Only available on GX+, TGX and
TGX+.
- screen:r1152x900x66
- Standard 1152x900, with a refresh rate of 66Hz.
- screen:r1152x900x76
- Standard 1152x900, with a refresh rate of 76Hz. This is the default
setting on GX and TGX.
- screen:r1280x1024x67
- High res 1280x1024, with a refresh rate of 67Hz. Only available on GX+ and
TGX+. This is the default on GX+.
- screen:r1280x1024x76
- High res 1280x1024, with a refresh rate of 76Hz. Only available on TGX+,
where this is the default setting.
- screen:r1600x1280x76
- High res 1600x1280, with a refresh rate of 76Hz. Only available on GX+ and
TGX+.
The 1600x1280 resolution is not officially supported by Sun on the GX+.
intro(4),
sbus(4),
wscons(4),
wsdisplay(4),
boot_config(8),
config(8)
Sun Frame Buffer FAQ,
http://www.sunhelp.org/faq/FrameBuffer.html.
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