NAME
cgfourteen —
accelerated 8/24-bit color frame
buffer
SYNOPSIS
cgfourteen0 at obio0 addr 0x9c000000
(SS10SX and SS20)
cgfourteen1 at obio0 addr 0x90000000 (SS10SX and SS20)
wsdisplay* at cgfourteen?
DESCRIPTION
The cgfourteen is the on-board color frame
buffer, with graphics acceleration and overlay capabilities, found on the
SPARCstation 10SX and SPARCstation 20 workstations. The frame buffer will
not be enabled unless a VSIMM memory module is installed.
The second frame buffer will also require an ‘Auxiliary Video Board’ to be installed.
The cgfourteen 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
If the cgfourteen 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:r1280x1024x66
to change to a 66Hz 1280x1024 resolution.
If the cgfourteen 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 cgfourteen frame buffer accepts the
following resolutions:
Supported Video Modes
- 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.
- screen:r1280x1024x66
- High res 1280x1024, with a refresh rate of 66Hz.
Unsupported Video Modes
The following video modes are supported by the hardware, but not by Sun.
- screen:r1024x768x60
- Super VGA 1024x768, with a refresh rate of 60Hz.
- screen:r1024x768x66
- Super VGA 1024x768, with a refresh rate of 60Hz.
- screen:r1024x768x70
- Super VGA 1024x768, with a refresh rate of 70Hz.
- screen:r1024x800x84
- 1024x800, with refresh rate of 84Hz.
- screen:r1280x1024x76m
- High res 1280x1024, with a refresh rate of 76Hz. There is no typo, the ‘m’ suffix is required.
- screen:r1600x1280x66
- High res 1600x1280, with a refresh rate of 66Hz.
- screen:r1920x1080x72
- 1920x1080, with a refresh rate of 72Hz.
Resolutions of 1280x1024, 1600x1280 and 1920x1080 are 8-bit only with 4MB VSIMM.
SEE ALSO
intro(4), wscons(4), wsdisplay(4)
Sun Frame Buffer FAQ, http://www.sunhelp.org/faq/FrameBuffer.html.