TVTWO(4) | Device Drivers Manual (sparc64) | TVTWO(4)

# NAME

`tvtwo` — accelerated 24-bit color frame buffer

# SYNOPSIS

`tvtwo* at sbus?`
`wsdisplay* at tvtwo?`

# DESCRIPTION

The Parallax XVideo and PowerVideo frame buffers, also known as ‘tvtwo’, are memory based color frame buffers, with graphics acceleration and overlay capabilities, and hardware MPEG decoding.

The `tvtwo` driver interfaces the frame buffer to 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 XVideo and PowerVideo frame buffers will adapt their resolution and refresh rate to the monitor they are connected to. However, when not connected to a Sun monitor, the device will default to the cgthree(4)-compatible 1152x900 resolution, with a refresh rate of 67Hz. A different resolution can be forced using the rotary switch on the edge of the board.

The available modes are as follows:

Rotary | Resolution | Refresh Rate
`0` | autodetect | autodetect
`1` | 1152x900 | 67Hz
`2` | 1152x900 | 76Hz
`3` | 1152x900 | 60Hz
`4` | 1024x768 | 77Hz
`5` | 640x480 | 60Hz

All other rotary positions will behave as position 0, except for positions E and F. Position E enables the board built-in debugger on the serial port, and should not be used by end-users. Position F selects the video mode settings stored in the cards NVRAM. These settings cannot be modified under OpenBSD.

# SEE ALSO

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

# CAVEATS

This driver does not support any acceleration features at the moment.

December 3, 2011 | Debian