---
name: "tvtwo"
section: "4"
platform: "openbsd"
package: "man"
version: "8.0-current-20261101"
release: "OpenBSD 8.0-current (2026-11-01)"
platforms: ["openbsd"]
url: "https://new.carta.tech/tvtwo"
---

# tvtwo(4)

accelerated 24-bit color frame buffer

## 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)](/wscons/4.md) console framework. It does not provide direct device driver entry points but makes its functions available via the internal [wsdisplay(4)](/wsdisplay/4.md) 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)](/cgthree/4.md)-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)](/intro/4.md), [sbus(4)](/sbus/4.md), [wscons(4)](/wscons/4.md), [wsdisplay(4)](/wsdisplay/4.md)

## CAVEATS

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