---
name: "nsc"
section: "4"
platform: "linux"
package: "xserver-xorg-video-nsc"
version: "1:2.8.3-4"
release: "Debian 5.0 (Lenny)"
platforms: ["linux"]
url: "https://new.carta.tech/nsc"
---

# nsc(4)

Nsc video driver

## NAME

nsc - Nsc video driver

## SYNOPSIS

```
Section "Device"
  Identifier "devname"
  Driver "nsc"
  ...
EndSection
```

## DESCRIPTION

**nsc** is an Xorg driver for National Semiconductors GEODE processor family. It uses the DURANGO kit provided by National Semiconductor. The driver is accelerated, and provides support for the following  framebuffer depths: 8, 16 and 24.

## SUPPORTED HARDWARE

The **nsc** driver supports GXLV (5530 companion chip), SC1200, SC1400 and GX2 (5535 companion chip).

## CONFIGURATION DETAILS

Please refer to [xorg.conf(5)](/xorg.conf/5.md) for general configuration details.  This section only covers configuration details specific to this driver.

The driver will auto-detect the amount of video memory present for all chips. If the amount of memory is detected incorrectly, the actual amount of video memory should be specified with a **VideoRam** entry in the config file **"Device"** section.

The following driver **Options** are supported:

- **Option "SWCursor" "***boolean***"**

  Enable or disable the SW cursor.   Default: off.

- **Option "HWCursor" "***boolean***"**

  Enable or disable the HW cursor.   Default: on.

- **Option "NoAccel" "***boolean***"**

  Disable or enable acceleration.   Default: acceleration is enabled.

- **Option "NoCompression" "***boolean***"**

  Disable or enable compression.   Default: compression is enabled.

- **Option "ShadowFB" "***boolean***"**

  Enable or disable use of the shadow framebuffer layer.   Default: off.

- **Option "Rotate" "CW"**

  Rotate the display clockwise. This mode is unaccelerated, and uses the Shadow Frame Buffer layer. Default: no rotation.

- **Option "Rotate" "CCW"**

  Rotate the display counterclockwise. This mode is unaccelerated, and uses the Shadow Frame Buffer layer. Default: no rotation.

- **Option "FlatPanel" "***boolean***"**

  This enables the FlatPanel display unit. The FlatPanel depends on the  BIOS to do the Panel h/w initialization. In GX2 based platforms with TFT part Flatpanel is enabled, and on CRT part is disabled. Default: off.

- **Option "OSMImageBuffers" "***integer***"**

  This sets the number of scanline buffers to be allocated in offscreen  memory for acceleration. This can take any value 0 will disable the  allocation. Disabled if cannot allocate requested scanline memory. Default: 20.

- **Option "ColorKey" "***integer***"**

  This sets the default pixel value for the YUV video overlay key. Default: 0.

The following  **Options** are supported only on SC1200 based platforms:

- **Option "TV" "PAL-768x576"**

  Selects the PAL TV display mode 768x576 and the depth is forced to 16 bpp. Default: no TV.

- **Option "TV" "PAL-720x576"**

  Selects the PAL TV display mode 720x576 and the depth is forced to 16 bpp. Default: no TV.

- **Option "TV" "NTSC-720x480"**

  Selects the NTSC TV display mode 720x480 and the depth is forced to 16 bpp. Default: no TV.

- **Option "TV" "NTSC-640x480"**

  Selects the NTSC TV display mode 640x480 and the depth is forced to 16 bpp. Default: no TV.

- **Option "TV\_Output" "COMPOSITE"**

  The selected TV mode output is coded for Composite signal. Default: no TV.

- **Option "TV\_Output" "SVIDEO"**

  The selected TV mode output is coded for SVIDEO signal. Default: no TV.

- **Option "TV\_Output" "YUV"**

  The selected TV mode output is coded for YUV signal. Default: no TV.

- **Option "TV\_Output" "SCART"**

  The selected TV mode output is coded for SCART signal. Default: no TV.

- **Option "TVOverscan" x:yy:ww:hh"**

  This option will let only the viewable display area smaller to be able to  view on TV. The parameters xx: X-offset, yy: Y-offset, ww: Viewable width, hh: Viewable height. Default: no TV.

## SEE ALSO

[Xorg(1)](/Xorg/1.md), [xorg.conf(5)](/xorg.conf/5.md), xorgconfig(1), [Xserver(1)](/Xserver/1.md), [X(7)](/X/7.md)

## AUTHOR

Author: Sarma V. Kolluru