TGA(4) - Device Drivers Manual (alpha) #

TGA(4) - Device Drivers Manual (alpha)

NAME #

tga - DECchip 21030 (TGA) graphics driver

SYNOPSIS #

tga* at pci? wsdisplay* at tga?

DESCRIPTION #

This driver handles DECchip 21030 (TGA) graphics hardware within the wscons(4) console framework.

On TGA adapters, the resolution is set on the card and is not changed at runtime. On some TGA models, there are four DIP switches. On other models, there is a rotary switch with positions 0-F. There are also some that use jumpers.

TGA Switch Settings #

**Switch** **Pixel**     **Monitor**   **Refresh**  
**Setting** **Freq (MHz)** **Resolution** **Rate (MHz)**  
`0`        130           1280x1024     72  
`1`        119           1280x1024     66  
`2`        108           1280x1024     60  
`3`        104           1152x900      72  
`4`        93            1152x900      66  
`5`        75            1024x768      70  
`6`        74            1024x768      72  
`7`        69            1024x864      60  
`8`        65            1024x768      60  
`9`        50            800x600       72  
`A`        40            800x600       60  
`B`        32            640x480       72  
`C`        25            640x480       60

The settings for D, E, and F are for 1600x1200 on some cards, but there are no guarantees.

There are also a couple of extra jumpers on some cards. One of these jumpers often selects the card to be the primary display. Exactly one of the cards in your machine should have that jumper on. If you have extra cards, they should have the jumper off.

BUGS #

There are some problems with the background randomly switching between black and blue.

OpenBSD 7.5 - April 17, 2013