Solaris Handbook for Sun Frame Buffers

S24 Frame Buffer Screen Resolutions

The S24 frame buffer in the SPARCstation(TM) 5 supports three different screen resolutions. You may select a screen resolution other than the default value. This is performed at the ok prompt.

Default Screen Resolutions

Table 2-1 lists the default screen resolutions by monitor ID sense code.

Table 2-1 S24 Frame Buffer Monitor Sense Codes


Code	Screen Resolution
7	1152 x 900 at 66 Hz
6	1152 x 900 at 76 Hz
5	1024 x 768 at 70 Hz
4	1152 x 900 at 76 Hz
3	1152 x 900 at 66 Hz
2	1152 x 900 at 76 Hz
1	1152 x 900 at 66 Hz
0	1152 x 900 at 66 Hz

Changing the Screen Resolution

You can change the screen resolution using two methods, depending on the frame buffer you select for the console. One method sets the default console device to the desired resolution. The other method forces the console to be the S24 monitor at a specified resolution.

To Change the Screen Resolution:

With the SPARCstation 5 powered on, bring the system down to the ok prompt.

At the ok prompt for the console-device selected by the CPU boot PROM, enter:
```
ok setenv output-device screen:resolution
```
where resolution is one of the following:
- r1152x900x66
- r1152x900x76
- r1024x768x70

To force the console to become the S24 monitor at the specified resolution, enter:
```
ok setenv output-device /iommu/sbus/tcx:resolution
```

To reset the system so that the NVRAM entry overwrites the monitor ID resolution selection, enter:
```
ok reset
```

To boot your SPARCstation 5 system, enter:
```
ok boot -r
```

The monitor is now reset to the specified resolution.