NAME
zx – accelerated 24-bit color frame buffer
SYNOPSIS
zx* at sbus? wsdisplay* at zx?
DESCRIPTION
The ZX and TurboZX are dual-slot SBus color frame buffers, with graphics acceleration and overlay capabilities. They are also known as the Sun “Leo” graphics card.
The zx driver interfaces the frame buffer with 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 following resolutions are supported by the ZX frame buffer:
| Resolution | Refresh Rate | Details |
| 1280x1024 | 76 Hz | Non-interlaced |
| 1280x1024 | 67 Hz | Non-interlaced |
| 1152x900 | 76 Hz | Non-interlaced |
| 1152x900 | 66 Hz | Non-interlaced |
| 1024x768 | 76 Hz | Non-interlaced |
| 1024x768 | 60 Hz | Non-interlaced |
| 960x680 | 112 Hz | Stereo, non-interlaced 56 Hz field rate per eye |
| 960x680 | 108 Hz | Stereo, non-interlaced 54 Hz field rate per eye |
| 770x575 | 50 Hz | Interlaced - PAL |
| 640x480 | 59.94 Hz | Interlaced - NTSC |
If the ZX frame buffer is connected to a monitor at boot time, it will select its display resolution depending of the monitor ‘select code’ provided by the 13W3 connector. If the frame buffer is not connected to a monitor, the default resolution of 1152x900, with a 66 Hz refresh rate, will be selected. The selected resolutions are:
| Monitor | Resolution | Refresh | Monitor |
| sense code | Rate | Type | |
| 0 | 1024x768 | 76 Hz | X449A |
| 1 | 1152x900 | 66 Hz | |
| 2 | 1280x1024 | 76 Hz | X248A, GDM-205S |
| 3 | 1152x900 | 66 Hz | GDM-1955A15, GDM-1604A15, CPD-1790 |
| 4 | 1280x1024 | 67 Hz | GDM-20D10, GDM-1962 |
| 5 | 1152x900 | 66 Hz | |
| 6 | 1152x900 | 76 Hz | GDM-1662B, 17SMM4 |
| 7 | 1152x900 | 66 Hz |
SEE ALSO
CAVEATS
There is currently no software interface to change the frame buffer resolution at runtime.