SPARCbook Portable Workstation User Guide
11-7
Using Displays
Simultaneous Display Operation
Resolution limitations
The SPARCbook provides 2 MBytes of video memory. This imposes a
limit on the resolution of the physical display that can be supported by
the SPARCbook. The total number of bytes required to drive a display
(which can calculated by multiplying the horizontal resolution, the
vertical resolution and number of bytes per pixel) must be equal to or
less than the physical frame buffer size.
Table 11-1 shows number of colors and the maximum resolution
supported for 8-, 16- and 32-bits per pixel video.
Simultaneous Display Operation
The internal display can be used simultaneously with an external
display if they both have the same resolution. For example, a
SPARCbook system fitted with a 1024 x 768 XGA display can drive an
external 1024 x 768 display at the same time. This is possible because
the hardware timing is similar for both displays.
Because the Xserver resolution is independent of the physical display
resolution, simultaneous display operation supports both native and
emulated frame buffer mode, with pan and zoom facilities available on
both displays.
Bits/Pixel
Colors
Maximum
Resolution
8
256 from 16777216
1600 x 1200
16
65536
1152 x 900
32
16777216
800 x 600
Table 11-1 SPARCbook Color/Resolution
S3UG4_Book Page 7 Friday, August 8, 1997 11:37 am
