Platform Notes: SPARCstation 10SX and SPARCstation 20 System Configuration Guide

Calculating the Amount of SXDRAM to Reserve

To calculate the amount of SXDRAM to reserve, add up the individual requirements and round up to the next multiple of 1 MByte. The individual requirements are:

The XGL Z buffer requires 4 bytes per pixel. The XGL back buffer is required only for RGB double buffering, and is also 4 bytes per pixel. For example, if the application uses an animated 24-bit Z-buffered raster that is limited to 900 x 900 pixels, then the SXDRAM requirement is 900 x 900 x 8 = 6480000 £ 7 MBytes (1048576 x 7 bytes).