DOCUMENT:Q156822 09-AUG-2001 [winnt] TITLE :Tseng Labs ET4000-W32I Chipset Only Supports 65K Colors PRODUCT :Microsoft Windows NT PROD/VER:4.0 OPER/SYS: KEYWORDS:kbsetup ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Workstation version 4.0 - Microsoft Windows NT Server version 4.0 ------------------------------------------------------------------------------- SUMMARY ======= Any Video card using the Tseng Labs ET4000-W32I chipset under Windows NT 4.0 will only be able to support 65K colors. This is a change from Windows NT 3.5x, which allowed for 16.7M colors using the same chip set. The W32I chipset uses a banked video memory system. The 16.7M color mode requires 24 bits per pixel, which is difficult to implement on a banked video system. Windows NT 3.51 emulated a linear (non-banked) video system by using a page-fault driven banking scheme. In Windows NT 4.0, the Graphics Device Interface (GDI) and the video drivers were moved into the kernel. This move makes it impossible to implement non-banked emulation and, therefore, can only support 65K colors. MORE INFORMATION ================ Full 24-bit, 16.7M color is supported with video cards using the Tseng Labs ET6000 chipset. Additional query words: prodnt ====================================================================== Keywords : kbsetup Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTSsearch kbWinNTS400search kbWinNTS400 Version : 4.0 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.