1. WinNT.zip Driver
2. README.TXT File Contents

README.TXT Driver File Contents (WinNT.zip)

Windows NT 4.0 Drivers

Copyright (c) 1996-1999 Cyrix Corporation
Copyright (c) 1990-1996 Microsoft Corporation


Release Information

- Version 5.05.4.1018 01/08/1999
  Respect the miniport setting for screen stride (pitch) rather than trying
  to compute it in the display driver. Previously there was a problem with
  16 bpp modes in the WHQL tests where NT assumed the pitch was 1024 because
  the math works out, but SoftVGA set the pitch to 2048.

- Version 5.05.4.1017 11/12/98
  Add GetScanLine feature to direct draw support.
  Prevent video overlay from remaining if ddraw app is terminated.

- Version 5.05.4.1016 11/10/98
  Record new framebuffer offset when flipping overlay surface. This bug
  caused overlay surfaces (most noteably Overfly) to not be destroyed
  sometimes.
  Change DDBlt code to handle blits from one FourCC surface
  to another. This gets us through the FourCC tests on WHQL for
  PC98.
  When calling EngBitBlt to render for us, pass it the original
  surface pointer instead of the created surface pointer. The
  PC98 NT 5.0 tests croaked on this for some reason.
  Remove some debugging prints that could, in rare cases, cause the
  driver to read data that it doesn't have access to. (Applies only
  to debug versions.)

- Version 5.05.4.1015 10/20/98
  Fixed ddraw bug (unfiled) where the offset to offscreen memory
  was ocassionally incorrect. This showed up only under WHQL,
  ttddraw test at 1280x1024x8

- Version 5.05.4.1014 8/10/98
  Fixed Wormhole bug #2080 by adding memory mapped palette writes.
  Fixed flipcube tearing bug #2081 .
  Fixed DCT Ithaca bug #2087 by adding all direct draw low-res modes.

- Version 5.05.4.1013 3/3/98
  Added support for GXm/5530
  Fixed overfly bug #1808 by incorporating Win95 updates
  Went to Direct X5 numbering scheme

- Version 1.12 11/25/1997
  Added work-around for video on 6x and 7x GXm parts.
  Set VGA mode 3 on Video reset so PC97 manual display tests can pass.

- Version 1.11 11/13/1997
  Fix direct draw flip code to correctly wait for previous
  surface to finish flipping before going on. Fixes WHQL fail.

- Version 1.10 11/11/1997
  Mask off lowest 22 bits of DC_CUR_ST_OFFSET before using
  it.

- Version 1.09 11/9/1997
  Remove destblt capability bit from direct draw
  Missing icon problem fixed
  Add hook for examining machine state

- Version 1.08 11/5/1997
  Add GXm changes to paint and direct draw operations

- Version 1.07 11/3/1997
  Accelerate text glyphs
  GXm changes

- Version 1.06 10/10/1997
  Add version information to gx.dll and add copyright strings
  to gx.dll and gx.sys. (#1516)

  Completely remove unsupported modes from list of supported
  modes instead of just zeroing the length. This was responsible
  for intermittent crashes when the HCT short regression suite
  was doing auto-restarts. (#1530)

  Check for ExpressVideo running and abort miniport's DriverEntry
  if it isn't. (#1518)

- Version 1.05 9/25/1997

  Added bitblt workaround for requests with more than 50 clipping
  rectangles which use EngBitBlt to do the rendering. Clip rectangle
  enumeration cannot procede after a call to EngBitBlt. 

- Version 1.04 9/25/1997

  Fixed HCT errors including 16bpp drawing bug and masked blit.
  Added GXm support.

- Version 1.03 8/14/1997

  Fixed several internally discovered bugs in the video support.

- Version 1.02 8/1/1997

  Added support for Cognac video functions through direct draw

- Version 1.01 4/29/1997

  Remove 16 bpp modes for LOW memory model until more
  fully supported in firmware.

  Fixed bug which broke directdraw programs when they
  attempted to switch resolutions.

- Version 1.0 4/21/1997

  Direct Draw support.
  Cursor panning for flat-panel support.
  Video compression added.

- Version 0.2 beta, 3/25/1997

  Added sub-pixel line support.
  Next release:
    Cursor panning for flat-panel support.
    Direct Draw support.


- Version 0.1 alpha, 12/8/1996

  Initial release