Date:    02/06/1998
Product: SiS 5591/5595,5592/5595
         SiS 5581,5582,5597,5598
         SiS 5571
         SiS 5596/5513
         SiS 5511/5512/5513
Subject: IDE Driver Change Notice

The IDE driver has been changed from 5IDE200.EXE to 5IDE201.EXE.
    Four parts have been changed :

         (1) SiS IDE Windows NT driver modified.
         (2) SiS IDE Windows 95 driver modified.
         (3) SiS IDE OS/2 driver modified.
         (4) SiS IDE DOS driver modified.

The versions of different OS are as follows :

    Windows NT 3.5/4.0 : Ver 1.40   (previous version 1.39)
    Windows 95         : Ver 1.47   (previous version 1.43)
    IBM OS/2           : Ver 1.40   (pervious version 1.40)
    Windows 3.1        : Ver 1.37   (pervious version 1.37)
    MS-DOS             : Ver 1.37   (pervious version 1.36)

===============================================================================
586IDE MODIFIED LOG:

[Release notes for Windows NT]
==============================
1. Sometimes the mouse can't be smoothly moved 
   when system has a Teac 8X CD-ROM with SiS IDE driver installed.
   Sol: V2.00a fixed.

[Release notes for Windows 95]
==============================
1. The Audio CD can't be played after SiS IDE/ DMA mode driver installed.
   Sol: V2.00a fixed.

2. The file copy from CD-ROM to HDD will be very slow
   when system has a Teac 8X CD-ROM with SiS IDE/DMA driver installed.
   Sol: V2.00a fixed.

3. The VCD can't be played when system has a Panasonic 24X CD-ROM
   with SiS IDE/DMA driver installed.
   Sol: V2.00a fixed.

4. The My Computer will be opened very slow
   when system has a Creative 6X CD-ROM (CD620E) with SiS IDE PIO/DMA driver
   installed.
   Sol: V2.00a fixed.

5. In SiS 5571, sometimes the mouse will freeze during copying files from
   CD-ROM to HDD when system has a Panasonic 12X CD-ROM with SiS IDE/DMA
   driver installed.
   Sol: V2.00a fixed.

6. In SiS 5571, the VCD can't be played when system has a Panasonic 8X CD-ROM
   or Hitachi 8X CD-ROM with SiS IDE/DMA driver installed.
   Sol: V2.00a fixed.

7. The CD-ROM's speed can't be showed correctly when system has a 
   Aopen 32X Ultra-DMA CD-ROM with SiS IDE driver.
   Sol: V2.01 fixed.

8. Change the driver from Double-buffer to Single-buffer.

[Release notes for OS/2]
========================
1. The system can't enter OS/2 environment when
   it has a Seagate ST33232A Ultra-DMA HDD with SiS IDE/DMA driver installed.
   Sol: V2.00a fixed.

[Release notes for Dos]
=======================
1. Fix the problem that error hard disk model numbers appear on 5591 if there
   is no hard disk attached to the channel
   Sol: V2.01 fixed
