SiS 5591(5592) GART VxD & Power Management Controller Driver Installation Guide
===============================================================================

Date: 09/07/1998
SiS 5591 AGP & PMC Driver package ver 1.40 has been released as "91agp140.exe"


[Files Descriptions]

(1) 5591AGP.VXD
    This VxD only supports SiS 5591 chipset and Microsoft Win95 OSR2.1.
(2) 5591AGP.PCI
    This miniport driver only supports 5591 chipset, and only using in Win98.
(3) SISPMC.INF
	SiS Power Management Controller Driver Installation Information File.


[System Requirement]
(1) Win95 OSR2.1 / Win98 Beta2
    In order to make sure your system is running on OSR2.1, find the subkey
    "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion", and see
    if the value of "VersionNumber" is either "4.03.1212" or "4.03.1214".
    If not, You can use Usbsupp.exe from Microsoft to upgrade Win95 OSR2 to
    OSR2.1.
(2) Build 122 or later of DirectX5
    Because only DirectX5 or later will enable AGP supports.


[Installation Instructions]

(1) Run program "SETUP.EXE" in the SiS 5591 GART VxD driver floppy and it will
    install the SiS VxD Driver or SiS miniport driver automatically onto your
    Windows 95 OSR2.1 or Windows 98 system.


[GART VxD FAQ]

Q: How to decide the APSIZE in the system BIOS setting?
A: APSIZE is used by GART VxD to create GART table. Totally there are
   (APSIZE/4K) entries and per entry is 4 bytes for a pointer address.
   So GARTReserve is limited by the total entries number.

   GART VxD uses a magic constant number, 12M bytes, to decide up to
   how many system memory can be commited by GARTCommit. That is, if
   system memory is 32M bytes, user can commit up to (32M-12M) bytes.

   Whereas APSIZE and MaxCommitableSize are two different things. User
   maybe successfully reserve 32M bytes non-local memory, but perhaps
   can only commit up to 20M bytes. Of course if user reserves too
   many or commit too many, either function will return failure to user.


[History]

Ver 1.02 (12/23/97)
========================================================
1. miniport driver change device number 5 to 0
2. install utility delete VGARTD's registry setting

Ver 1.1  (1/13/98)
========================================================
1. Add SiS 5591 Power Management Controller Driver

Ver 1.2  (2/27/98)
========================================================
1. Support DRAM size above 128M Bytes
2. Miniport driver fill the RQ_DEPTH field of AGP master

Ver 1.4  (9/3/98)
========================================================
1. Miniport driver fix Intel i740 boot failure problem