Technical Support Note
====================== 

Reference TSN No.	:	NA

Product(s) involve	:	VBFS200

Third party product(s)	:	AST - Premmia LX P/60
 

Subject
-------
1.	"Error found on frame buffer setting.  The base address you specified 
	..... is possibly a ROM region ...." when setting up the VBFS200 frame 
	buffer address.
2.	"Error found on frame buffer setting.  The base address you specified 
	....... probably has been used by your expanded memory manager ...." 
	when setting up the VBFS200 frame buffer address.

Description
-----------
AST Premmia LX P/60 PC user will encounter the above-mentioned problems 
when attempting to setup the VBFS200 frame buffer address.  The reason is 
this PC has a unique way of mapping the memory addresses through its BIOS 
CMOS setup.  This prevents the VBFS200 setup program from detecting any 
free UMB.  There are two options in the Advanced CMOS setup to affect the 
memory mapping, the following are their default values:

a.	Disable shadow memory size : Disabled
b.	Disable shadow memory base : C8000h

Solution/Action
---------------
The problem can be solved by changing the above option to the following 
settings:

a.	Disable shadow memory size : 64K
b.	Disable shadow memory base : D0000h

The value of "Disable shadow memory base" plus the "Disable shadow memroy 
size" must be sufficient to cover the frame buffer address of VBFS200.


10th March, 1994
Issue No: TSN94017
Technical Services Department, Creative Technology Ltd