ATI 3D Rage IIC AGP & Video Memory

["Egor Tur" <worldeb@ukr.net>]

Hi.
I have ATI RAGE IIc video.
In my XFree86.log I found 

(II) ATI(0): Using 8MB linear aperture at 0xe6000000
(!!) ATI(0):  Virtual resolutions will be limited to 2047 kB
 due to linear aperture size and/or placement of hardware cursor image area
(II) ATI(0): Using block 0 MMIO aperture at 0xE5000400
(II) ATI(0): Using block 1 MMIO aperture at 0xE5000000
(==) ATI(0): Write-combining range (0xe6000000,0x200000)
(II) ATI(0): MMIO write caching enabled
(--) ATI(0): 2048 kB of Pseudo-EDO DRAM detected (using 2047 kB)
(WW) ATI(0): Cannot shadow an accelerated frame buffer

Is it means that I have 2MB (or only use) video memory?

$ lspci -v

       VGA compatible controller: ATI Technologies Inc 3D Rage IIC AGP (rev 7a) (prog-if 00 [VGA])
        Subsystem: ATI Technologies Inc: Unknown device 0088
        Flags: bus master, stepping, medium devsel, latency 64, IRQ 11
        Memory at e6000000 (32-bit, prefetchable) [size=16M]
        I/O ports at d000 [size=256]
        Memory at e5000000 (32-bit, non-prefetchable) [size=4K]
        Expansion ROM at <unassigned> [disabled] [size=128K]
        Capabilities: <available only to root>

$ cat /proc/mtrr

reg00: base=0x00000000 (    0MB),  size=   64MB: write-back, count=1

How can I set my video memory correctly ?
Thanx.