Intel 815 Manuel D’Utilisation
Intel® 815 Chipset: Graphics Controller PRM, Rev 1.0
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11.2.7. GFXCMDPARSER _DEST_BUFFER_INFO
The GFXCMDPARSER DEST_BUFFER_INFO instruction is used to specify the information about the
destination buffer.
destination buffer.
This is an "immediate" instruction and therefore software must ensure that the
Rendering Engine and the local cache are flushed prior to modifying the destination buffer
information.
The format is:
Dword Bit
Description
0 31:29
Client: 000 – Instruction Parser
28:23
Opcode: 15h
22:6
Reserved: 00000h
5:0
DWORD_LENGTH: 00h
1 31:26
Reserved.
25:12
Base Address: This is the base address of the rendered scene in linear space. The
Memory Interface unit uses this address in conjunction with the Memory Fence Table
Registers to determine the virtual (Tiled) address of the dest buffer. This surface
address (linear) must be at least 4 KB aligned. in addition it must be 4 times pitch
aligned aligned.
Memory Interface unit uses this address in conjunction with the Memory Fence Table
Registers to determine the virtual (Tiled) address of the dest buffer. This surface
address (linear) must be at least 4 KB aligned. in addition it must be 4 times pitch
aligned aligned.
11:2
Reserved. MBZ
1:0
Pitch: This is the pitch of the Back Buffer. This is used by the TLB in computing the
absolute address of the color requests.
absolute address of the color requests.
00 = 512 bytes
01 = 1 KB
10 = 2 KB
11 = 4 KB