Difference between revisions of "GPU/External Registers"

Revision as of 23:50, 30 January 2013

Map

0x1EF00400 is the top screen
0x1EF00500 is the bottom screen

Init Values from nngxInitialize for Top Screen

0x1EF00400 = 0x1C2
0x1EF00404 = 0xD1
0x1EF00408 = 0x1C1
0x1EF0040C = 0x1C1
0x1EF00410 = 0
0x1EF00414 = 0xCF
0x1EF00418 = 0xD1
0x1EF0041C = 0x1C501C1
0x1EF00420 = 0x10000
0x1EF00424 = 0x19D
0x1EF00428 = 2
0x1EF0042C = 0x1C2
0x1EF00430 = 0x1C2
0x1EF00434 = 0x1C2
0x1EF00438 = 1
0x1EF0043C = 2
0x1EF00440 = 0x1960192
0x1EF00444 = 0
0x1EF00448 = 0
0x1EF0045C = 0x19000F0
0x1EF00460 = 0x1c100d1
0x1EF00464 = 0x1920002
0x1EF00470 = 0x80340
0x1EF0049C = 0

More Init Values from nngxInitialize for Top Screen

0x1EF00468 = 0x18300000, later changed by GSP module when updating state, framebuffer
0x1EF0046C = 0x18300000, later changed by GSP module when updating state, framebuffer
0x1EF00494 = 0x18300000
0x1EF00498 = 0x18300000
0x1EF00478 = 1, doesn't stay 1, read as 0
0x1EF00474 = 0x10501

This register controls how the LCD framebuffer is displayed.

0x1EF018E0

Register address	Description
0x1EF018E0	Buffer Size>>3
0x1EF018E8	Buffer physical address>>3
0x1EF018F0	Writing value 1 here triggers GPU processing for the specified buffer

These 3 registers are used by GX command 1.

0x1EF00010

Register address	Description
0x1EF000X0	Buffer physical address>>3
0x1EF000X4	Associated buffer physical address>>3
0x1EF000X8	Buffer size
0x1EF000XC	The low u16 for this register is overwritten by the GX command u16 parameter

These registers are used by GX command 2. 0x1EF00010 is used for the GX command buf0 parameters, while 0x1EF00020 is used for the GX command buf1 parameters.

0x1EF00C00

Register address	Description
0x1EF00C00	Buf0 physical address>>3
0x1EF00C04	Buf1 physical address>>3
0x1EF00C08	Unknown, used with cmd3
0x1EF00C0C	Unknown, used with cmd3
0x1EF00C10	Unknown, used with cmd3 and cmd4
0x1EF00C14	GSP module writes value 0 here prior to writing to 0x1EF00C18, for cmd3
0x1EF00C18	Writing value 1 here triggers GPU processing for the specified buffers
0x1EF00C20	Unknown, used with cmd4
0x1EF00C24	Unknown, used with cmd4
0x1EF00C28	Unknown, used with cmd4

These registers are used by GX command 3 and 4. For cmd4, *0x1EF00C18 |= 1 is used instead of just writing value 1.

@@ Line 1: / Line 1: @@
 == Map ==
-* 0x1EF00400 is the top screen
+* 0x1EF00400 is the top [[LCD|screen]]
-* 0x1EF00500 is the bottom screen
+* 0x1EF00500 is the bottom [[LCD|screen]]
 == Init Values from nngxInitialize for Top Screen ==
@@ Line 36: / Line 36: @@
 * 0x1EF00478 = 1, doesn't stay 1, read as 0
 * 0x1EF00474 = 0x10501
-== 0x1EF00X5C ==
-{| class="wikitable" border="1"
-!  Bit
-!  Description
-|-
-| 15-0
-| Framebuffer width?
-|-
-| 31-16
-| Framebuffer height?
-|}
-This register might control the framebuffer dimensions, however writing to this doesn't affect the displayed LCD image.
-== 0x1EF00X78 ==
-{| class="wikitable" border="1"
-!  Bit
-!  Description
-|-
-| 0
-| LCD framebuffer to display (0=first, 1=second)
-|-
-| 7-1
-| ?
-|-
-| 31-8
-| Unused
-|}
-== 0x1EF00X90 ==
-{| class="wikitable" border="1"
-!  Bit
-!  Description
-|-
-| 3-0
-| ?
-|-
-| 7-4
-| Controls the framebuffer dimensions and/or color format
-|-
-| 31-7
-| ?
-|}
 This register controls how the LCD framebuffer is displayed.
@@ Line 157: / Line 113: @@
 These registers are used by [[GX_Commands|GX command]] 3 and 4. For cmd4, *0x1EF00C18 |= 1 is used instead of just writing value 1.
-== Framebuffers ==
-{| class="wikitable" border="1"
-!  Address
-!  Description
-|-
-| 0x1EF00468
-| Main LCD, first framebuffer for 3D left
-|-
-| 0x1EF0046C
-| Main LCD, second framebuffer for 3D left
-|-
-| 0x1EF00494
-| Main LCD, first framebuffer for 3D right
-|-
-| 0x1EF00498
-| Main LCD, second framebuffer for 3D right
-|-
-| 0x1EF00568
-| Sub LCD, first framebuffer
-|-
-| 0x1EF0056C
-| Sub LCD, second framebuffer
-|}
-The above framebuffer registers contains the physical address for each framebuffer, normally located in FCRAM in the application's GSP heap.
-These LCD framebuffers normally contain the last rendered frames from the GPU. The color format is BGR8. The framebuffers are drawn from left-to-right, instead of top-to-bottom.(Thus the beginning of the framebuffer is drawn starting at the left side of the screen)
-Both of the 3D screen left/right framebuffers are displayed regardless of the 3D slider's state, normally when the 3D slider's state is set to "off" the left/right framebuffer addresses are set to the same physical address.