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GPU/External Registers (edit)

Revision as of 03:26, 15 June 2017

1,413 bytes added ,  03:26, 15 June 2017
→‎LCD Source Framebuffer Setup
Line 140: Line 140:  
! Name
 
! Name
 
! Comments
 
! Comments
 +
|-
 +
| 0x00
 +
| 4
 +
| Pixel timer (not pixel clock)
 +
| Higher values are slower, min. 0x1C1, bitmask 0xFFF
 +
|-
 +
| 0x04
 +
| 4
 +
| VScanStart(?)
 +
| Values 0xD1-0x1C1 inclusive are valid (except 2DS bottom screen)
 +
min. 0xD1, bitmask 0xFFF
 +
|-
 +
| 0x08
 +
| 4
 +
| ?
 +
|
 +
|-
 +
| 0x0C
 +
| 4
 +
| ?
 +
|
 +
|-
 +
| 0x10
 +
| 4
 +
| VAdjustGranule
 +
 +
or
 +
HAdjust(2DS bottom screen)
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| Finetune vertical pixel offset, 0x1C2 max = half pixel
 +
 +
or
 +
offset the bottom screen (0 to kill 2DS top screen, 0x1C2 max on bottom screen)
 +
|-
 +
| 0x14
 +
| 4
 +
| HEndOffset(?) (poor 2DS emulation)
 +
| Moves the frame left/right(after some conditions are met)
 +
 +
default value is 0xCF
 +
|-
 +
| 0x18
 +
| 4
 +
| ???
 +
|
 +
|-
 +
| 0x20
 +
| 4
 +
| ?
 +
| ??? the screen gets vertically offset with wrap-around
 +
horizontal timing gets messed up
 +
|-
 +
| 0x24
 +
| 4
 +
| HSync timer?
 +
|
 +
|-
 +
| 0x28
 +
| 4
 +
| VStart(?)
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|
 +
|-
 +
| 0x30
 +
| 4
 +
| VTotal
 +
| Total amount of vertical scanlines
 +
|-
 +
| 0x34
 +
| 4
 +
| VDisp
 +
| Total amonut of vertical scanlines displayed
 +
|-
 +
| 0x44
 +
| 4
 +
| ???
 +
| similar functionality to 0x10
 +
|-
 +
| 0x4C
 +
| 4
 +
| Overscan filler color
 +
|
 +
|-
 +
| 0x50
 +
| 4
 +
| Vertical scanline counter
 +
| read-only
 +
|-
 +
| 0x54
 +
| 4
 +
| Horizontal scanline counter
 +
| read-only
 
|-
 
|-
 
| 0x5C
 
| 0x5C
 
| 4
 
| 4
−
| Framebuffer width & height
+
| ???
−
| Lower 16 bits: width, upper 16 bits: height
+
| low u16: framebuffer width
 +
high u16: framebuffer height??? (seems to be unused)
 +
|-
 +
| 0x60
 +
| 4
 +
| ???
 +
| low u16: timing data(?)
 +
high u16: framebuffer total width (amount of pixels blitted regardless of framebuffer width)
 +
|-
 +
| 0x64
 +
| 4
 +
| ???
 +
| low u16: unknown
 +
high u16: framebuffer total height (amount of scanlines blitted regardless of framebuffer height)
 
|-
 
|-
 
| 0x68
 
| 0x68
MarcusD
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Retrieved from "https://www.3dbrew.org/wiki/Special:MobileDiff/20086"

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