Difference between revisions of "Active Video Line MSB Register"

From SpecNext official Wiki
Jump to: navigation, search
m (Ped7g moved page Raster Line MSB Register to Active Video Line MSB Register: sync with "nextreg.txt" terminology)
(core 3.1.5 changes/refresh)
 
Line 8: Line 8:
  
 
The line coordinates use coordinate system of [https://gitlab.com/thesmog358/tbblue/blob/master/docs/extra-hw/copper/COPPER-v0.1c.TXT Copper coprocessor], i.e. line 0 is the first line of pixels.
 
The line coordinates use coordinate system of [https://gitlab.com/thesmog358/tbblue/blob/master/docs/extra-hw/copper/COPPER-v0.1c.TXT Copper coprocessor], i.e. line 0 is the first line of pixels.
 +
 +
Since core 3.1.5 the numbering of lines can be offseted by {{NextRegNo|$64}}.

Latest revision as of 08:20, 27 April 2020

Number $1E
Readable Yes
Writable No
Short Description Holds the MSB (only, as bit 0) of the raster line currently being drawn.

The low 8 bit part of the raster line number is in Active Video Line LSB Register ($1F).

The line coordinates use coordinate system of Copper coprocessor, i.e. line 0 is the first line of pixels.

Since core 3.1.5 the numbering of lines can be offseted by Vertical Video Line Offset Register ($64).