Clip Window Layer 2 Register - Revision history

Ped7g at 18:43, 14 August 2024

2024-08-14T18:43:58Z

← Older revision		Revision as of 19:43, 14 August 2024
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	The displayed area is "inclusive", i.e. for default values full 256x192 pixel area is displayed.		The displayed area is "inclusive", i.e. for default values full 256x192 pixel area is displayed.

			For Layer 2 modes ({{NextRegNo\|$70}}) with higher X resolution than 256 the X clip coordinates are doubled (320x256) or quadrupled (640x256) in same way how Sprites and Tilemap clip window works.

Specnext: 4 revisions imported

2019-04-14T09:59:50Z

4 revisions imported

← Older revision		Revision as of 10:59, 14 April 2019
(No difference)

wiki>Ped7g: Fixing read/write vs index auto increment description, thanks to Garry help on Facebook to identify the mistake

2019-01-06T23:13:57Z

Fixing read/write vs index auto increment description, thanks to Garry help on Facebook to identify the mistake

← Older revision		Revision as of 00:13, 7 January 2019
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	\|ShortDesc=Sets and reads clip-window for Layer 2.		\|ShortDesc=Sets and reads clip-window for Layer 2.
	}}		}}
	~~# read/write~~: X1 position		The coordinates are stored under index:
	~~# read/write:~~ X2 position		{\| class="wikitable"
	~~# read/write:~~ Y1 position		\|-
	~~# read/write:~~ Y2 position		! Index !! Coordinate
			\|-
			\| 0 \|\| X1 position
			\|-
			\| 1 \|\| X2 position
			\|-
			\| 2 \|\| Y1 position
			\|-
			\| 3 \|\| Y2 position
			\|}

	The ~~values are 0,255,0,191 after a Reset~~.		The current read/write index (which coordinate is selected) can be read or reset by {{NextRegNo\|$1C}}.

	~~The current read/write~~ index (~~which~~ coordinate is next) ~~can be read or reset by {{NextRegNo\|$1C}}~~.		Write to register will modify currently selected coordinate, and auto-increment index (wrapping from 3 to 0).

			Read from register will only read currently selected coordinate, index is not modified (to read next coordinate, write the current coordinate value back, to increment index).

			The coordinate values are 0,255,0,191 after a Reset.

			The displayed area is "inclusive", i.e. for default values full 256x192 pixel area is displayed.

wiki>Ped7g: further details from Jim in forum post

2018-12-23T12:54:14Z

further details from Jim in forum post

← Older revision		Revision as of 13:54, 23 December 2018
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	# read/write: Y2 position		# read/write: Y2 position

	The values are 0,255,0,191 after a Reset		The values are 0,255,0,191 after a Reset.

			The current read/write index (which coordinate is next) can be read or reset by {{NextRegNo\|$1C}}.

wiki>Ped7g at 18:57, 22 December 2018

2018-12-22T18:57:01Z

← Older revision		Revision as of 19:57, 22 December 2018
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	\|Readable=Yes		\|Readable=Yes
	\|Writable=Yes		\|Writable=Yes
	\|ShortDesc=Sets and reads clip-window for Layer 2		\|ShortDesc=Sets and reads clip-window for Layer 2.
	}}		}}
	# read/write: X1 position		# read/write: X1 position

wiki>Ped7g: added info + Core 2.00.22 changes (readable now)

2018-12-22T18:39:17Z

added info + Core 2.00.22 changes (readable now)

New page

{{NextRegister
|Number=$18
|Readable=Yes
|Writable=Yes
|ShortDesc=Sets and reads clip-window for Layer 2
}}
# read/write: X1 position
# read/write: X2 position
# read/write: Y1 position
# read/write: Y2 position

The values are 0,255,0,191 after a Reset