Sprite Attribute 4 Register - Revision history

Xalior: Xalior moved page Sprite port-mirror Attribute 4 Register to Sprite Attribute 4 Register: match formal nextreg.txt name

2025-10-14T10:52:54Z

Xalior moved page Sprite port-mirror Attribute 4 Register to Sprite Attribute 4 Register: match formal nextreg.txt name

← Older revision		Revision as of 11:52, 14 October 2025
(No difference)

Specnext: 3 revisions imported

2019-04-14T10:00:21Z

3 revisions imported

← Older revision		Revision as of 11:00, 14 April 2019
(No difference)

wiki>Ped7g: Core 2.00.27 (or 28) changes to relative sprite system.

2019-02-11T02:10:21Z

Core 2.00.27 (or 28) changes to relative sprite system.

← Older revision		Revision as of 03:10, 11 February 2019
Line 6:		Line 6:
	}}		}}
	Byte 5 is bitmapped:		Byte 5 is bitmapped:
			:For '''anchor''' sprites:
	{\|class="wikitable"		{\|class="wikitable"
	! Bit !! Description		! Bit !! Description
	\|-		\|-
	\| 7 \|\| ~~If 1~~, ~~the~~ pattern ~~will be treated as~~ 4-bit colour ~~one~~ (128 bytes), 0 is ~~for 8~~-bit colour ~~patterns~~ (~~256~~ bytes)		\| 7-6 \|\| "H N6" - "H" is 4/8 bit graphics selector, "N6" is sub-pattern selector for 4 bit modes.<br />
			%00 = 8-bit colour patterns (256 bytes), this sprite is "'''anchor'''"<br />
			%01 = this sprite is "'''relative'''" (4/8-bit colour is selected by "anchor" sprite) → see tables below<br />
			%10 = 4-bit colour pattern (128 bytes) using bytes 0..127 of pattern slot, this sprite is "'''anchor'''"<br />
			%11 = 4-bit colour pattern (128 bytes) using bytes 128..255 of pattern slot, this sprite is "'''anchor'''"
	\|-		\|-
	\| 6 \|\| ~~(if bit 7 = 1)~~: ~~Chooses top/bottom part of pattern slot when 4-bit colour pattern~~		\| 5 \|\| Type for following '''relative''' sprites: 0 = "composite", 1 = "big sprite"
	0 ~~will target bytes 0..127 of pattern~~ "~~Name~~" ~~(byte 4)~~, 1 ~~will target bytes 128..255 of pattern~~ "~~Name".~~

	~~(if bit 7 = 0): make this~~ sprite "~~relative" one: 1 = relative, 0 = normal (anchor) type~~
	\|-		\|-
	\| 5 \|\| ~~(if bit 7~~-6 = %01) ~~for "relative" sprite, this bit chooses top/bottom part of pattern slot for 4~~-~~bit colour mode~~ (~~4 or 8 bit mode is set by anchor sprite~~, relative ~~sprite can~~'~~t switch the colour mode). See~~ Bit 6 ~~description above~~, ~~if anchor sprite is~~ in 4-bit mode. ~~If anchor sprite is in~~ 8-bit mode, use ~~always 0~~		\| 4-3 \|\| x-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)
	~~(else) For normal (anchor) sprites this is reserved, use always~~ 0		\|-
			\| 2-1 \|\| y-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)
			\|-
			\| 0 \|\| MSB of Y coordinate
			\|}
			:For '''composite relative''' sprites:
			{\|class="wikitable"
			! Bit !! Description
			\|-
			\| 7-6 \|\|%01 = relative sprite
			\|-
			\| 5 \|\| "N6" bit, in 4-bit colour mode 0 = using bytes 0..127 of pattern slot, 1 = using bytes 128..255 of pattern slot. In 8-bit mode use 0.
	\|-		\|-
	\| 4-3 \|\| x-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)		\| 4-3 \|\| x-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)
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	\| 2-1 \|\| y-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)		\| 2-1 \|\| y-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)
	\|-		\|-
	\| 0 \|\| ~~MSB~~ of ~~Y coordinate~~		\| 0 \|\| Enable relative pattern offset (1 = Pattern index is added to anchor pattern index, 0 = independent pattern index)
			\|}
			:For '''big-sprite relative''' sprites:
			{\|class="wikitable"
			! Bit !! Description
			\|-
			\| 7-6 \|\|%01 = relative sprite
			\|-
			\| 5 \|\| "N6" bit, in 4-bit colour mode 0 = using bytes 0..127 of pattern slot, 1 = using bytes 128..255 of pattern slot. In 8-bit mode use 0.
			\|-
			\| 4-1 \|\| use 0 (scaling is defined by '''anchor''' sprite)
			\|-
			\| 0 \|\| Enable relative pattern offset (1 = Pattern index is added to anchor pattern index, 0 = independent pattern index)
	\|}		\|}

	See {{PortNo\|$xx57}} for extra notes about anchor/relative sprites, coordinates and clipping.		See {{PortNo\|$xx57}} for extra notes about anchor/relative sprites, coordinates and clipping.

wiki>Ped7g: core 2.00.23 changes

2018-12-28T20:33:42Z

core 2.00.23 changes

← Older revision		Revision as of 21:33, 28 December 2018
Line 11:		Line 11:
	\| 7 \|\| If 1, the pattern will be treated as 4-bit colour one (128 bytes), 0 is for 8-bit colour patterns (256 bytes)		\| 7 \|\| If 1, the pattern will be treated as 4-bit colour one (128 bytes), 0 is for 8-bit colour patterns (256 bytes)
	\|-		\|-
	\| 6 \|\| Chooses top/bottom part of pattern slot ~~(for~~ 4-bit colour ~~patterns)~~		\| 6 \|\| (if bit 7 = 1): Chooses top/bottom part of pattern slot when 4-bit colour pattern
	0 will target bytes 0..127 of pattern "Name" (byte 4), 1 will target bytes 128..255 of pattern "Name".		0 will target bytes 0..127 of pattern "Name" (byte 4), 1 will target bytes 128..255 of pattern "Name".

			(if bit 7 = 0): make this sprite "relative" one: 1 = relative, 0 = normal (anchor) type
	\|-		\|-
	\| 5 \|\| ~~Reserved~~, use always 0		\| 5 \|\| (if bit 7-6 = %01) for "relative" sprite, this bit chooses top/bottom part of pattern slot for 4-bit colour mode (4 or 8 bit mode is set by anchor sprite, relative sprite can't switch the colour mode). See Bit 6 description above, if anchor sprite is in 4-bit mode. If anchor sprite is in 8-bit mode, use always 0
			(else) For normal (anchor) sprites this is reserved, use always 0
	\|-		\|-
	\| 4-3 \|\| x-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)		\| 4-3 \|\| x-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)
Line 23:		Line 26:
	\|}		\|}

	See {{PortNo\|$xx57}} for extra notes about coordinates and clipping.		See {{PortNo\|$xx57}} for extra notes about anchor/relative sprites, coordinates and clipping.

wiki>Ped7g: Core 2.00.22 changes, and forum knowledge from Jim Bagley distilled.

2018-12-24T10:08:53Z

Core 2.00.22 changes, and forum knowledge from Jim Bagley distilled.

New page

{{NextRegister
|Number=$39
|Readable=No
|Writable=Yes
|ShortDesc=Nextreg port-mirror to write directly into "byte 5" of {{PortNo|$xx57}}.
}}
Byte 5 is bitmapped:
{|class="wikitable"
! Bit !! Description
|-
| 7 || If 1, the pattern will be treated as 4-bit colour one (128 bytes), 0 is for 8-bit colour patterns (256 bytes)
|-
| 6 || Chooses top/bottom part of pattern slot (for 4-bit colour patterns)
0 will target bytes 0..127 of pattern "Name" (byte 4), 1 will target bytes 128..255 of pattern "Name".
|-
| 5 || Reserved, use always 0
|-
| 4-3 || x-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)
|-
| 2-1 || y-axis scale factor: %00 = 1x (16 pixels), %01 = 2x, %10 = 4x, %11 = 8x (128 pixels)
|-
| 0 || MSB of Y coordinate
|}

See {{PortNo|$xx57}} for extra notes about coordinates and clipping.