Sprite port-mirror Index Register - Revision history

Ped7g: read register detail extended by info from Allen

2019-12-06T20:56:24Z

read register detail extended by info from Allen

← Older revision		Revision as of 21:56, 6 December 2019
Line 19:		Line 19:
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	~~Bit~~ 7 always reads back as zero.		The read will in every mode return the sprite id (not pattern id) and bit 7 always reads back as zero.

Xalior at 23:22, 19 April 2019

2019-04-19T23:22:50Z

← Older revision		Revision as of 00:22, 20 April 2019
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	\|ShortDesc=Selects sprite index 0..127 to be affected by writes to other Sprite ports (and mirrors).		\|ShortDesc=Selects sprite index 0..127 to be affected by writes to other Sprite ports (and mirrors).
	}}		}}

	If sprite id lockstep in {{NextRegNo\|$09}} is enabled, write to this registers has same effect as writing to {{PortNo\|$303B}}.		If sprite id lockstep in {{NextRegNo\|$09}} is enabled, write to this registers has same effect as writing to {{PortNo\|$303B}}.

Specnext: 4 revisions imported

2019-04-14T10:00:21Z

4 revisions imported

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

wiki>Ped7g at 19:44, 27 January 2019

2019-01-27T19:44:31Z

← Older revision		Revision as of 20:44, 27 January 2019
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	If sprite id lockstep in {{NextRegNo\|$09}} is disabled, bit 7 is ignored and bits 6-0 value selects index 0..127 for NextRegs $35..$39 and $75..$79 (decoupled from ports $xx57/$303B completely?).		If sprite id lockstep in {{NextRegNo\|$09}} is disabled, bit 7 is ignored and bits 6-0 value selects index 0..127 for NextRegs $35..$39 and $75..$79 (decoupled from ports $xx57/$303B completely).

	-------		-------

	Bit 7 always reads back as zero.		Bit 7 always reads back as zero.

wiki>Ped7g: Core 2.00.26 changes

2019-01-27T09:03:12Z

Core 2.00.26 changes

@@ Line 3: / Line 3: @@
 |Readable=Yes
 |Writable=Yes
-|ShortDesc=Selects sprite index 0..63 to be affected by writes to other Sprite ports (and mirrors).
+|ShortDesc=Selects sprite index 0..127 to be affected by writes to other Sprite ports (and mirrors).
 }}
-This link is broken by writing to nextreg $34 with bit 7 reset.
+If sprite id lockstep in {{NextRegNo|$09}} is enabled, write to this registers has same effect as writing to {{PortNo|$303B}}.

wiki>Ped7g: Core 2.00.23 changes (sprite-index link with port $303B)

2018-12-28T17:20:55Z

Core 2.00.23 changes (sprite-index link with port $303B)

@@ Line 3: / Line 3: @@
 |Readable=Yes
 |Writable=Yes
-|ShortDesc=Selects sprite index 0..63 to be affected by writes to other Sprite port-mirrors.
+|ShortDesc=Selects sprite index 0..63 to be affected by writes to other Sprite ports (and mirrors).
 }}
-Bits 7-6 are reserved (write 0), bits 5-0 are sprite index (0..63).
+{|class="wikitable"

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

2018-12-24T09:41:14Z

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

New page

{{NextRegister
|Number=$34
|Readable=Yes
|Writable=Yes
|ShortDesc=Selects sprite index 0..63 to be affected by writes to other Sprite port-mirrors.
}}
Bits 7-6 are reserved (write 0), bits 5-0 are sprite index (0..63).