PPU registers: Revision history

16 March 2015

• curprev 03:2303:23, 16 March 2015‎ Koitsu talk contribs‎ 22,682 bytes +43‎ No edit summary
• curprev 03:2103:21, 16 March 2015‎ Koitsu talk contribs‎ 22,639 bytes +1‎ →‎note
• curprev 03:2103:21, 16 March 2015‎ Koitsu talk contribs‎ 22,638 bytes +1‎ →‎OAM data ($2004) read/write
• curprev 03:2103:21, 16 March 2015‎ Koitsu talk contribs‎ m 22,637 bytes +1‎ →‎Obscure details of OAMADDR
• curprev 03:2003:20, 16 March 2015‎ Koitsu talk contribs‎ 22,636 bytes −26‎ →‎Controller ($2000) > write
• curprev 03:2003:20, 16 March 2015‎ Koitsu talk contribs‎ 22,662 bytes −15‎ →‎Notes
• curprev 03:1903:19, 16 March 2015‎ Koitsu talk contribs‎ 22,677 bytes +65‎ →‎note
• curprev 03:1603:16, 16 March 2015‎ Koitsu talk contribs‎ 22,612 bytes −27‎ →‎OAM data ($2004) read/write
• curprev 03:1503:15, 16 March 2015‎ Koitsu talk contribs‎ 22,639 bytes +55‎ →‎Obscure details of OAMADDR
• curprev 03:1003:10, 16 March 2015‎ Koitsu talk contribs‎ 22,584 bytes −52‎ →‎Obscure details of OAMADDR
• curprev 03:0903:09, 16 March 2015‎ Koitsu talk contribs‎ 22,636 bytes +261‎ No edit summary
• curprev 02:2702:27, 16 March 2015‎ Koitsu talk contribs‎ 22,375 bytes +25‎ No edit summary
• curprev 02:2302:23, 16 March 2015‎ Koitsu talk contribs‎ 22,350 bytes +501‎ No edit summary
• curprev 01:3401:34, 16 March 2015‎ Lidnariq talk contribs‎ 21,849 bytes −24‎ use the short anchors for the internal links
• curprev 01:2801:28, 16 March 2015‎ Lidnariq talk contribs‎ m 21,873 bytes +20‎ →‎note: use anchor links on this page to not reload
• curprev 01:1001:10, 16 March 2015‎ Koitsu talk contribs‎ 21,853 bytes −24‎ →‎note

14 March 2015

• curprev 00:5900:59, 14 March 2015‎ Tepples talk contribs‎ 21,877 bytes +446‎ each register has an anchor

16 February 2015

• curprev 23:4623:46, 16 February 2015‎ Rainwarrior talk contribs‎ 21,431 bytes +173‎ adding letters to register diagrams

15 February 2015

• curprev 17:4417:44, 15 February 2015‎ Tepples talk contribs‎ 21,258 bytes +252‎ →‎Summary: apply nowrap to each Bits because on a 1024px window, it was breaking at the space
• curprev 05:5205:52, 15 February 2015‎ Rainwarrior talk contribs‎ m 21,006 bytes −66‎ →‎Summary: cleanup
• curprev 05:4905:49, 15 February 2015‎ Rainwarrior talk contribs‎ 21,072 bytes +1,033‎ summary table

7 February 2015

• curprev 06:1106:11, 7 February 2015‎ Rainwarrior talk contribs‎ m 20,039 bytes 0‎ →‎Mask ($2001) > write: rm extra newline

3 February 2015

• curprev 03:0903:09, 3 February 2015‎ Rainwarrior talk contribs‎ 20,039 bytes +144‎ →‎OAM DMA ($4014) > write: potential OAM corruption issue (more Errata)
• curprev 03:0103:01, 3 February 2015‎ Rainwarrior talk contribs‎ 19,895 bytes +1,233‎ OAM DMA should be described here as well
• curprev 01:4201:42, 3 February 2015‎ Rainwarrior talk contribs‎ 18,662 bytes −24‎ $2001 moving PAL reference to references section, rm vertical mirroring suggesting (applies to any horizontal scrolling situation)
• curprev 01:3301:33, 3 February 2015‎ Rainwarrior talk contribs‎ 18,686 bytes +1,299‎ →‎Mask ($2001) > write: rewriting to include "errata" and more information about rendering on/off

2 August 2014

• curprev 13:4013:40, 2 August 2014‎ Tepples talk contribs‎ 17,387 bytes +96‎ →‎Mask ($2001) > write

22 May 2014

• curprev 00:4400:44, 22 May 2014‎ Lidnariq talk contribs‎ 17,291 bytes −86‎ the "other oddities" are what are explained in the following paragraph, so remove it. Include 2C07 differences.

18 May 2014

• curprev 02:2602:26, 18 May 2014‎ Lidnariq talk contribs‎ 17,377 bytes +300‎ →‎OAM data ($2004) read/write: oamdata isn't readable on older ppus

13 August 2013

• curprev 16:2616:26, 13 August 2013‎ Tepples talk contribs‎ 17,077 bytes +236‎ →‎Data ($2007) read/write: shared state caveat

31 July 2013

• curprev 23:2223:22, 31 July 2013‎ Lidnariq talk contribs‎ m 16,841 bytes +101‎ →‎Data ($2007) read/write: link to the "read 2007 during rendering" discussion.
• curprev 22:5722:57, 31 July 2013‎ Lidnariq talk contribs‎ 16,740 bytes +233‎ stop blaming OAMDATA; start blaming OAMADDR.

22 July 2013

• curprev 04:5204:52, 22 July 2013‎ Tepples talk contribs‎ m 16,507 bytes +24‎ →‎Notes: typo
• curprev 04:0104:01, 22 July 2013‎ Tepples talk contribs‎ 16,483 bytes +1,490‎ expand the "Note" (Bit 0 bus conflict) in PPUCTRL; other copyedits

17 July 2013

• curprev 20:3920:39, 17 July 2013‎ Ulfalizer talk contribs‎ 14,993 bytes +90‎ Probably best to just ignore writes to $2004 during rendering for emulation
• curprev 20:3620:36, 17 July 2013‎ Ulfalizer talk contribs‎ m 14,903 bytes +1‎ No edit summary
• curprev 20:3520:35, 17 July 2013‎ Ulfalizer talk contribs‎ 14,902 bytes +109‎ Sprite evaluation status might affect the glitchy OAMADDR increment when accessing OAMDATA during rendering
• curprev 20:3120:31, 17 July 2013‎ Ulfalizer talk contribs‎ 14,793 bytes +392‎ Writes to OAMDATA during rendering do not modify memory but do bump OAMADDR in a glitchy way

2 July 2013

• curprev 11:2211:22, 2 July 2013‎ Ulfalizer talk contribs‎ 14,401 bytes +399‎ Flesh out master/slave mode description

23 June 2013

• curprev 18:5918:59, 23 June 2013‎ Grapeshot talk contribs‎ 14,002 bytes +26‎ added link to list of games using color emphasis

18 June 2013

• curprev 18:0518:05, 18 June 2013‎ Lidnariq talk contribs‎ 13,976 bytes +258‎ →‎OAM data ($2004) read/write: big fat warning label

28 May 2013

• curprev 22:2722:27, 28 May 2013‎ Lidnariq talk contribs‎ 13,718 bytes +421‎ →‎Note: mention and link to glitchy scanline discussion

4 May 2013

• curprev 13:1713:17, 4 May 2013‎ Tepples talk contribs‎ 13,297 bytes −504‎ Undo revision 6204 by Ulfalizer (talk): "fancy-schmancy line drawing characters" aren't in all fonts, and automatic substitution by the browser breaks monospace
• curprev 09:0909:09, 4 May 2013‎ Ulfalizer talk contribs‎ 13,801 bytes +504‎ Use fancy-schmancy line drawing characters

23 April 2013

• curprev 14:2514:25, 23 April 2013‎ Tepples talk contribs‎ 13,297 bytes +25‎ →‎Mask ($2001) > write: "done horizontally" doesn't look clear

22 April 2013

• curprev 21:2821:28, 22 April 2013‎ Ulfalizer talk contribs‎ 13,272 bytes +56‎ Monochrome bit has no effect on writes to the palette (maybe obvious - confirmed in Visual 2C02)
• curprev 01:5001:50, 22 April 2013‎ Ulfalizer talk contribs‎ 13,216 bytes −17‎ Clarify that sprite overflow is broken and not merily complex

27 March 2013

• curprev 15:3115:31, 27 March 2013‎ Ulfalizer talk contribs‎ 13,233 bytes +28‎ Clarify PPUDATA read buffer address range.

25 March 2013

• curprev 02:0402:04, 25 March 2013‎ Ulfalizer talk contribs‎ 13,205 bytes +3‎ Linkify PPU memory map and move a paragraph out of 'The PPUDATA read buffer' section

23 March 2013

• curprev 10:4910:49, 23 March 2013‎ Ulfalizer talk contribs‎ 13,202 bytes +78‎ No more sprites will be found after the OAM pointer has reached the end of OAM.

22 March 2013

• curprev 04:5304:53, 22 March 2013‎ Ulfalizer talk contribs‎ 13,124 bytes +4‎ Use PPUDATA instead of $2007 to be more consistent with other sections.
• curprev 04:0504:05, 22 March 2013‎ Ulfalizer talk contribs‎ 13,120 bytes +80‎ Clarify how DMA works.
• curprev 03:3603:36, 22 March 2013‎ Quietust talk contribs‎ 13,040 bytes +463‎ →‎Obscure details of OAMADDR
• curprev 03:3403:34, 22 March 2013‎ Ulfalizer talk contribs‎ 12,577 bytes +57‎ OAMADDR obscure behavior clarification.
• curprev 03:2703:27, 22 March 2013‎ Ulfalizer talk contribs‎ 12,520 bytes +8‎ Small clarification of OAMADDR obscure behavior.
• curprev 03:2503:25, 22 March 2013‎ Ulfalizer talk contribs‎ 12,512 bytes +432‎ Add some OAMADDR details that I have verified in Visual 2C02.

21 March 2013

• curprev 06:0506:05, 21 March 2013‎ Ulfalizer talk contribs‎ 12,080 bytes −249‎ Undo revision 5784 by Ulfalizer (talk) (Should wait until the copying behavior has been verified. I can't reproduce it.)
• curprev 04:2604:26, 21 March 2013‎ Ulfalizer talk contribs‎ 12,329 bytes +249‎ Clarify how DMA transfer works and add some obscure details about $2003

19 March 2013

• curprev 19:0919:09, 19 March 2013‎ Ulfalizer talk contribs‎ 12,080 bytes +340‎ Clarify EXT input/output.
• curprev 06:1006:10, 19 March 2013‎ Ulfalizer talk contribs‎ 11,740 bytes +93‎ Small PPUDATA clarification.
• curprev 05:5605:56, 19 March 2013‎ Ulfalizer talk contribs‎ 11,647 bytes +384‎ Reads from the palette do affect the internal buffer. Also clarify when the internal buffer is updated.

16 March 2013

• curprev 17:2817:28, 16 March 2013‎ Ulfalizer talk contribs‎ 11,263 bytes +153‎ No edit summary
• curprev 15:2915:29, 16 March 2013‎ Ulfalizer talk contribs‎ m 11,110 bytes 0‎ Small grammar fix.
• curprev 15:2515:25, 16 March 2013‎ Ulfalizer talk contribs‎ 11,110 bytes +206‎ Clarify when the vblank/sprite 0/overflow flags are set and cleared.
• curprev 02:1902:19, 16 March 2013‎ Tepples talk contribs‎ 10,904 bytes +84‎ →‎Status ($2002) < read: Set and clear times for overflow bit per talk

21 December 2012

• curprev 17:5817:58, 21 December 2012‎ Tepples talk contribs‎ 10,820 bytes +58‎ →‎Scroll ($2005) >> write x2: start to make PPU scrolling easier to find

1 November 2012

• curprev 16:0416:04, 1 November 2012‎ Quietust talk contribs‎ m 10,762 bytes +453‎ →‎Controller ($2000) > write

4 October 2012

• curprev 01:1501:15, 4 October 2012‎ Rainwarrior talk contribs‎ 10,309 bytes +49‎ →‎Note: linking orphaned page about $2007 reads during rendering

31 August 2012

• curprev 19:4619:46, 31 August 2012‎ Tepples talk contribs‎ m 10,260 bytes −5‎ Parodius Da? more like Parodius DEL

2 June 2012

• curprev 18:5418:54, 2 June 2012‎ Tepples talk contribs‎ 10,265 bytes −68‎ →‎note: "Skinny" is on the wiki now

26 May 2012

• curprev 20:2120:21, 26 May 2012‎ Rainwarrior talk contribs‎ m 10,333 bytes +77‎ →‎Notes: link to clarify sprite overflow

23 April 2012

• curprev 19:1419:14, 23 April 2012‎ Tepples talk contribs‎ 10,256 bytes +74‎ →‎Status ($2002) < read: Sprite 0 will redirect here

22 September 2011

• curprev 20:0720:07, 22 September 2011‎ Doppel talk contribs‎ m 10,182 bytes +398‎ an important note re: sprite 0 hit flag and vertical blank

8 June 2011

• curprev 14:4214:42, 8 June 2011‎ Tepples talk contribs‎ 9,784 bytes +40‎ →‎Controller ($2000) > write: separate nibbles for clarity

21 December 2010

• curprev 13:1813:18, 21 December 2010‎ Tepples talk contribs‎ 9,744 bytes +86‎ →‎Mask ($2001) > write: Thanks, Q. I originally had it there because some people coming from ancient docs with the bits in the wrong order might get confused.

20 December 2010

• curprev 17:3417:34, 20 December 2010‎ Quietust talk contribs‎ 9,658 bytes −55‎ no they don't - they are correct

15 December 2010

• curprev 15:2915:29, 15 December 2010‎ Tepples talk contribs‎ 9,713 bytes +72‎ →‎Mask ($2001) > write: Grayscale affects $2007 readback as well
• curprev 15:2815:28, 15 December 2010‎ Tepples talk contribs‎ 9,641 bytes +514‎ →‎Mask ($2001) > write: Rewrite grayscale section (again), along with hopefully clearer style on some other details
• curprev 05:2205:22, 15 December 2010‎ Koitsu talk contribs‎ m 9,127 bytes +10‎ →‎Mask ($2001) > write

12 August 2010

• curprev 16:0216:02, 12 August 2010‎ Tepples talk contribs‎ 9,117 bytes +100‎ →‎note: Sample code on the BBS

9 June 2010

• curprev 04:2404:24, 9 June 2010‎ Blargg talk contribs‎ m 9,017 bytes +142‎ →‎OAM data ($2004) read/write: best to treat as write-only
• curprev 04:2204:22, 9 June 2010‎ Blargg talk contribs‎ 8,875 bytes +506‎ →‎Note: elaborated $2007 buffering note
• curprev 04:1504:15, 9 June 2010‎ Blargg talk contribs‎ 8,369 bytes +80‎ →‎Controller ($2000) > write: after power/reset, writes ignored for about 30000 cycles.

27 May 2010

• curprev 21:0221:02, 27 May 2010‎ Austere talk contribs‎ m 8,289 bytes +112‎ →‎Corrected incorrect information

28 March 2010

• curprev 20:3920:39, 28 March 2010‎ Tepples talk contribs‎ 8,177 bytes −395‎ That first paragraph now refers to the more complete documents on initialization

25 March 2010

• curprev 01:3701:37, 25 March 2010‎ Tepples talk contribs‎ 8,572 bytes +286‎ →‎Address ($2006) >> write x2: more explanation of how the VRAM port works for newcomers

21 March 2010

• curprev 17:3217:32, 21 March 2010‎ Eugene Romi talk contribs‎ m 8,286 bytes +12‎ →‎OAM address ($2003) > write: added link to PPU_OAM

19 March 2010

• curprev 20:0720:07, 19 March 2010‎ Tepples talk contribs‎ 8,274 bytes +33‎ →‎Controller ($2000) > write: just in case it wasn't clear

25 January 2010

• curprev 16:1516:15, 25 January 2010‎ Quietust talk contribs‎ m 8,241 bytes 0‎ nitpick: 1F will turn on grayscale, which probably isn't what you intended
• curprev 00:4900:49, 25 January 2010‎ Tokumaru talk contribs‎ 8,241 bytes +105‎ →‎Address ($2006) >> write x2
• curprev 00:4500:45, 25 January 2010‎ Tokumaru talk contribs‎ 8,136 bytes +4‎ →‎Scroll ($2005) >> write x2

24 January 2010

• curprev 13:3913:39, 24 January 2010‎ Tepples talk contribs‎ 8,132 bytes +206‎ →‎Status ($2002) < read: you can leave your sprites behind
• curprev 13:3713:37, 24 January 2010‎ Tepples talk contribs‎ 7,926 bytes +636‎ →‎Mask ($2001) > write: More complete description here
• curprev 09:2509:25, 24 January 2010‎ Tokumaru talk contribs‎ 7,290 bytes −50‎ →‎Scroll ($2005) >> write x2
• curprev 09:2209:22, 24 January 2010‎ Tokumaru talk contribs‎ m 7,340 bytes −1‎ →‎Mask ($2001) > write
• curprev 09:2109:21, 24 January 2010‎ Tokumaru talk contribs‎ m 7,341 bytes 0‎ →‎Address ($2006) >> write x2
• curprev 09:2109:21, 24 January 2010‎ Tokumaru talk contribs‎ 7,341 bytes +521‎ →‎Scroll ($2005) >> write x2

18 January 2010

• curprev 18:1318:13, 18 January 2010‎ Tepples talk contribs‎ m 6,820 bytes +35‎ →‎OAM data ($2004) read/write: clarified my clarification
• curprev 18:1218:12, 18 January 2010‎ Tepples talk contribs‎ 6,785 bytes +66‎ →‎OAM data ($2004) read/write: clarify

11 June 2009

• curprev 13:4713:47, 11 June 2009‎ Ndwiki talk contribs‎ m 6,719 bytes −7‎ No edit summary
• curprev 13:4013:40, 11 June 2009‎ Ndwiki talk contribs‎ m 6,726 bytes −47‎ No edit summary
• curprev 13:2713:27, 11 June 2009‎ Ndwiki talk contribs‎ m 6,773 bytes +71‎ No edit summary
• curprev 13:1913:19, 11 June 2009‎ Ndwiki talk contribs‎ m 6,702 bytes −11‎ →‎Controller ($2000) [write]
• curprev 13:1913:19, 11 June 2009‎ Ndwiki talk contribs‎ m 6,713 bytes +16‎ →‎Controller ($2000) [write]
• curprev 13:1813:18, 11 June 2009‎ Ndwiki talk contribs‎ m 6,697 bytes +4‎ →‎Controller ($2000) [write]
• curprev 13:1113:11, 11 June 2009‎ Ndwiki talk contribs‎ m 6,693 bytes +9‎ No edit summary
• curprev 13:0913:09, 11 June 2009‎ Ndwiki talk contribs‎ m 6,684 bytes +5,563‎ No edit summary
• curprev 07:4707:47, 11 June 2009‎ Banshaku talk contribs‎ m 1,121 bytes +24‎ No edit summary
• curprev 07:4607:46, 11 June 2009‎ Banshaku talk contribs‎ m 1,097 bytes +15‎ No edit summary
• curprev 07:1107:11, 11 June 2009‎ Banshaku talk contribs‎ m 1,082 bytes 0‎ moved PPU REGISTERS to PPU registers

20 April 2009

• curprev 09:5709:57, 20 April 2009‎ Banshaku talk contribs‎ m 1,082 bytes +1‎ No edit summary
• curprev 09:5309:53, 20 April 2009‎ Banshaku talk contribs‎ m 1,081 bytes +7‎ No edit summary
• curprev 09:5209:52, 20 April 2009‎ Banshaku talk contribs‎ m 1,074 bytes −137‎ No edit summary

17 April 2009

• curprev 05:5205:52, 17 April 2009‎ Banshaku talk contribs‎ m 1,211 bytes +102‎ No edit summary
• curprev 05:5005:50, 17 April 2009‎ Banshaku talk contribs‎ m 1,109 bytes +1,109‎ Created page with 'The PPU exposes only eight memory-mapped registers to the CPU. These nominally sit at $2000 through $2007 in the CPU's address space, but because they're incompletely decoded, th...'