PPU power up state: Revision history

7 January 2023

• curprev 19:1119:11, 7 January 2023‎ Rainwarrior talk contribs‎ m 7,334 bytes +1‎ →‎Famicom: missing period
• curprev 18:1618:16, 7 January 2023‎ Rainwarrior talk contribs‎ 7,333 bytes +56‎ →‎Famicom: Note the connection between these two games is Aicom.
• curprev 17:5917:59, 7 January 2023‎ Rainwarrior talk contribs‎ 7,277 bytes +20‎ needed references block, forgot closing tag as well
• curprev 17:5917:59, 7 January 2023‎ Rainwarrior talk contribs‎ 7,257 bytes +370‎ →‎Famicom: adding The Lord of King example and reference

1 July 2021

• curprev 16:1416:14, 1 July 2021‎ Tepples talk contribs‎ 6,887 bytes +719‎ →‎Dendy: Multiple of 8 caveat, contributed by eugene-s and Fiskbit in NESdev Discord #research

7 March 2020

• curprev 06:3706:37, 7 March 2020‎ Rainwarrior talk contribs‎ 6,168 bytes +114‎ →‎Famicom: clarify that /reset and "reset' and presseting the reset button are different cases here. The timing difference is for power-on only

5 March 2020

• curprev 22:3822:38, 5 March 2020‎ Dwedit talk contribs‎ 6,054 bytes +680‎ Famicom PPU resets early

26 December 2019

• curprev 18:3318:33, 26 December 2019‎ Tepples talk contribs‎ 5,374 bytes −5‎ Try again, using Sour's wording for NES-001 difference. Apparently the only clear way to express this is to use CPU-centric wording even in an otherwise PPU-centric page.
• curprev 17:1517:15, 26 December 2019‎ Tepples talk contribs‎ 5,379 bytes 0‎ some_canuck on NESdev Discord misread this as "resets the PPU only". Move "only" past the preposition to rule out this misreading.

26 July 2018

• curprev 19:2419:24, 26 July 2018‎ Tepples talk contribs‎ 5,379 bytes +100‎ Entropy that may exist in the unspecified values
• curprev 19:1619:16, 26 July 2018‎ Tepples talk contribs‎ 5,279 bytes +553‎ "pattern" and "mostly" get confusing. Per https://forums.nesdev.com/viewtopic.php?f=3&t=17584 is there even a benefit in describing what a particular lot is "mostly" set to?

28 May 2015

• curprev 20:0020:00, 28 May 2015‎ Rainwarrior talk contribs‎ 4,726 bytes +85‎ top of picture applies to power, blargg's test suggests vblank is random at power, not usually clear

25 March 2015

• curprev 02:5502:55, 25 March 2015‎ Rainwarrior talk contribs‎ m 4,641 bytes −14‎ resolve redirect to PPU scrolling

24 March 2015

• curprev 23:5923:59, 24 March 2015‎ Rainwarrior talk contribs‎ m 4,655 bytes +2‎ image diagram is part of a larger article on frame timing (we shouldn't substitute image for article)

16 March 2015

• curprev 02:5302:53, 16 March 2015‎ Koitsu talk contribs‎ 4,653 bytes +13‎ No edit summary
• curprev 02:0702:07, 16 March 2015‎ Koitsu talk contribs‎ 4,640 bytes +191‎ No edit summary
• curprev 01:3801:38, 16 March 2015‎ Koitsu talk contribs‎ 4,449 bytes +34‎ No edit summary

19 January 2015

• curprev 16:4216:42, 19 January 2015‎ Tepples talk contribs‎ 4,415 bytes +240‎ clarify what memory is external to the PPU per talk

18 January 2015

• curprev 22:1522:15, 18 January 2015‎ Ulfalizer talk contribs‎ 4,175 bytes −26‎ Simplify explanation a bit more.
• curprev 22:1222:12, 18 January 2015‎ Ulfalizer talk contribs‎ 4,201 bytes −27‎ Reformulate and reorganize a bit for readability.
• curprev 22:0122:01, 18 January 2015‎ Ulfalizer talk contribs‎ 4,228 bytes −313‎ Remove bullet point. Just noticed that the explanation is already given further down.
• curprev 21:5621:56, 18 January 2015‎ Ulfalizer talk contribs‎ m 4,541 bytes −20‎ Slight reformulation.
• curprev 21:5521:55, 18 January 2015‎ Ulfalizer talk contribs‎ 4,561 bytes +333‎ Explain why writes to certain registers are ignored after reset.
• curprev 21:4921:49, 18 January 2015‎ Tepples talk contribs‎ 4,228 bytes +167‎ Reset button differs between front- and top-loaders

11 September 2014

• curprev 03:5503:55, 11 September 2014‎ Koitsu talk contribs‎ 4,061 bytes −16‎ Removal of syntax highlighter

10 August 2014

• curprev 17:3917:39, 10 August 2014‎ Tepples talk contribs‎ 4,077 bytes +40‎ →‎References: see also CPU

2 February 2014

• curprev 16:0816:08, 2 February 2014‎ Rainwarrior talk contribs‎ 4,037 bytes +184‎ note about rendering during warmup

25 August 2013

• curprev 07:2007:20, 25 August 2013‎ Koitsu talk contribs‎ 3,853 bytes −4‎ No edit summary

24 August 2013

• curprev 09:0309:03, 24 August 2013‎ Koitsu talk contribs‎ 3,857 bytes −3‎ →‎Best practice
• curprev 08:5708:57, 24 August 2013‎ Koitsu talk contribs‎ 3,860 bytes +22‎ No edit summary
• curprev 08:5508:55, 24 August 2013‎ Koitsu talk contribs‎ 3,838 bytes +3‎ →‎Best practice
• curprev 08:5408:54, 24 August 2013‎ Koitsu talk contribs‎ 3,835 bytes +23‎ →‎Best practice

28 June 2013

• curprev 17:1617:16, 28 June 2013‎ Quietust talk contribs‎ 3,812 bytes +13‎ don't call them "loopy's registers" - one is a latch, while the other is the actual address
• curprev 02:5202:52, 28 June 2013‎ Ulfalizer talk contribs‎ 3,799 bytes +44‎ Reset signal only clears loopy's t, not v

27 June 2013

• curprev 18:4918:49, 27 June 2013‎ Ulfalizer talk contribs‎ 3,755 bytes +2‎ Reset signals sets up an even frame
• curprev 18:3018:30, 27 June 2013‎ Ulfalizer talk contribs‎ 3,753 bytes +33‎ Internal reset signal also clears the $2007 read buffer
• curprev 18:2318:23, 27 June 2013‎ Ulfalizer talk contribs‎ 3,720 bytes +17‎ Clarify that dot 1 is the second dot
• curprev 18:1918:19, 27 June 2013‎ Ulfalizer talk contribs‎ 3,703 bytes +22‎ Fine x scroll is also cleared by the internal reset signal
• curprev 18:1518:15, 27 June 2013‎ Ulfalizer talk contribs‎ 3,681 bytes +396‎ Fill in details derived from Visual 2C02 for what happens on reset

24 March 2013

• curprev 04:0004:00, 24 March 2013‎ Quietust talk contribs‎ 3,285 bytes −3‎ I've traced circuitry inside the 2C02 which forces $2000, $2001, fine-X, VRAMaddr_T (but not VRAMaddr_V), and the $2007 read buffer to zero for the entire duration of the first frame

27 December 2012

• curprev 20:2320:23, 27 December 2012‎ Lidnariq talk contribs‎ m 3,288 bytes +171‎ oamaddr gotcha

19 September 2012

• curprev 13:2313:23, 19 September 2012‎ Tepples talk contribs‎ 3,117 bytes +171‎ confirmations and clarifications per nocash

26 December 2010

• curprev 02:2202:22, 26 December 2010‎ Tepples talk contribs‎ 2,946 bytes +20‎ make a section "Best practice" so that Programming guide can link to it

24 June 2010

• curprev 13:2113:21, 24 June 2010‎ Tepples talk contribs‎ 2,926 bytes +151‎ link back to init code

28 November 2009

• curprev 07:2507:25, 28 November 2009‎ Tepples talk contribs‎ 2,775 bytes +669‎ known working loops

11 June 2009

• curprev 07:2207:22, 11 June 2009‎ Banshaku talk contribs‎ m 2,106 bytes +2,106‎ Created page with 'In March 2008, Blargg reverse-engineered the power-up/reset state and behavior of the NES PPU, NTSC version. {| border=1 |+ Initial Register Values ! Register ! At Power ! A...'