Programming with unofficial opcodes: Revision history

25 February 2023

• curprev 15:3015:30, 25 February 2023‎ Tepples talk contribs‎ 9,603 bytes +94‎ In-ROM breakpoint possibility

2 January 2023

• curprev 06:1706:17, 2 January 2023‎ Lidnariq talk contribs‎ 9,509 bytes +120‎ →‎Combined operations: ALR problematic :(

16 August 2022

• curprev 18:3118:31, 16 August 2022‎ Lidnariq talk contribs‎ 9,389 bytes −30‎ →‎Disadvantages: stop linking to dead wiki and instead to our copy of it

11 October 2020

• curprev 05:5005:50, 11 October 2020‎ Rainwarrior talk contribs‎ 9,419 bytes −795‎ Moving clockslide to Cycle counting

16 October 2018

• curprev 18:3018:30, 16 October 2018‎ Pubby talk contribs‎ 10,214 bytes −3‎ Fix typo

25 October 2017

• curprev 13:5913:59, 25 October 2017‎ Pubby talk contribs‎ m 10,217 bytes +1‎ No edit summary
• curprev 13:5813:58, 25 October 2017‎ Pubby talk contribs‎ 10,216 bytes +117‎ Mention ARR signed division

6 August 2017

• curprev 06:1806:18, 6 August 2017‎ Rainwarrior talk contribs‎ 10,099 bytes −2‎ →‎Clockslide: trimming $00, there is no $00 byte emitted here, the operand being ZP is critical too

24 July 2017

• curprev 16:1616:16, 24 July 2017‎ Tepples talk contribs‎ m 10,101 bytes 0‎ →‎Disadvantages: cc65 proper is a compiler, and it doesn't emit unofficial opcodes to my knowledge

11 May 2017

• curprev 11:1811:18, 11 May 2017‎ Pubby talk contribs‎ 10,101 bytes +118‎ Add DCP common usage.

5 May 2017

• curprev 16:0916:09, 5 May 2017‎ Tepples talk contribs‎ 9,983 bytes +80‎ "Duplicated instructions" above "NOPs" makes the intro to "NOPs" slightly smoother in my opinion
• curprev 16:0516:05, 5 May 2017‎ Tepples talk contribs‎ 9,903 bytes +139‎ Undo revision 13740 by Pubby (talk): This sentence explains the purpose of a variable entry point to a clockslide in the first place
• curprev 05:4805:48, 5 May 2017‎ Pubby talk contribs‎ 9,764 bytes −106‎ →‎Clockslide
• curprev 05:4805:48, 5 May 2017‎ Pubby talk contribs‎ 9,870 bytes −63‎ →‎Clockslide
• curprev 05:4605:46, 5 May 2017‎ Pubby talk contribs‎ m 9,933 bytes +2‎ →‎NOPs
• curprev 05:4605:46, 5 May 2017‎ Pubby talk contribs‎ 9,931 bytes +35‎ →‎NOPs
• curprev 05:3005:30, 5 May 2017‎ Pubby talk contribs‎ 9,896 bytes −1,024‎ Reduce watermarking section. Elaborate NOPs.
• curprev 05:0805:08, 5 May 2017‎ Pubby talk contribs‎ m 10,920 bytes −1‎ →‎RMW instructions
• curprev 05:0705:07, 5 May 2017‎ Pubby talk contribs‎ 10,921 bytes +277‎ Add more uses.
• curprev 05:0005:00, 5 May 2017‎ Pubby talk contribs‎ 10,644 bytes +50‎ Mention common usage.

20 December 2016

• curprev 18:5018:50, 20 December 2016‎ Tepples talk contribs‎ 10,594 bytes +285‎ →‎Disadvantages: Practical implication of non-portability

28 May 2016

• curprev 20:4920:49, 28 May 2016‎ Rainwarrior talk contribs‎ 10,309 bytes −18‎ revising/shortening lead to make it clearer that CPU unofficial opcodes is the primary article and this is a programming guide, moving some of the lead material into "disadvantages" section
• curprev 20:1220:12, 28 May 2016‎ Tepples talk contribs‎ 10,327 bytes +129‎ Document source of ca65's mnemonics

8 February 2016

• curprev 05:5705:57, 8 February 2016‎ Zzo38 talk contribs‎ 10,198 bytes +90‎ No edit summary

29 July 2015

• curprev 07:3007:30, 29 July 2015‎ Rainwarrior talk contribs‎ m 10,108 bytes +4‎ PowerPak

29 June 2015

• curprev 02:4102:41, 29 June 2015‎ Zzo38 talk contribs‎ 10,104 bytes +139‎ No edit summary

27 June 2015

• curprev 21:0921:09, 27 June 2015‎ Zzo38 talk contribs‎ 9,965 bytes +82‎ No edit summary

22 August 2014

• curprev 13:0313:03, 22 August 2014‎ Rainwarrior talk contribs‎ m 9,883 bytes −40‎ removing lot check speculation

9 August 2014

• curprev 17:1017:10, 9 August 2014‎ Zzo38 talk contribs‎ 9,923 bytes +5‎ No edit summary
• curprev 03:4403:44, 9 August 2014‎ Tepples talk contribs‎ 9,918 bytes +132‎ →‎Combined operations: Each LAX addressing mode is the same as one of LDA's, so LDA then TAX is probably slightly better

23 January 2014

• curprev 21:1421:14, 23 January 2014‎ Lidnariq talk contribs‎ m 9,786 bytes −24‎ →‎Watermarking instructions: missed replacing one "LDD" with "IGN". Also, I don't think anyone but me ever called it "LDD", so let's just omit that.
• curprev 19:4119:41, 23 January 2014‎ Tepples talk contribs‎ m 9,810 bytes +72‎ power-up behavior too

29 November 2013

• curprev 04:3404:34, 29 November 2013‎ Tepples talk contribs‎ 9,738 bytes +1,080‎ Clockslide, adapted from an article by Eighty5cacao on another wiki

24 November 2013

• curprev 08:1408:14, 24 November 2013‎ Lidnariq talk contribs‎ m 8,658 bytes −19‎ →‎Watermarking instructions: fix link (hopefully)
• curprev 06:1706:17, 24 November 2013‎ Tepples talk contribs‎ 8,677 bytes +156‎ →‎Watermarking instructions: Beauty and the $80

17 November 2013

• curprev 15:3115:31, 17 November 2013‎ Tepples talk contribs‎ m 8,521 bytes −9‎ wiki.nesdev.com is not a trusted Referer on romhacking.net

12 October 2013

• curprev 12:2512:25, 12 October 2013‎ Tepples talk contribs‎ 8,530 bytes +829‎ →‎Watermarking instructions: from talk: IGN a; IGN a,x; IGN d; IGN d,x

23 August 2013

• curprev 12:3712:37, 23 August 2013‎ Tepples talk contribs‎ 7,701 bytes −1‎ I have received a report through a talk page on another wiki that anyplatform.net has died (GET / returns error 403)

13 April 2013

• curprev 20:4920:49, 13 April 2013‎ Tepples talk contribs‎ 7,702 bytes +136‎ →‎Watermarking instructions: relationship between SKB and NOP, per something brought up on my own wiki

21 March 2012

• curprev 14:4814:48, 21 March 2012‎ Tepples talk contribs‎ 7,566 bytes +48‎ →‎Combined operations: byuu wants to standardize the mnemonics for unofficial instructions. I suggested using the ca65 ones.

8 March 2012

• curprev 15:5115:51, 8 March 2012‎ Tepples talk contribs‎ 7,518 bytes +81‎ →‎Watermarking instructions: Puzznic uses SKB89

13 December 2011

• curprev 17:4317:43, 13 December 2011‎ Tepples talk contribs‎ 7,437 bytes +471‎ →‎Combined operations: Origin of the AND behavior of SAX, SBX, and the like

12 December 2011

• curprev 03:2803:28, 12 December 2011‎ Tepples talk contribs‎ m 6,966 bytes −5‎ →‎Combined operations: TXA is shorter than LDA #$FF here and produces the same result in the AND subexpression

9 September 2011

• curprev 18:5418:54, 9 September 2011‎ Tepples talk contribs‎ 6,971 bytes +60‎ →‎Combined operations: How SBX might be used

31 May 2011

• curprev 11:0711:07, 31 May 2011‎ Tepples talk contribs‎ m 6,911 bytes +50‎ PowerPak open bus behavior differs

12 April 2011

• curprev 14:4714:47, 12 April 2011‎ Tepples talk contribs‎ 6,861 bytes +23‎ →‎Combined operations: alternate name for SBX
• curprev 14:3514:35, 12 April 2011‎ Tepples talk contribs‎ 6,838 bytes +94‎ thanks lidnariq for the pointer to the explanation

9 March 2011

• curprev 01:4601:46, 9 March 2011‎ Tepples talk contribs‎ 6,744 bytes +230‎ →‎Watermarking instructions: SKB89 kinda-sorta works even on the 65C02

8 February 2011

• curprev 16:2616:26, 8 February 2011‎ Tepples talk contribs‎ 6,514 bytes −103‎ Undo revision 2333 by Jwdonal (Talk): ATX is more complicated than that. See Talk:Programming with unofficial opcodes#Stability of ATX.
• curprev 07:1307:13, 8 February 2011‎ Jwdonal talk contribs‎ 6,617 bytes +103‎ →‎Combined operations: added missing instruction