Program counter: Revision history

21 June 2025

• curprev 23:4323:43, 21 June 2025 Guy Harris talk contribs 12,444 bytes +45 Undid revision 1296734078 by 129.205.124.208 (talk) - rv damage undo Tag: Undo
• curprev 22:3222:32, 21 June 2025 129.205.124.208 talk 12,399 bytes −45 No edit summary undo Tags: Reverted Visual edit Mobile edit Mobile web edit

19 June 2025

• curprev 12:5312:53, 19 June 2025 HeinrichZHM talk contribs m 12,444 bytes −5 Changed reference from general bus to memory bus undo

14 April 2025

• curprev 01:1801:18, 14 April 2025 Citation bot talk contribs 12,449 bytes +1 Added pages. Removed parameters. Some additions/deletions were parameter name changes. | Use this bot. Report bugs. | Suggested by Dominic3203 | Category:Digital registers | #UCB_Category 19/37 undo

31 March 2025

• curprev 15:4615:46, 31 March 2025 Spike-from-NH talk contribs m 12,448 bytes −1 Post-edit Guy Harris--typo undo
• curprev 01:5501:55, 31 March 2025 Guy Harris talk contribs 12,449 bytes −5 Processors fetch from main memory; if it's not in main memory, it takes a {page, segment} not present fault, software pages it in, and the attempt is restarted. undo
• curprev 01:2301:23, 31 March 2025 Guy Harris talk contribs 12,454 bytes −21 →Consequences in high-level programming: Get rid of unnecessary piping. undo

1 March 2025

• curprev 08:1708:17, 1 March 2025 演歌ビニール talk contribs 12,475 bytes +96 Add template & links undo

13 September 2024

• curprev 06:4206:42, 13 September 2024 Guy Harris talk contribs 12,379 bytes −1 Undid revision 1245454285 by 106.77.25.124 (talk) - whether it's an inverted comma or an apostrophe, it doesn't belong there; "let's" is an abbreviation for "let us", while "lets" is the present tense of the verb "to let", meaning, in this case, "to allow". undo Tag: Undo
• curprev 02:2302:23, 13 September 2024 106.77.25.124 talk 12,380 bytes +1 Just added inverted comma in lets let's undo Tags: Reverted Visual edit Mobile edit Mobile web edit

5 September 2024

• curprev 14:0114:01, 5 September 2024 Cancus123 talk contribs 12,379 bytes +574 →top: Adding/improving reference(s) undo

10 May 2024

• curprev 12:2312:23, 10 May 2024 Apetzke talk contribs m 11,805 bytes +4 →Hardware implementation: Added a missing "the" undo Tags: Mobile edit Mobile app edit Android app edit

5 April 2024

• curprev 22:3822:38, 5 April 2024 Citation bot talk contribs 11,801 bytes +23 Added publisher. | Use this bot. Report bugs. | Suggested by Whoop whoop pull up | #UCB_webform 1213/3364 undo

24 December 2023

• curprev 11:5011:50, 24 December 2023 InTheCastle talk contribs m 11,778 bytes 0 Capitalized the first letter of the author's first and last name. undo

15 December 2023

• curprev 01:2901:29, 15 December 2023 WikiCleanerBot talk contribs m 11,778 bytes 0 v2.05b - Bot T20 CW#61 - Fix errors for CW project (Reference before punctuation) undo Tag: WPCleaner

29 November 2023

• curprev 10:1510:15, 29 November 2023 InTheCastle talk contribs m 11,778 bytes +182 Added reference for PC and IAR. undo

6 November 2023

• curprev 09:5109:51, 6 November 2023 Kku talk contribs m 11,596 bytes +4 link [pP]arallel computing undo

8 September 2023

• curprev 21:2921:29, 8 September 2023 Guy Harris talk contribs 11,592 bytes −780 Most of those are symbols that refer to the address of the current instruction in expressions evaluated at assembly time, which is more of a topic for assembly language. The DEC example is, however, for references to the PC at *run* time (as I remember, "." was used for the address of the current instruction). The 1130 is a style convention using the "*" symbol for the current instruction address in an expression to flag something for *human* readers. Not clear any of this is relevant. undo
• curprev 20:1220:12, 8 September 2023 Spike-from-NH talk contribs 12,372 bytes +276 →Symbol: Post-edit Tea2min--Mince words, use <code> for symbols, mention DEC, IBM 1130 (*-*) undo

5 September 2023

• curprev 08:3908:39, 5 September 2023 Tea2min talk contribs 12,096 bytes 0 Undid revision 1173935554 by 81.31.122.234 (talk) undo Tag: Undo
• curprev 08:3608:36, 5 September 2023 81.31.122.234 talk 12,096 bytes 0 →Symbol undo Tag: Reverted

13 July 2023

• curprev 17:0217:02, 13 July 2023 RastaKins talk contribs 12,096 bytes +5 →Hardware implementation: Updated name of AVR undo

17 October 2022

• curprev 08:2608:26, 17 October 2022 Greyjoy talk contribs 12,091 bytes +653 No edit summary undo Tag: Undo
• curprev 08:2508:25, 17 October 2022 51.155.26.162 talk 11,438 bytes −652 No edit summary undo Tag: Reverted
• curprev 08:2508:25, 17 October 2022 51.155.26.162 talk 12,090 bytes −5 No edit summary undo Tag: Reverted
• curprev 08:2008:20, 17 October 2022 51.155.26.162 talk 12,095 bytes +4 Fixing something undo Tag: Reverted

4 October 2022

• curprev 07:3507:35, 4 October 2022 Tropicalkitty talk contribs m 12,091 bytes −8 Undid edits by 2001:D08:1384:8B74:5829:587D:D61C:FAC3 (talk) to last revision by Ffffrr undo Tags: Undo SWViewer [1.4]
• curprev 07:3407:34, 4 October 2022 2001:d08:1384:8b74:5829:587d:d61c:fac3 talk 12,099 bytes +8 No edit summary undo Tags: Reverted Mobile edit Mobile web edit

15 April 2022

• curprev 20:5620:56, 15 April 2022 Ffffrr talk contribs 12,091 bytes +100 Adding local short description: "Processor register that indicates where a computer is in its program sequence", overriding Wikidata description "processor register that indicates the location in memory of the currently-executing instruction in the binary code of a program" (Shortdesc helper) undo

28 October 2020

• curprev 16:5916:59, 28 October 2020 ClueBot NG talk contribs m 11,991 bytes −23 Reverting possible vandalism by 2806:101E:D:8EE0:804C:E613:1BED:6938 to version by JCW-CleanerBot. Report False Positive? Thanks, ClueBot NG. (3809663) (Bot) undo Tag: Rollback
• curprev 16:5916:59, 28 October 2020 2806:101e:d:8ee0:804c:e613:1bed:6938 talk 12,014 bytes +23 →Hardware implementation: I added a great salute to everyone. undo Tag: Reverted

5 July 2020

• curprev 23:4223:42, 5 July 2020 JCW-CleanerBot talk contribs m 11,991 bytes +6 →References: task, replaced: publisher=Wiley (publisher) → publisher=Wiley undo Tag: AWB

23 March 2020

• curprev 17:5517:55, 23 March 2020 Guy Harris talk contribs 11,985 bytes +8 →Hardware implementation: Copyedit. undo
• curprev 08:3908:39, 23 March 2020 Murray Langton talk contribs m 11,977 bytes 0 →Hardware implementation: spelling undo

19 March 2020

• curprev 01:3801:38, 19 March 2020 Guy Harris talk contribs 11,977 bytes −16 What does microprogramming have to do with it, and was the ARM7 core microcoded or hardwired? undo
• curprev 00:4600:46, 19 March 2020 TRANSviada talk contribs m 11,993 bytes +2 auto format script undo
• curprev 00:4300:43, 19 March 2020 TRANSviada talk contribs 11,991 bytes +448 add <ref name="Silberschatz_2018"> undo

28 February 2020

• curprev 20:4020:40, 28 February 2020 Matthiaspaul talk contribs 11,543 bytes +994 mentioned wrapping PCs undo
• curprev 20:1120:11, 28 February 2020 Matthiaspaul talk contribs 10,549 bytes 0 →References: fixed date undo
• curprev 19:5919:59, 28 February 2020 Matthiaspaul talk contribs 10,549 bytes +60 CE, improved ref undo
• curprev 15:0715:07, 28 February 2020 Matthiaspaul talk contribs 10,489 bytes +383 →References: improved ref undo
• curprev 14:2314:23, 28 February 2020 Matthiaspaul talk contribs 10,106 bytes −2 changed boldface into italics per MOS undo
• curprev 09:5209:52, 28 February 2020 Matthiaspaul talk contribs 10,108 bytes +1,436 CE, added info on PC symbol, added and improved refs undo

14 November 2019

• curprev 14:2614:26, 14 November 2019 Trappist the monk talk contribs m 8,672 bytes −4 →top: cite repair; undo
• curprev 07:2007:20, 14 November 2019 InternetArchiveBot talk contribs 8,676 bytes +81 Bluelink 1 book for verifiability.) #IABot (v2.0) (GreenC bot undo

23 October 2019

• curprev 23:2523:25, 23 October 2019 Spike-from-NH talk contribs 8,595 bytes −30 →Hardware implementation: Rephrase in two places: (1) Simple CPUs don't necessarily have "many" registers; (2) "handled identically" is unclear; instructions vs data are fetched identically but not "handled" identically undo

22 October 2019

• curprev 14:5814:58, 22 October 2019 Spike-from-NH talk contribs 8,625 bytes −1 →Hardware implementation: Change "typical" to "simple", as hardware PCs might not be typical. Move "." in footnote undo

21 October 2019

• curprev 13:2013:20, 21 October 2019 Spike-from-NH talk contribs 8,626 bytes +486 Revert self but move previous edit to "Notes"; see talk page undo
• curprev 02:1402:14, 21 October 2019 Spike-from-NH talk contribs 8,140 bytes −341 Undid revision 921904666 by Mildsunrise (no other edits) (no response on his talk page)--I find his citation refers to LDR/STR instructions that can add a constant to PC (R15), not to his assertion that PC points to "the current instruction plus a processor-dependent constant." undo Tag: Undo

18 October 2019

• curprev 17:2717:27, 18 October 2019 Mildsunrise talk contribs 8,481 bytes +341 in some architectures, PC may have an arbitrary constant added to it undo