Illegal opcode: Revision history

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curprev 05:0005:00, 28 May 2025 WikiCleanerBot talk contribs m 9,879 bytes −2 v2.05b - Bot T20 CW#61 - Fix errors for CW project (Reference before punctuation) undo Tag: WPCleaner

curprev 12:1112:11, 23 May 2025 158.62.21.128 talk 9,881 bytes 0 →Overview undo

curprev 20:2420:24, 11 May 2025 Arjayay talk contribs m 9,881 bytes −2 Duplicate word removed undo
curprev 15:1615:16, 11 May 2025 93.146.143.24 talk 9,883 bytes −71 No edit summary undo

curprev 08:1608:16, 25 February 2025 67.209.130.68 talk 9,954 bytes +7 reform thumbnail caption undo

curprev 02:1902:19, 24 February 2025 67.209.128.176 talk 9,947 bytes −52 →See also: remove two possibly unrelated entries, feel free to revert if i'm wrong undo Tags: Mobile edit Mobile web edit

curprev 18:4318:43, 24 September 2024 Dgpop talk contribs 9,999 bytes −22 phrasing, updated link undo

curprev 23:1623:16, 14 August 2024 Citation bot talk contribs 10,021 bytes +21 Added date. | Use this bot. Report bugs. | Suggested by Abductive | Category:Machine code | #UCB_Category 3/20 undo

curprev 18:4218:42, 20 September 2023 Matthiaspaul talk contribs 10,000 bytes +28 →See also: +link undo

curprev 19:1619:16, 15 September 2023 Bumm13 talk contribs m 9,972 bytes 0 →See also: punctuation fix undo
curprev 19:1519:15, 15 September 2023 Bumm13 talk contribs m 9,972 bytes +51 pointed "Apple II" wikilink to "Apple II series" -- (disambiguation) undo

curprev 03:2903:29, 19 January 2023 Guy Harris talk contribs 9,921 bytes −117 →Further reading: It's live. The archived version points to archived versions of the PDF and the TeX source, so no need for us to archive them ourselves. undo
curprev 02:5802:58, 19 January 2023 InternetArchiveBot talk contribs 10,038 bytes −92 Rescuing 1 sources and tagging 0 as dead.) #IABot (v2.0.9.3 undo

curprev 09:5109:51, 21 July 2022 Tetraxile talk contribs 10,130 bytes 0 →top: Fixed typo undo Tags: canned edit summary Mobile edit Mobile app edit Android app edit

curprev 08:1908:19, 8 July 2022 Sandstein talk contribs m 10,130 bytes −44 Removing link(s) Wikipedia:Articles for deletion/List of undocumented x86 instructions closed as delete (XFDcloser) undo

curprev 00:5600:56, 29 June 2022 Punpcklbw talk contribs m 10,174 bytes +8 →See also: Updated undocumented-x86 link undo

curprev 09:2409:24, 13 May 2022 Guy Harris talk contribs 10,166 bytes +108 Use "trap" for the illegal instruction action (trap (computing) just redirects to interrupt, but it more clearly distinguishes the effect from an asynchronous interrupt from an I/O device). Note that every processors that trap on most illegal opcodes might not do so for *all* illegal opcodes. undo
curprev 09:0809:08, 13 May 2022 Guy Harris talk contribs 10,058 bytes +214 Note that, on many processors, those opcodes just cause a Boring Old Illegal Instruction Trap; they don't do something interesting. undo
curprev 09:0209:02, 13 May 2022 Guy Harris talk contribs 9,844 bytes −12 Clean up reference. (And note that the previous edit summary was to say "(although it also uses "unimplemented operations" to refer to documentation-defined opcodes on processors that don't have the optional feature for those opcodes installed)".) undo
curprev 08:5908:59, 13 May 2022 Guy Harris talk contribs 9,856 bytes −187 In the previous reference, that section speaks of *privileged instructions run in user mode* as "illegal operation codes"; those are *not* instructions not mentioned in the documentation, as they *are* mentioned. Point to a section in the *processor* manual about opcodes that aren't assigned (although it uses undo

curprev 19:3419:34, 20 March 2022 Citation bot talk contribs 10,043 bytes +21 Add: website. | Use this bot. Report bugs. | Suggested by Whoop whoop pull up | #UCB_toolbar undo

curprev 21:1421:14, 10 January 2022 Cewbot talk contribs m 10,022 bytes +1 Normalize {{Multiple issues}}: Merge 1 template(s) into {{Multiple issues}}: Split undo

curprev 04:3104:31, 5 January 2022 JPxG talk contribs 10,021 bytes +4 →Overview undo

curprev 14:2614:26, 3 January 2022 Matthiaspaul talk contribs 10,017 bytes +48 →Overview: +links undo
curprev 14:1314:13, 3 January 2022 Matthiaspaul talk contribs 9,969 bytes +23 →See also: +link undo
curprev 05:4305:43, 3 January 2022 Guy Harris talk contribs 9,946 bytes −452 The PDP-6 and PDP-10 reserved opcodes 000 through 077 as traps - they're not undocumented - and the PDP-10, at least, reserved half of them for traps into the OS, so, yes, the PDP-10 *did* have system call instructions (the PDP-6 might not have had "trap to user mode" UUOs, so they might all have been inteded for system calls). Remove a paragraph that claims otherwise. undo
curprev 00:4200:42, 3 January 2022 Matthiaspaul talk contribs 10,398 bytes +36 →See also: +link undo

curprev 14:1414:14, 1 January 2022 Matthiaspaul talk contribs 7,764 bytes +16 →See also: +link undo

curprev 16:0916:09, 31 December 2021 Matthiaspaul talk contribs 7,748 bytes +51 +ldr undo

curprev 14:2214:22, 29 December 2021 AnomieBOT talk contribs m 7,697 bytes +19 Dating maintenance tags: {{Split}} undo
curprev 14:0214:02, 29 December 2021 Chatul talk contribs 7,678 bytes +99 Split proposed undo

curprev 02:4602:46, 20 December 2021 Rlink2 talk contribs m 7,579 bytes +130 →References: Fixing archives for YouTube videos (WP:Link_Rot, WP:CEFC#Pre-emptive_archiving, phab:T294880) undo Tag: AWB

curprev 23:4623:46, 22 November 2021 WikiCleanerBot talk contribs m 7,449 bytes 0 v2.04b - Bot T20 CW#61 - Fix errors for CW project (Reference before punctuation) undo Tag: WPCleaner
curprev 18:1918:19, 22 November 2021 Matthiaspaul talk contribs 7,449 bytes +1 →References: improved ref undo

curprev 00:3800:38, 20 November 2021 Matthiaspaul talk contribs 7,448 bytes +439 CE, +ref undo

curprev 21:5821:58, 19 November 2021 Matthiaspaul talk contribs 7,009 bytes +11 →top: +link undo
curprev 21:5621:56, 19 November 2021 Matthiaspaul talk contribs 6,998 bytes +1,879 CE, added and improved refs undo

curprev 21:3921:39, 12 August 2021 Rfc1394 talk contribs m 5,119 bytes −4 used wrong name for system call undo
curprev 21:3321:33, 12 August 2021 Rfc1394 talk contribs 5,123 bytes +585 →Overview: PDP10/20 undo

curprev 10:2110:21, 3 July 2021 Qwerfjkl talk contribs m 4,538 bytes −3 Removed 'a(n)' from the beginning of the short description per WP:SDFORMAT, from a request at Wikipedia:Reward board. (via WP:JWB) undo

curprev 00:1600:16, 6 December 2020 Riventree talk contribs m 4,541 bytes −38 →Overview: Definitely NOT guaranteed on any of the specified processors by Intel undo

curprev 20:3220:32, 8 September 2020 Soap talk contribs 4,579 bytes +1 past tense undo

curprev 15:3315:33, 5 August 2020 Matthiaspaul talk contribs 4,578 bytes +38 →See also: +link undo

curprev 23:4323:43, 16 July 2020 73.175.235.152 talk 4,540 bytes −66 →Overview: Grammatical and phrasing corrections undo

curprev 11:0211:02, 18 June 2020 Widefox talk contribs 4,606 bytes +73 Adding short description: "An undocumented CPU instruction that has an effect" (Shortdesc helper) undo

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