Related changes

4 May 2025

• diffhist Google 08:25 −1 Unis Tankos talk contribs
• diffhist Memory management unit 06:06 −774 Guy Harris talk contribs (→Segmented translation: The PDP-11 MMU is more like segmentation than paging.)

3 May 2025

• diffhist X86 memory segmentation 19:53 +7 Alexander Davronov talk contribs ("system programmer") Tag: Visual edit
• diffhist Memory management unit 07:59 +16 Guy Harris talk contribs (→Paged translation: De-hyphenate "64-bits" ("64-bit", as an adjective, is hyphenated; "64 bits", as a coined number of bits, isn't, in English). Mention additional pages of the Spectra 70 model 70/46 manual that are about address translation. Fix title - it's 70/46, not 70-46, and it's the *Processor Reference Manual*, not the Processor Manual.)
• diffhist Memory management unit 07:48 0 Guy Harris talk contribs (→Paged translation: Fix autoincorrection from a typo that resulted in a different typo.)
• diffhist Memory management unit 07:47 −711 Guy Harris talk contribs (→Paged translation: Speak in general terms, rather than specifically discussing a particular type of MMU for a Motorola 68000. Move some stuff around and remove redundancy.)
• diffhist Memory management unit 07:36 −613 Guy Harris talk contribs (MMUs with protection bits are only "modern" if you consider the mid-to-late 1960s and the 1970s to be "modern times". Get rid of the "paged translation" vs. "demand paging" stuff, which doesn't reflect reality (or, at least, pre-early-Motorola-68000-MMU reality) well. (Leave the bank-switching stuff; that needs to be treated better if relevant or removed if not.))
• diffhist Memory management unit 06:34 +8 Guy Harris talk contribs (There is no guarantee that virtual addresses are placed on the memory bus; some older microprocessor CPUs that didn't have on-chip MMUs may have put addresses on the CPU's memory bus, with the MMU attached to the address lines of the CPU's memory bus translating those addresses and putting them on the address lines of the bus to which memory is connected, but not all CPUs (microprocessor or not) worked that way, and modern CPUs have the MMU as part of the CPU.)
• diffhist Memory management unit 02:43 −23 Guy Harris talk contribs (→Paged translation: The program does *not* see its memory as a single contiguous block in the segmented case; it sees it as a set of segments, each of which is a *separate* contiguous block. Fix grammar while we're at it.)
• diffhist Memory management unit 02:42 −2 Guy Harris talk contribs (→Paged translation: Say "to store a set of mapping information" so that the "that holds a set of..." doesn't run the risk of looking as if it applies only to the last entry in the list of non-page-table MMUs.)
• diffhist Memory management unit 02:40 +9 Guy Harris talk contribs (→Paged translation: Speak of a set of registers for a translation-register MMU.)
• diffhist Memory management unit 02:39 +29 Guy Harris talk contribs (→Paged translation: Refer to the static RAM as a one-or-more-level array; the Zehr paper's "paged translation" used a single-level array, which has the same problem as a single-level in-memory page table, namely that the array of page table entries can't be sparse and it gets difficult to handle a large address space. Sun's static-RAM MMUs were multi-level. (And, yes, you can do demand paging with a static-RAM MMU.))
• diffhist Memory management unit 01:57 +14 Guy Harris talk contribs (Discuss IOMMUs in their own section.)
• diffhist Memory management unit 01:55 −497 Guy Harris talk contribs (→Paged translation: Some reshuffling and removal of duplicate information.)
• diffhist Memory management unit 01:50 −20 Guy Harris talk contribs (Put the "modern systems" stuff into the "paged translation" section, as they're discussing the same topic. The next step is to remove redundancy.)
• diffhist Memory management unit 01:42 −21 Guy Harris talk contribs (→Segmented translation: Start out with a description of how segmentation works; link "segment" to memory segmentation, which gives more details. Take text from memory segmentation#x86 architecture to describe the 8086/8088/80186/80188 flavor of segmentation, and note that the 80286 and later had a more normal flavor, with a segment table. Comment out the PDP-11 stuff for now. Remove stuff about Mac non-MMU schemes.)
• diffhist Memory management unit 00:05 0 Guy Harris talk contribs (→Types of address translation: Put paged translation before segmentation plus paging. (The section on paged will be fixed not to claim it differs from what is used now.))
• diffhist Memory management unit 00:03 +10 Guy Harris talk contribs (→Historical systems: Use this section to describe the different types of translation, including paged (the description of which will cover modern paged translation).)

2 May 2025

• diffhist Memory management unit 23:55 −71 Guy Harris talk contribs (Start out with a history section, mentioning segmentation, segmentation+paging, and paging. This needs a lot more work to get rid of the notion of "paged translation" and "paging"/"demand paging"/whatever being two different things. (No, the 68000-systems reference isn't correct; they *aren't* different things. The author's a hardware engineer, and doesn't seem to be familiar with Sun's 68k-based pre-68030 systems, so maybe he doesn't get what "demand paging" is about.))
• diffhist Memory management unit 23:34 +208 Guy Harris talk contribs (Use the Wayback Machine for a now-dead link.)
• diffhist m IBM 19:19 0 Eletroboss talk contribs (→Mainframe computers)

1 May 2025

• diffhist Memory paging 16:46 −1 K1767 talk contribs (→Main memory the same size as virtual memory: Try to fix a grammar error.)
• diffhist Memory paging 16:35 −14 K1767 talk contribs (→AmigaOS 4: Try to clarify text.)
• diffhist Memory paging 15:47 −8 K1767 talk contribs (→Page faults: Try to simplify a sentence.)
• diffhist Memory paging 15:30 +25 K1767 talk contribs (Try to make a sentence clearer by splitting it into two sentences.)
• diffhist m Finalizer 04:59 +23 Rcfische2 talk contribs (backlink navbox)
• diffhist C dynamic memory allocation 02:05 −9 Guy Harris talk contribs (Undid revision 1288188487 by 2A10:D8C5:3CF9:5D9E:49D0:734F:C1E6:E4F9 (talk) - rv randomness) Tag: Undo
• diffhist C dynamic memory allocation 02:04 +42 Guy Harris talk contribs (Undid revision 1286361667 by 119.152.143.49 (talk) - rvv) Tag: Undo
• diffhist C dynamic memory allocation 01:42 +9 2a10:d8c5:3cf9:5d9e:49d0:734f:c1e6:e4f9 talk (→Disadvantages to casting) Tag: Reverted

30 April 2025

• diffhist Memory management unit 19:53 +563 DavidCary talk contribs (mention IOMMU and link to related articles, etc.)
• diffhist Google 12:36 +39 Theofunny talk contribs (Undid revision 1287890509 by Mast303 (talk)) Tag: Undo
• diffhist Google 06:23 +4 Sumanuil talk contribs (→Hardware: This is a file name. It's not a "typo" and it doesn't need "fixing".)
• diffhist m Google 05:09 +320 Wikipedialuva talk contribs (Cleaned up using AutoEd, script-assisted date audit and style fixes per MOS:NUM)
• diffhist m Google 05:07 −2 Wikipedialuva talk contribs (→2012 onwards: clean up, typo(s) fixed: $32 billion USD → US$32 billion, York based → York-based) Tag: AWB

29 April 2025

• diffhist m Oracle Corporation 21:44 +474 Milana.jav talk contribs Tag: Visual edit
• diffhist Algorithm 16:32 −59 MrOllie talk contribs (Restored revision 1284606175 by Remsense (talk): Broken ref) Tags: Twinkle Undo
• diffhist m Algorithm 16:29 +59 Buggybops talk contribs (added citation about Babylonian Astronomy) Tags: Reverted Visual edit
• diffhist Google 02:30 −39 Mast303 talk contribs Tag: Reverted
• diffhist Wayback Machine 00:22 +9 Cranbery talk contribs (Fixed grammar) Tag: Visual edit