Timeline for The move to protected mode on x86 [closed]
Current License: CC BY-SA 4.0
23 events
| when toggle format | what | by | license | comment | |
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| Feb 13 at 20:18 | history | edited | user3840170 |
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| Jan 23 at 10:52 | history | left closed in review |
Greenonline peter ferrie Simon Farnsworth |
Original close reason(s) were not resolved | |
| Jan 20 at 12:49 | comment | added | ABM K | I am willing to rewrite the question ofc. The fact that I am not a native speaker has some impact on the quality of the question. I am sorry, but it is what it is | |
| Jan 20 at 10:40 | comment | added | Criticizing Israel not allowed | I voted to reopen this - although the question isn't well written, the answers show that it's enough to be answerable, and well. | |
| Jan 20 at 10:39 | review | Reopen votes | |||
| Jan 23 at 10:52 | |||||
| Jan 11 at 2:21 | history | closed |
Raffzahn user10854 Stephen Kitt scruss user3486184 |
Needs details or clarity | |
| Jan 10 at 23:52 | comment | added | ABM K | And yet, very interesting and serious answers. Let’s say I am grateful for those who are willing to approach a question with positive intentions | |
| S Jan 10 at 23:51 | vote | accept | ABM K | ||
| Jan 10 at 23:51 | |||||
| Jan 10 at 23:51 | vote | accept | ABM K | ||
| S Jan 10 at 23:51 | |||||
| Jan 10 at 23:08 | answer | added | rcgldr | timeline score: 3 | |
| Jan 10 at 20:34 | history | became hot network question | |||
| Jan 10 at 18:44 | answer | added | Peter Green | timeline score: 6 | |
| Jan 10 at 18:08 | answer | added | supercat | timeline score: 6 | |
| Jan 10 at 14:40 | review | Close votes | |||
| Jan 11 at 2:21 | |||||
| Jan 10 at 14:26 | comment | added | Raffzahn | I do not believe this question can produce any serious answer. It neither defines what that 'step' asked for should be nor gives any source for the vague assumptions made. Any answer will be of speculation founded on interpretation of its unlclear defined content. | |
| Jan 10 at 14:21 | comment | added | Raffzahn | @lvd Don't tell that to hundreds of thousands of 286 running some Unix/Xenix variation. Protected mode was the main reason to use the 286, as real mode performance was achieved at lower cost by using 8086 or 186 CPUs. | |
| Jan 10 at 14:07 | answer | added | JeremyP | timeline score: 16 | |
| Jan 10 at 13:56 | comment | added | Justme | @lvd Not popular and not suitable in which context? IBM compatible PCs, or any use of 286 CPUs in non-IBM compatible computers and embedded systems? | |
| Jan 10 at 13:34 | comment | added | lvd | It seems that the 'protected' mode as offered in 286 -- was never truly popular because of its awkwardness and being not suitable for real world usage. The only move happened when 386 offered a paged virtual memory mode, as it was for a long time in 'big' computers. Even after that, the then pc os monopolist, microsoft, was sabotaging the move to the OSes using that paged mode for ~ another decade. | |
| Jan 10 at 13:31 | comment | added | paxdiablo | The programmer still has full access to the CPU unless they allow an operating system to take that power from them. That's actually how the operating system takes that power away, because it controls it. | |
| Jan 10 at 13:00 | comment | added | Justme | Step to whom? To average home users with IBM compatible PCs running home OSes such as MS-DOS/Windows, or to some other users that do not use IBM compatible PCs, but servers or workstations running Unix-alike or other OSes? | |
| Jan 10 at 12:57 | comment | added | dave | You seem to be mixing two concepts - virtual addressing, in which the memory addresses seen by a program differ from physical memory addresses (which just requires a MMU), and virtual memory, in which the memory space as seen by a program is not always resident in physical memory (generally, a paged or segmented system). I would not characterize either of these as not 'having direct memory access'. Can you clarify what you're really asking? Is it simply when did systems start using protected mode? Surely as soon as it was available - the benefits are obvious. | |
| Jan 10 at 12:31 | history | asked | ABM K | CC BY-SA 4.0 |