Difference between revisions of "Talk:83Plus:OS:TIOS Alternatives"
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Toksyuryel (Talk | contribs) (Thoughts on OS viability) |
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::Yeah, but providing a file system and memory management is beyond exokernel. Plus it doesn't seem to grant access to and revoke hardware resources. I would say it's more microkernelish than exokernelish, although probably provides more OS support than even a microkernel. --[[User:Dan Englender|Dan Englender]] 13:29, 27 March 2006 (PST) | ::Yeah, but providing a file system and memory management is beyond exokernel. Plus it doesn't seem to grant access to and revoke hardware resources. I would say it's more microkernelish than exokernelish, although probably provides more OS support than even a microkernel. --[[User:Dan Englender|Dan Englender]] 13:29, 27 March 2006 (PST) | ||
:I based my text there on the comment left on the Vera wiki [http://brazucs.unitedti.org/vera/wiki/index.php/Talk:Core_Design_Principle discussion page] about their supposed "Core Design Principle". I'm not sure the traditional OS categories work very well for TI-83+ calculators in the first place. I have no particular attachment to that categorization, at any rate, so remove or alter it if you think it's inaccurate. --[[User:Premchai21|Premchai21]] 19:12, 27 March 2006 (PST) | :I based my text there on the comment left on the Vera wiki [http://brazucs.unitedti.org/vera/wiki/index.php/Talk:Core_Design_Principle discussion page] about their supposed "Core Design Principle". I'm not sure the traditional OS categories work very well for TI-83+ calculators in the first place. I have no particular attachment to that categorization, at any rate, so remove or alter it if you think it's inaccurate. --[[User:Premchai21|Premchai21]] 19:12, 27 March 2006 (PST) | ||
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| + | == Thoughts on OS viability == | ||
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| + | Well, I've been thinking myself about creating an OS for the calc. I've been discussing it with friends who are more "in the know" than I as well. In this time, I have come to realize the limitations of the z80 processor. It is now my firm belief that replacing the TI-OS simply isn't viable or worth it. | ||
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| + | The z80 processor does NOT have a protected mode. *ANY* piece of software running on it has direct control over the hardware. There is absolutely NO workaround for this. A malicious piece of software, or just a severely glitchy piece of software, could completely fubar the calc and there isn't a damn thing you can do about it. [[User:Toksyuryel|Toksyuryel]] 12:53, 10 July 2006 (PDT) | ||
Revision as of 11:53, 10 July 2006
Nostalgy
Well, I was on the team for that, and as far as I knew it died. I've not touched my parts of the code for about two years now. I'd be willing to take it back up if it's going to go anywhere, but... I just haven't touched it in so long I'd probably want to start over, especially since I've learned some things since I started working on it. Andy Janata 10:31, 27 March 2006 (PST)
Vera = exokernel?
In regards to Vera: this architecture is very similar to that of an exokernel operating system. Having briefly read up on Vera, it doesn't seem to me to be an exokernel. Even in its current form the operating system seems to do more than securely export hardware resources. However, I'm not intimately familiar with the project, so I'm leaving some time for someone to correct me before I change the text. --Dan Englender 12:25, 27 March 2006 (PST)
- Vera seems to have died in her cradle... Anyway, the idea is to provide a filesystem (possibly integrated with memory management), a plugin system that would enable user code to extend the assembly interface, user program execution (naturally) and maybe a common link protocol and a customisable ISR at $0038. Everything above that, including the UI and maths capabilities is not an integral part of the system. CoBB 13:09, 27 March 2006 (PST)
- Yeah, but providing a file system and memory management is beyond exokernel. Plus it doesn't seem to grant access to and revoke hardware resources. I would say it's more microkernelish than exokernelish, although probably provides more OS support than even a microkernel. --Dan Englender 13:29, 27 March 2006 (PST)
- I based my text there on the comment left on the Vera wiki discussion page about their supposed "Core Design Principle". I'm not sure the traditional OS categories work very well for TI-83+ calculators in the first place. I have no particular attachment to that categorization, at any rate, so remove or alter it if you think it's inaccurate. --Premchai21 19:12, 27 March 2006 (PST)
Thoughts on OS viability
Well, I've been thinking myself about creating an OS for the calc. I've been discussing it with friends who are more "in the know" than I as well. In this time, I have come to realize the limitations of the z80 processor. It is now my firm belief that replacing the TI-OS simply isn't viable or worth it.
The z80 processor does NOT have a protected mode. *ANY* piece of software running on it has direct control over the hardware. There is absolutely NO workaround for this. A malicious piece of software, or just a severely glitchy piece of software, could completely fubar the calc and there isn't a damn thing you can do about it. Toksyuryel 12:53, 10 July 2006 (PDT)
