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Offline matthias1992

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Re: KnightOS
« Reply #540 on: November 17, 2010, 06:41:51 am »
Quote from: SirCmpwn on November 15, 2010, 05:27:05 pm
I'm not using a register, although refresh is a good idea.
So, an entirely different subject. How do you manage multi-threading? I really have been wrecking my brain over it...I assume you use time-division multiplexing? But then again where do you leave/store all the 'shadow' Program Counters?

Also, how many threads will KOS support eventually or is it basically unlimited (despite significant slowdown)

You really should also include BSOD's hehe, any calc user will go nuts on seeing their screen turn dark blue! j/k :P
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Offline Deep Toaster

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Re: KnightOS
« Reply #541 on: November 17, 2010, 10:41:02 am »
Hmm, is there a way to detect if a BSoD byte is sent? If it is, maybe KOS could cancel it as soon as it's detected...
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Offline willrandship

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Re: KnightOS
« Reply #542 on: November 17, 2010, 10:45:21 am »
I think he said 20 threads max.

An error OE exception has occurred.
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Offline jnesselr

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Re: KnightOS
« Reply #543 on: November 17, 2010, 10:28:23 pm »
Quote from: Deep Thought on November 17, 2010, 10:41:02 am
Hmm, is there a way to detect if a BSoD byte is sent? If it is, maybe KOS could cancel it as soon as it's detected...
Not really.  BSOD occurs when the screen is put into test mode.  This would require knowing what bytes were written to the port, which, IIRC, isn't possible.  I think that it could correct it, but it would wast time and space.
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SirCmpwn

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Re: KnightOS
« Reply #544 on: November 18, 2010, 08:25:02 pm »
*BLOD
I also have crash alerts, where it will apologize to the user for crashing and try to recover the previous state.

Quote from: matthias1992 on November 17, 2010, 06:41:51 am
So, an entirely different subject. How do you manage multi-threading? I really have been wrecking my brain over it...I assume you use time-division multiplexing? But then again where do you leave/store all the 'shadow' Program Counters?

Also, how many threads will KOS support eventually or is it basically unlimited (despite significant slowdown)
20 threads max.  As for multithreading, I use interrupts to switch threads, and push all the registers to the stack during the interrupt.  Then, I change the value of SP to point to a different thread's stack, pop all the registers, and RET.  That's the small and simple explanation.
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Offline jnesselr

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Re: KnightOS
« Reply #545 on: November 18, 2010, 09:57:31 pm »
Quote from: SirCmpwn on November 18, 2010, 08:25:02 pm
I also have crash alerts, where it will apologize to the user for crashing and try to recover the previous state.
*jaw drops*  Awesome!!!  "Sorry, your calculator just crashed.  Trying to recover..." That would be nice.  Does it ask to recover?  How does it recover?
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Offline DJ Omnimaga

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Re: KnightOS
« Reply #546 on: November 18, 2010, 11:28:52 pm »
Quote from: SirCmpwn on November 18, 2010, 08:25:02 pm
*BLOD
BSOD on the 83+SE. Instead of a few blue lines, the entire screen turns blue in test mode. :P

Crash alerts and the like sounds cool, but please make sure we can get out of any crash, unlike the TI-Nspire. I hated having to clear the entire memory to get out of one. On  the 89 Titanium I often had this happen too (Line 1111 emulation or something) and I always had to spend 10 minutes trying to find the key combination to get out of the crash everytime...
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SirCmpwn

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Re: KnightOS
« Reply #547 on: November 19, 2010, 04:59:53 pm »
Quote from: graphmastur on November 18, 2010, 09:57:31 pm
*jaw drops*  Awesome!!!  "Sorry, your calculator just crashed.  Trying to recover..." That would be nice.  Does it ask to recover?  How does it recover?
It looks at a sort of checksum of RAM to make sure it isn't corrupted, and sets a flag that says a restore was attempted, so it won't try it if it crashes again.  It unloads the currently executing thread, which is probably the source of the crash.  Then, it just restores the calculator to an executing state, where everything is already loaded in RAM.
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Offline squidgetx

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Re: KnightOS
« Reply #548 on: November 20, 2010, 05:03:43 pm »
Woah, nice work :)
Quote from: DJ Omnimaga on November 18, 2010, 11:28:52 pm
BSOD on the 83+SE. Instead of a few blue lines, the entire screen turns blue in test mode. :P
On my 84+SE the whole screen turns blue as well :P
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Offline matthias1992

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Re: KnightOS
« Reply #549 on: November 20, 2010, 06:16:00 pm »
'bout the bsod i wasn't really being serious but anyway, great work so far Sir! that's one respect for you (in lack of 1337 peanuts which are so extremely rare that there basically are none)

edit:
Quote from: SirCmpwn on November 18, 2010, 08:25:02 pm
*BLOD
I also have crash alerts, where it will apologize to the user for crashing and try to recover the previous state.

Quote from: matthias1992 on November 17, 2010, 06:41:51 am
So, an entirely different subject. How do you manage multi-threading? I really have been wrecking my brain over it...I assume you use time-division multiplexing? But then again where do you leave/store all the 'shadow' Program Counters?

Also, how many threads will KOS support eventually or is it basically unlimited (despite significant slowdown)
20 threads max.  As for multithreading, I use interrupts to switch threads, and push all the registers to the stack during the interrupt.  Then, I change the value of SP to point to a different thread's stack, pop all the registers, and RET.  That's the small and simple explanation.
Brings up another question. Can a program consume more then one thread? or will threads only be initiaded when a other task comes in?
« Last Edit: November 20, 2010, 06:18:21 pm by matthias1992 »
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SirCmpwn

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Re: KnightOS
« Reply #550 on: November 20, 2010, 07:51:10 pm »
Quote from: matthias1992 on November 20, 2010, 06:16:00 pm
Brings up another question. Can a program consume more then one thread? or will threads only be initiaded when a other task comes in?
Programs can be multithreaded, yes.  StartThread takes a pointer in HL to some code to execute on a new thread.
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Offline matthias1992

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Re: KnightOS
« Reply #551 on: November 21, 2010, 08:45:31 am »
awesome!
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Re: KnightOS
« Reply #552 on: November 27, 2010, 06:28:09 am »
Update
I just created the official KnightOS website at http://knightos.sourceforge.net, where you will eventually be able to find downloads, source code, documentation, and developer information for KnightOS.  Please let me know if you find anything wrong with it.
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Offline kindermoumoute

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Re: KnightOS
« Reply #553 on: November 27, 2010, 06:29:53 am »
Pretty, I will see your website.
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Offline Munchor

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Re: KnightOS
« Reply #554 on: November 27, 2010, 07:14:08 am »
There's a website, it looks quite cool, I'm gonna make my own SourceForge project too (Formulum). It looks better than Google Code:

www.code.google.com/p/formulum
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