[XCSSA] Propeller Demo at Breakpoint...

[X-otic Computer Systems of San Antonio]

You should check out some of the 64k and 4k Intro competitions.

http://scene.org/awards.php



On Apr 16, 2009, at 11:06 AM, X-otic Computer Systems of San Antonio  
wrote:

> X-otic Computer Systems of San Antonio wrote:
>> Wow.. really takes me back to the C=64 demo days of old... right  
>> down to the
>> polyphonic waveform sound and rotating cubes and Mandelbrots! hehe..
>>
>> Pretty impressive!  And in just 32k?!
>>
> I guess he does use some kind of compression, but still very  
> impressive.
>> But thinking about it..  the C64 was just ONE 1MHz proc doing all  
>> this fancy
>> video and the Prop runs at what.. 80MHz x 8 cogs = 160MIPS?!
>> 	http://xcssa.org/files/2008-08_Propeller_Presentation_Fredrik.pdf
>> That's 160 times more powerful than my Amiga 500!  Although to put  
>> it in
>> perspective, the C=64 (and Amiga) DID have their own separate  
>> dedicated video
>> generation hardware and circuitry, and the Propeller does it ALL on  
>> board (at
>> VGA resolution no less).  So I guess my reply is more a "prop to  
>> the prop
>> designers" than to the old C=64 hacks. :)
>>
> Yes, it's hard to compare C64 and Amiga to the prop...
> And keep in mind that even the C64 have more memory than the  
> prop... ;-)
>
>> Although.. I didn't realize that the propeller didn't have a simple
>> multiplication instruction.  How do you deal with the Fredrik (and  
>> don't just
>> say multiple additions! ;)
>>
> Actually yes... ;-)
> However there is a shift involved so the worst case have as many add  
> as
> there are bits in the  number so to say.
>
> This is how the multiplication actually looks likes,
>
>                mov   r,#0
> loop
>                shr   y,#1   wc
>        if_c    add   r,x
>                shl   x,#1
>                tjnz  y,#loop
>
>
> There are also log and anti-log tables in the Propeller ROM that can  
> be
> used.
> Convert the two numbers to their log, add and then do an anti-log.
> This has been suggested on the Propeller Forums, I don't know if  
> anyone
> is using it though...
>
> /Fredrik
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