Anyone up for an ASM coding competition? - Page 2

Knocker · 16 April 2016, 07:56

I remember a Swedish magazine had a competition on who could write the shortest Snake ("masken") game in C64 BASIC. Winning entry was like 100 bytes, and it was totally incomprehensible (to me). Wouldn't be very useful but maybe something to try?

litwr · 16 April 2016, 14:33

Somebody may try to get the better results for Amiga in a mathematical demo - http://litwr2.atspace.eu/pi/pi-spigot-benchmark.html

Thorham · 21 April 2016, 22:26

Quote:

Originally Posted by litwr

Somebody may try to get the better results for Amiga in a mathematical demo - http://litwr2.atspace.eu/pi/pi-spigot-benchmark.html

Looks easy enough.

demolition · 21 April 2016, 22:31

Looks like the Vampire 2 should have a (top)place in that list.

litwr · 23 April 2016, 06:50

How to get the maximum speed with A500 (A1200)? For example, c64 is 5% faster in the screen off mode...

DanScott · 23 April 2016, 09:08

Quote:

Originally Posted by litwr

How to get the maximum speed with A500 (A1200)?

Turn off all interrupts and DMA

litwr · 23 April 2016, 10:59

Quote:

Originally Posted by DanScott

Turn off all interrupts and DMA

I use the raster interrupts to measure time ---the ToD of A500 has problem with MSB.

How to disable DMA?

meynaf · 23 April 2016, 11:38

Quote:

Originally Posted by litwr

How to disable DMA?

By doing something like this :

Code:

 move.w #$7fff,$dff096

But i don't recommend it to gain cpu cycles - might give deceiving results (= no gain at all).

Blueberry · 25 April 2016, 12:53

Yay, a competition! Competitions are fun.

Regarding the interrupt/DMA issue: Usually such a competition comes with a testing harness that measures the speed of the solution and tests its correctness. If relevant, this code would turn off interrupts and DMAs to provide a well-defined test metric.

Thorham · 29 April 2016, 21:14

So, what's to be programmed, then?

meynaf · 29 April 2016, 21:41

Quote:

Originally Posted by Thorham

So, what's to be programmed, then?

1080p h.264 realtime decode on unexpanded A500

demoniac · 30 April 2016, 07:33

Quote:

Originally Posted by meynaf

1080p h.264 realtime decode on unexpanded A500

Thorham · 30 April 2016, 15:04

Quote:

Originally Posted by meynaf

1080p h.264 realtime decode on unexpanded A500

Anyway, in all seriousness, what's it going to be?

meynaf · 30 April 2016, 15:25

Quote:

Originally Posted by Thorham

Anyway, in all seriousness, what's it going to be?

I'd vote for something that's useful (i.e. not just a demo) and hasn't been done a thousand times (i'm tired of these c2p contests).
Perhaps taking some C code which takes too much time and optimise that in ASM to make it more usable.

kamelito · 30 April 2016, 15:51

I don't see anything more interesting and useful to do than a 2D general purpose game engine.
Kamelito

DanScott · 30 April 2016, 17:21

Quote:

Originally Posted by kamelito

I don't see anything more interesting and useful to do than a 2D general purpose game engine.
Kamelito

Too complicated for a small quick competition.

I think Meynaf's idea is good

It has to be some short and simple "routine", that lends itself to be coded, optimised, improved, and easily "judge-able"

Thorham · 30 April 2016, 21:20

Quote:

Originally Posted by meynaf

I'd vote for something that's useful

High precision floating point routines are interesting.

NorthWay · 01 May 2016, 01:07

Smallest or fastest decompressor of a given LZ-like compressor?

Thorham · 01 May 2016, 04:37

Quote:

Originally Posted by NorthWay

Smallest or fastest decompressor of a given LZ-like compressor?

Perhaps something custom, like LZ variant + arithmetic coding. Both compressor and de-compressor.

Quote:

Originally Posted by meynaf

i'm tired of these c2p contests

Yes, but how about a very small c2p that's fast? Some small code that generates full c2p code?

alpine9000 · 01 May 2016, 05:26

We could start with something far less ambitious while we see if the concept of a coding competition here works.

That way if this concept falls flat people don't waste heaps of time on something that didn't pan out.

If it works out with something simple, we can run through lots of those good ideas.

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16 April 2016, 07:56	#21
Knocker Registered User Join Date: Jan 2016 Location: Santa Cruz/US Posts: 48	I remember a Swedish magazine had a competition on who could write the shortest Snake ("masken") game in C64 BASIC. Winning entry was like 100 bytes, and it was totally incomprehensible (to me). Wouldn't be very useful but maybe something to try?

16 April 2016, 14:33	#22
litwr Registered User Join Date: Mar 2016 Location: Ozherele Posts: 229	Somebody may try to get the better results for Amiga in a mathematical demo - http://litwr2.atspace.eu/pi/pi-spigot-benchmark.html

21 April 2016, 22:31	#24
demolition Unregistered User Join Date: Sep 2012 Location: Copenhagen / DK Age: 43 Posts: 4,190	Looks like the Vampire 2 should have a (top)place in that list.

23 April 2016, 06:50	#25
litwr Registered User Join Date: Mar 2016 Location: Ozherele Posts: 229	How to get the maximum speed with A500 (A1200)? For example, c64 is 5% faster in the screen off mode...

25 April 2016, 12:53	#29
Blueberry Registered User Join Date: Dec 2007 Location: Aarhus / Denmark Posts: 40	Yay, a competition! Competitions are fun. Regarding the interrupt/DMA issue: Usually such a competition comes with a testing harness that measures the speed of the solution and tests its correctness. If relevant, this code would turn off interrupts and DMAs to provide a well-defined test metric.

29 April 2016, 21:14	#30
Thorham Computer Nerd Join Date: Sep 2007 Location: Rotterdam/Netherlands Age: 47 Posts: 3,796	So, what's to be programmed, then?

30 April 2016, 15:51	#35
kamelito Zone Friend Join Date: May 2006 Location: France Posts: 1,803	I don't see anything more interesting and useful to do than a 2D general purpose game engine. Kamelito

01 May 2016, 01:07	#38
NorthWay Registered User Join Date: May 2013 Location: Grimstad / Norway Posts: 848	Smallest or fastest decompressor of a given LZ-like compressor?

01 May 2016, 05:26	#40
alpine9000 Registered User Join Date: Mar 2016 Location: Australia Posts: 881	We could start with something far less ambitious while we see if the concept of a coding competition here works. That way if this concept falls flat people don't waste heaps of time on something that didn't pan out. If it works out with something simple, we can run through lots of those good ideas.

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