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Search took 0.33 seconds. Search: Posts Made By: ross
Forum: project.Amiga Game Factory Yesterday, 15:04
Replies: 118
Views: 23,884
Posted By ross
Great question.. Well, the code is somewhere...

Great question..

Well, the code is somewhere on my hard drive, so it's possible that sooner or later it will come to light ;)
Forum: Coders. Asm / Hardware Yesterday, 14:59
Replies: 2
Views: 128
Posted By ross
Yes and yes. If you specifically want IRQ6 then...

Yes and yes.
If you specifically want IRQ6 then a CIAB timed event (per scanline also with copper).
Forum: Coders. General 08 April 2021, 18:29
Replies: 22
Views: 971
Posted By ross
Add the unpacker code to it.. :D

Add the unpacker code to it.. :D
Forum: Coders. General 08 April 2021, 18:11
Replies: 22
Views: 971
Posted By ross
PAQ8 is a CM based compressor. Context mixing...

PAQ8 is a CM based compressor.
Context mixing algorithms are based on Bayesian inference, so it usually store the models in memory both at compression and decompression.

From Paq8px command line...
Forum: Coders. General 08 April 2021, 12:39
Replies: 22
Views: 971
Posted By ross
You should expect ZIP Deflate like compression...

You should expect ZIP Deflate like compression from S405
But I leave it to mr.spiv to advertise it :D
Forum: Coders. General 08 April 2021, 09:56
Replies: 22
Views: 971
Posted By ross
Yeah! S405!

Yeah! S405!
Forum: Coders. Releases 05 April 2021, 12:21
Replies: 18
Views: 912
Posted By ross
Your sources and notes are very well done! :cool ...

Your sources and notes are very well done! :cool
I would like to say the same about mine... :rolleyes
Forum: Coders. Releases 04 April 2021, 15:44
Replies: 18
Views: 912
Posted By ross
Nice intro, best in the compo. :great

Nice intro, best in the compo.
:great
Forum: Coders. Asm / Hardware 03 April 2021, 18:40
Replies: 96
Views: 4,823
Posted By ross
Somewhere you have to take a cue :D Better...

Somewhere you have to take a cue :D

Better if I remove the image, I get a headache just looking at it :p
Forum: Coders. Asm / Hardware 03 April 2021, 17:13
Replies: 96
Views: 4,823
Posted By ross
Right. But you need one more register and one...

Right.
But you need one more register and one more instruction ;)



---
The effect is this, just a couple of hundred bytes. Inspired by Alcatrax/Kefrens bars, massive blitter feedback effect...
Forum: Coders. Asm / Hardware 02 April 2021, 18:28
Replies: 96
Views: 4,823
Posted By ross
I'm writing a very tiny intro and I need a...

I'm writing a very tiny intro and I need a circular 256 byte array of unsigned 2 quadrants sine values (to add it to a bitmap pointer).

I ended up with:
;0->$ff->0 circular, len=256...
Forum: Coders. Asm / Hardware 31 March 2021, 09:36
Replies: 1
Views: 271
Posted By ross
Full exe that hung the machine please :)

Full exe that hung the machine please :)
Forum: Coders. Asm / Hardware 30 March 2021, 09:53
Replies: 4
Views: 450
Posted By ross
Unfortunately it is not possible to do this with...

Unfortunately it is not possible to do this with copper on OCS because VHPOSW is among the registers on which copper cannot write (not even by setting the CDANG bit in COPCON).
Usually you can write...
Forum: Coders. Asm / Hardware 29 March 2021, 12:08
Replies: 3
Views: 547
Posted By ross
(x1,y1)(x2,y2) dx=|x1-x2| dy=|y1-y2| \ ...

(x1,y1)(x2,y2)
dx=|x1-x2|
dy=|y1-y2|

\ | /
\6 | 7/
5 \ | / 8
\|/
----X----
/|\
Forum: Nostalgia & memories 24 March 2021, 19:31
Replies: 535
Views: 155,317
Posted By ross
:agree --- There is a code path in...

:agree

---

There is a code path in Denaris that fail on 020+ processor because of an unsuccessful jump to 'misaligned address error vector' that end in:
jmp $fce2

Of course is a (love)...
Forum: Coders. Asm / Hardware 22 March 2021, 17:53
Replies: 44
Views: 2,322
Posted By ross
I LOVE this intro by Antiriad, so Amigaish and...

I LOVE this intro by Antiriad, so Amigaish and nostalgic.
Forum: Coders. Asm / Hardware 22 March 2021, 17:32
Replies: 44
Views: 2,322
Posted By ross
Just check the message I sent you 2 days ago :)

Just check the message I sent you 2 days ago :)
Forum: Coders. Asm / Hardware 21 March 2021, 22:38
Replies: 96
Views: 4,823
Posted By ross
Finally the 2+2 quadrant version. 40 bytes.....

Finally the 2+2 quadrant version.

40 bytes.. 38 byte if table of 1025 sine entries accepted.
Algorithm and precision are the same as the previous one.

The only advantage over a/b one is speed....
Forum: Coders. Asm / Hardware 21 March 2021, 16:20
Replies: 96
Views: 4,823
Posted By ross
46 bytes.. lea SinEntries*2(a0),a1 ...

46 bytes..

lea SinEntries*2(a0),a1
moveq #0,d1
.1 moveq #97,d0
ror.l #7,d0
move.l d1,d2
mulu.w d2,d2
sub.l d2,d0
swap d0
Forum: Coders. Asm / Hardware 21 March 2021, 11:10
Replies: 96
Views: 4,823
Posted By ross
:D:D:D :p That's what made me add that damn beq...

:D:D:D :p
That's what made me add that damn beq in my code.
Forum: Nostalgia & memories 21 March 2021, 10:07
Replies: 535
Views: 155,317
Posted By ross
Reach for the Skies: Hi! My name is Jim.....

Reach for the Skies:

Hi! My name is Jim.. and I am a computer programmer & funny.
My boss seems to disagree on both counts.. I wonder why?
Anyway.. thats enough about me...
What about you? Do...
Forum: Coders. Asm / Hardware 21 March 2021, 09:44
Replies: 96
Views: 4,823
Posted By ross
This one wins hands down. Max...

This one wins hands down.

Max AbsError=0.24%, Max RelError=0.53%, 138174 CPU cycles

Absolutely superb :great
Forum: Coders. Asm / Hardware 21 March 2021, 02:03
Replies: 96
Views: 4,823
Posted By ross
As I guessed: moveq #97,d0 ror.l ...

As I guessed:
moveq #97,d0
ror.l #7,d0

Max AbsError=1.56%, Max RelError=4.50%

:)
Forum: Coders. Asm / Hardware 21 March 2021, 00:12
Replies: 96
Views: 4,823
Posted By ross
Quasi-accurate 1+3 quadrant version. 48...

Quasi-accurate 1+3 quadrant version.

48 bytes.. perhaps me too missed some optimisation here.

lea SinEntries*2(a0),a1
moveq #3,d0
ror.l #2,d0
moveq #0,d1
.l move.l ...
Forum: Coders. Asm / Hardware 20 March 2021, 21:43
Replies: 96
Views: 4,823
Posted By ross
Well, I want these 14 bytes, I would stay to 44...

Well, I want these 14 bytes, I would stay to 44 bytes :D

Yes, the 24-byte version is awesome!
Forum: Coders. Asm / Hardware 20 March 2021, 21:39
Replies: 44
Views: 2,322
Posted By ross
I'm pretty sure I've seen modules with this...

I'm pretty sure I've seen modules with this "instrument without the note" pattern (I remember it because it seemed strange to me :)),
So a tracker/mplayer that supports it must certainly exist.
Forum: Coders. Asm / Hardware 20 March 2021, 21:22
Replies: 96
Views: 4,823
Posted By ross
How many byte you lose from one quadrant to four?...

How many byte you lose from one quadrant to four?
I have a feeling i could improve my code at this, but i can't figure out how.
My code could calculate 2 quadrants in the loop, but in order not to...
Forum: Coders. Asm / Hardware 20 March 2021, 19:51
Replies: 96
Views: 4,823
Posted By ross
46 byte I'll post the code when Dan gives the...

46 byte
I'll post the code when Dan gives the green light to everyone ;)

But just noticed one small thing and I call the referee if he lets me do it.
Since it is the extended version of the 30...
Forum: Coders. Asm / Hardware 20 March 2021, 19:43
Replies: 96
Views: 4,823
Posted By ross
Check this: exp(-((x-4)^2+(y-4)^2)^2/1000) +...

Check this:
exp(-((x-4)^2+(y-4)^2)^2/1000) + exp(-((x+4)^2+(y+4)^2)^2/1000) + 0.1exp(-((x+4)^2+(y+4)^2)^2)+0.1exp(-((x-4)^2+(y- 4)^2)^2)

Well, you can paste it in google.. :D
Forum: Coders. Asm / Hardware 20 March 2021, 19:07
Replies: 96
Views: 4,823
Posted By ross
I usually write this as: movea.w #511+2,a1 It...

I usually write this as: movea.w #511+2,a1
It reminds to me that I am using a constant with a sign extension.
Forum: Coders. Asm / Hardware 20 March 2021, 15:52
Replies: 96
Views: 4,823
Posted By ross
The 'Jobbo' column must be filled with the...

The 'Jobbo' column must be filled with the calculated values :p.
It would be better to have some reference code.
But it can be fine :)
Forum: Coders. Asm / Hardware 20 March 2021, 15:30
Replies: 96
Views: 4,823
Posted By ross
This is the reason when I a call for a common...

This is the reason when I a call for a common reference code for the error :)
Forum: Coders. Asm / Hardware 20 March 2021, 14:11
Replies: 96
Views: 4,823
Posted By ross
Can someone publish a program that calculate the...

Can someone publish a program that calculate the maximum/average error in the generated table?
If it's already done at least we have a common reference :)
Forum: Coders. Asm / Hardware 19 March 2021, 23:50
Replies: 96
Views: 4,823
Posted By ross
Yep :agree But I think that these two...

Yep :agree

But I think that these two alternative approaches based on the Minsky circle algorithm are really excellent competitors!
Forum: Coders. Asm / Hardware 19 March 2021, 22:33
Replies: 65
Views: 3,371
Posted By ross
It's full of junkies in here :D

It's full of junkies in here :D
Forum: Coders. Asm / Hardware 19 March 2021, 22:22
Replies: 96
Views: 4,823
Posted By ross
Mine on an approximated 3rd degree Taylor series..

Mine on an approximated 3rd degree Taylor series..
Forum: Coders. Asm / Hardware 19 March 2021, 22:15
Replies: 44
Views: 2,322
Posted By ross
I see a possible weak point here: writing the...

I see a possible weak point here: writing the pointer is not an atomic operation...

If the period [EDIT: of course I meant..] len counter has finished counting down and the DMA is still active a...
Forum: Coders. Asm / Hardware 19 March 2021, 21:54
Replies: 96
Views: 4,823
Posted By ross
Interesting :cool

Interesting :cool
Forum: Coders. Asm / Hardware 19 March 2021, 21:47
Replies: 96
Views: 4,823
Posted By ross
Perhaps code are based on the same idea? The...

Perhaps code are based on the same idea?
The fact that we used only two multiplying factors (you directly the divisors, me the reciprocals) it makes me think..
Forum: Coders. Asm / Hardware 19 March 2021, 21:40
Replies: 96
Views: 4,823
Posted By ross
Same here, in theory is original code/idea, but...

Same here, in theory is original code/idea, but surely it was also thought by someone else, let alone.
But I challenge anyone to do it in 30 bytes.
Never seen similar in any Amiga intro/demo (hmm,...
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