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Search: Posts Made By: roondar
Forum: Amiga scene Yesterday, 21:48
Replies: 24
Views: 1,472
Posted By roondar
You are of course correct. Me calling it “free”...

You are of course correct. Me calling it “free” was a bit hyperbolic, I do apologise!

I’ll check it out for sure, I’m very impressed with the result. Thanks for making this :):)
Forum: Coders. Asm / Hardware Yesterday, 18:09
Replies: 44
Views: 1,276
Posted By roondar
No worries, I didn't take it as criticism. It's...

No worries, I didn't take it as criticism. It's more that I've been trying (and both succeeding and failing at the same time :p) to make sure the information in this thread is as accurate as I can...
Forum: Coders. Asm / Hardware Yesterday, 16:50
Replies: 44
Views: 1,276
Posted By roondar
Well, it's kind of complicated. See, what you say...

Well, it's kind of complicated. See, what you say is true (and I did indeed point it out - at least in my article, probably also in this thread somewhere). But what I say is also true :D

Here's...
Forum: Coders. Asm / Hardware Yesterday, 16:13
Replies: 44
Views: 1,276
Posted By roondar
Right, I see what you mean now. The overall blit...

Right, I see what you mean now. The overall blit will be about 8% faster, but the individual planes are faster. Assuming the extra overhead for running several blits rather than one won't get in the...
Forum: support.Other Yesterday, 13:03
Replies: 9
Views: 243
Posted By roondar
I remember trying out MPEG1 decoding of Video...

I remember trying out MPEG1 decoding of Video CD's on my A1200/68030@50MHz. I can't remember how well that went, but it probably didn't run at 25fps...
Forum: Coders. Asm / Hardware Yesterday, 12:56
Replies: 44
Views: 1,276
Posted By roondar
I find it unlikely this method will give a 25%...

I find it unlikely this method will give a 25% speed up. Here's why:

Cookie-cut is three reads and one write per longword output, or 4 accesses in total per longword. Mask is two reads and one...
Forum: Coders. Asm / Hardware Yesterday, 12:12
Replies: 44
Views: 1,276
Posted By roondar
Precisely, bring out yer BOBs! :D

Precisely, bring out yer BOBs! :D
Forum: Nostalgia & memories Yesterday, 11:52
Replies: 36
Views: 801
Posted By roondar
100% sure. I believe there is also a 60Hz...

100% sure. I believe there is also a 60Hz version, but IIRC that uses the Turbo Outrun board instead. The original game runs at 30Hz.
Forum: Coders. Asm / Hardware Yesterday, 11:48
Replies: 44
Views: 1,276
Posted By roondar
I do happen to have those, yes. From memory: ...

I do happen to have those, yes. From memory:

CPU only copy: about 100% of Blitter speed
CPU+Blitter copy (unrolled loop once): about 110% of Blitter speed
CPU only cookie-cut: very slow,...
Forum: Coders. Asm / Hardware Yesterday, 11:40
Replies: 44
Views: 1,276
Posted By roondar
My code also does screen restoring via...

My code also does screen restoring via Blitter/CPU (assuming you mean the restoring of bobs). That part is actually slower than the cookie-cut part. In fact, I checked all options: CPU only copy, CPU...
Forum: Coders. Asm / Hardware Yesterday, 11:16
Replies: 44
Views: 1,276
Posted By roondar
Yes indeed, this effect relies on features of the...

Yes indeed, this effect relies on features of the 68020 (and 32 bit access to chip memory) to work: shifting is only fast enough because of the 68020's barrel shifter. It also relies on running the...
Forum: Nostalgia & memories Yesterday, 11:08
Replies: 36
Views: 801
Posted By roondar
I did point out Outrun earlier :p (which really...

I did point out Outrun earlier :p (which really does run at 30Hz in it's original arcade form)

There's also the Metal Slug games, which were in the Arcades as well. They also run at 30Hz.
Forum: Nostalgia & memories 19 February 2020, 22:58
Replies: 36
Views: 801
Posted By roondar
One of my favourite Amiga shoot em ups (and I...

One of my favourite Amiga shoot em ups (and I know some people will call me crazy as it's both a Euro-shooter and doesn't run at 50Hz) is SWIV. I just love that game and I literally don't care it...
Forum: Coders. Asm / Hardware 19 February 2020, 22:52
Replies: 44
Views: 1,276
Posted By roondar
I'm not aware of PowerBobs. However, it's pretty...

I'm not aware of PowerBobs. However, it's pretty easy to check if it uses the same principle: if it doesn't require an AGA machine or an A3000 then it is very likely that it doesn't use the same...
Forum: Nostalgia & memories 19 February 2020, 22:42
Replies: 36
Views: 801
Posted By roondar
Pretty much the best known example (to me anyway)...

Pretty much the best known example (to me anyway) is the original arcade version of Outrun, which runs at 30FPS.
Forum: Coders. Asm / Hardware 19 February 2020, 18:45
Replies: 44
Views: 1,276
Posted By roondar
That's quite interesting. Normally not all that...

That's quite interesting. Normally not all that important I guess, but the A1200 has quite slow memory and running the Blitter makes it even slower (from the perspective of the CPU), so I guess it...
Forum: Coders. Asm / Hardware 19 February 2020, 18:27
Replies: 44
Views: 1,276
Posted By roondar
It's such a shame too, as they really are a great...

It's such a shame too, as they really are a great way to deal with graphics data like this. The bitfield version of the routine was much simpler. But all shall perish on the altar of performance :D
...
Forum: Coders. Asm / Hardware 19 February 2020, 18:01
Replies: 44
Views: 1,276
Posted By roondar
That reminds me... We had a small discussion over...

That reminds me... We had a small discussion over PM about some of the weirdness I ran into when making this. Might be interesting to share some of it with a wider audience now. I'll add a bonus item...
Forum: Coders. General 19 February 2020, 17:48
Replies: 16
Views: 835
Posted By roondar
Once I have something, I'll be sure to share it....

Once I have something, I'll be sure to share it. But it may be a while yet ;)
Forum: Coders. Asm / Hardware 19 February 2020, 17:39
Replies: 44
Views: 1,276
Posted By roondar
It probably won't surprise you, but I'm a lot...

It probably won't surprise you, but I'm a lot more optimistic. I'm actually rather convinced this method can be useful for far more than very specific cases :)
Forum: OT - General 19 February 2020, 17:19
Replies: 11
Views: 345
Posted By roondar
It is true that once you have it no further...

It is true that once you have it no further logins are required. But I didn't have it on my PC. Thought I did, but that turned out to be incorrect ;)
Forum: OT - General 19 February 2020, 14:55
Replies: 11
Views: 345
Posted By roondar
I did manage to get a download eventually, thanks...

I did manage to get a download eventually, thanks for the links, etc.

That said, I still think it's a bit much that the creators of Java have such policies in place. It's probably an overreaction...
Forum: Coders. Asm / Hardware 19 February 2020, 14:38
Replies: 44
Views: 1,276
Posted By roondar
I'm definitely certain programmers do try to...

I'm definitely certain programmers do try to optimize concurrency :great. I'm even a bit hopeful that this effect might help programmers achieve more of that.

That said, I am completely unaware of...
Forum: Coders. Asm / Hardware 19 February 2020, 11:19
Replies: 44
Views: 1,276
Posted By roondar
Like they say, great (or crazy :p) minds think...

Like they say, great (or crazy :p) minds think alike :D

It's probably worth noting then that the limiting factor for the speed of this effect is purely based on number of the memory reads/writes...
Forum: Retrogaming General Discussion 19 February 2020, 11:01
Replies: 12
Views: 636
Posted By roondar
More C64 games is always a good idea if you ask...

More C64 games is always a good idea if you ask me :great

That said, I'm not quite sure which Amiga platform this is currently aiming for - is this a game for NG Amiga's, or is a version for...
Forum: Coders. Asm / Hardware 19 February 2020, 10:43
Replies: 44
Views: 1,276
Posted By roondar
Your welcome! Got more ideas yet, so there will...

Your welcome!
Got more ideas yet, so there will be more Amiga Tech episodes in the future :D

My personal hypothesis is that the A1200 was seen very differently from the A500. The A500 was a...
Forum: Coders. Asm / Hardware 19 February 2020, 00:14
Replies: 44
Views: 1,276
Posted By roondar
CPU Assisted Blitting example + source

A while ago I had the idea to make the CPU and Blitter work together for blitting bobs on an unexpanded Amiga 1200. The idea being that the 32 bit access to chip memory of the 68020, coupled with the...
Forum: Retrogaming General Discussion 18 February 2020, 23:23
Replies: 40
Views: 1,348
Posted By roondar
It might be interesting to note that Lemon Amiga...

It might be interesting to note that Lemon Amiga scores this game a 7.3 out of 10 based on 228 votes. Which is a good three points more than I'd personally rank it, but does show that there is a...
Forum: Amiga scene 17 February 2020, 12:06
Replies: 233
Views: 21,223
Posted By roondar
I'm rather hoping for the ACA 1240/1260 cards and...

I'm rather hoping for the ACA 1240/1260 cards and the Reloaded to appear one day. I have the C64 reloaded and it's pretty awesome to not have to worry about caps/resistors/power supplies/etc for a...
Forum: Amiga scene 17 February 2020, 11:46
Replies: 24
Views: 1,472
Posted By roondar
Using Dual Playfield mode for one Copper...

Using Dual Playfield mode for one Copper controlled road layer and one graphics layer is a very smart move. Done well, that makes drawing the road pretty much "free". The cost is obviously a low...
Forum: Looking for a game name ? 17 February 2020, 11:43
Replies: 9
Views: 714
Posted By roondar
For some reason, I really rather liked this game...

For some reason, I really rather liked this game back in the day. Didn't know about the PC version though.
Forum: Coders. General 17 February 2020, 11:41
Replies: 16
Views: 835
Posted By roondar
I'm going to be using hamconvert for now (which...

I'm going to be using hamconvert for now (which is a very nice tool, by the way). Writing a proper colour quantisation algorithm for EHB is probably going to take more time than I want to spend on it...
Forum: OT - General 16 February 2020, 01:05
Replies: 11
Views: 345
Posted By roondar
Thanks for the tip. I'll check it out!

Thanks for the tip. I'll check it out!
Forum: Coders. General 16 February 2020, 00:32
Replies: 16
Views: 835
Posted By roondar
Thanks, I'll check it out!

Thanks, I'll check it out!
Forum: OT - General 16 February 2020, 00:31
Replies: 11
Views: 345
Posted By roondar
Thumbs down Wow... Oracle/JRE download

So I decided to download hamconvert as suggested to me elsewhere. Turns out I don't yet have the Java Runtime. No problem, I'll just download it.

Wait... I need an account to download the runtime...
Forum: Nostalgia & memories 15 February 2020, 23:54
Replies: 67
Views: 12,950
Posted By roondar
Actually, you can play Dragon's Lair in...

Actually, you can play Dragon's Lair in hires/interlaced. I forget which key you have to press, but you can switch to that mode in the game.

It does default to lowres though.
Edit: found it....
Forum: Coders. General 15 February 2020, 23:51
Replies: 16
Views: 835
Posted By roondar
Yeah, J is something else. Give me 68000 assembly...

Yeah, J is something else. Give me 68000 assembly any day over that!

I'll be checking out HAMconvert. See if that actually does create 64 colour images when converting to EHB ;)
Forum: Coders. General 15 February 2020, 15:06
Replies: 16
Views: 835
Posted By roondar
Well, I want to convert a whole bunch of pictures...

Well, I want to convert a whole bunch of pictures (on the order of 200-300). I suppose I could use PPaint for it, but I thought it might be simple to just make a small program that does it manually....
Forum: Retrogaming General Discussion 14 February 2020, 18:25
Replies: 44
Views: 2,111
Posted By roondar
Looking at the list you provided and the rest...

Looking at the list you provided and the rest over at hol.abime.net... Castle Kingdoms definitely looks like my kind of game, love the artwork. Screenshots for Nucleus also look rather nice.

I'll...
Forum: Coders. General 14 February 2020, 17:03
Replies: 16
Views: 835
Posted By roondar
Question Converting a given palette to Extra Half-Brite

I've been wondering lately how you'd properly convert colours to an EHB specific palette. For non-EHB I can think of several approaches, but for EHB I'm kind of stumped on how to deal with the...
Showing results 1 to 40 of 1635

 
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