Search found 665 matches

by leonard
Fri Jun 19, 2020 9:59 am
Forum: Demos - General
Topic: STE Blitter
Replies: 19
Views: 1198

Re: STE Blitter

ijor wrote:
Thu Jun 18, 2020 3:09 am
You can read the Blitter source here if you are interested: https://github.com/ijor/stBlitter
Did you really thought I was able to read VHDL? I didn't understand anything to these hardware :( ( but I'd love to )
by leonard
Wed Jun 17, 2020 9:48 pm
Forum: Demos - General
Topic: STE Blitter
Replies: 19
Views: 1198

Re: STE Blitter

Hi Ijor!

Good to see you too! I'm doing fine. What about your FPGA atari core?

And yes you're right, blitter is also more powerfull than CPU to perform shift! blitter shifts are just "free".
by leonard
Wed Jun 17, 2020 7:37 pm
Forum: Demos - General
Topic: STE Blitter
Replies: 19
Views: 1198

Re: STE Blitter

Hi Keops! Almost everything has been said here. let's try to add details if I could - When using the Blitter, is the CPU partially / totally unavailable?' If I use the entire machine time during the frame to blit sprites or copy stuff using the Blitter, will I have any 68000 time left to do anything...
by leonard
Wed Apr 15, 2020 8:28 am
Forum: News & Announcements
Topic: AmigAtari - Oxygene
Replies: 26
Views: 1977

Re: AmigAtari - Oxygene

Hi! Final version available! Amiga lowpass filter turned OFF, and default WinUAE free compatible ROM compatible! Enjoy an even better YM sound full of medium and treble :)

https://www.pouet.net/prod.php?which=85276
by leonard
Tue Apr 14, 2020 10:08 am
Forum: News & Announcements
Topic: AmigAtari - Oxygene
Replies: 26
Views: 1977

Re: AmigAtari - Oxygene

well, I tested the musicdisk on my real Amiga. Certainly, Leonard has forgotten to disable the Amiga's low-pass filter when the musicdisk is executed. Wow I didn't even though about this amiga low pass filter!! :) thanks a lot Estrayk for pointed me that! I will disable that dawn filter in the fina...
by leonard
Thu Feb 20, 2020 8:35 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 59
Views: 30104

Re: LZ4 decoder (assembler)

I did three versions ( really fast, normal, and really small ). Just pickup the right one for your need :)
https://github.com/arnaud-carre/lz4-68k

Btw I'm using as68 as assembler ( an assembler made by Ziggy Stardust & updated by Ben/Ovr )
by leonard
Fri Feb 07, 2020 1:01 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 59
Views: 30104

Re: LZ4 decoder (assembler)

Here are the two parts dealing with little endian values (32 Bit block length and 16 Bit match offset): move.b (a0)+,-(a2) move.b (a0)+,-(a2) move.w (a2)+,d3 Same speed but you don't need to initialize a2 and a2 buffer anymore with a7.b trick: move.b (a0)+,d1 ; read 16bits offset, little endian, un...
by leonard
Thu Nov 07, 2019 4:07 pm
Forum: Demos - General
Topic: state of the art atari SNDH music?
Replies: 37
Views: 13626

Re: state of the art atari SNDH music?

evil wrote:I can't tell which is which.
nice test! I have to admit it's same for me, I can't tell which is which. I'm surprised. I thought it will be more noticeable ( esp about some nasty jittering in the music tempo )
by leonard
Wed Nov 06, 2019 10:00 pm
Forum: Demos - General
Topic: state of the art atari SNDH music?
Replies: 37
Views: 13626

Re: state of the art atari SNDH music?

This is normal as many trackers use three timers for effects (A/B/D) and the remaining timer is C. Timer C is also used by the OS (plus harddisk driver) for it's 200 Hz clock. If you want to play the songs without killing the OS the normal thing is to hook on to the OS 200Hz Timer-C and call the mu...
by leonard
Wed Nov 06, 2019 8:23 pm
Forum: Demos - General
Topic: state of the art atari SNDH music?
Replies: 37
Views: 13626

Re: state of the art atari SNDH music?

I looked a bit at the 0913 music disk protection. That's quite funny actually. The protection is quite smart because it makes ripping hard even using emulator. However it "may" affect sound quality. Some part of the music driver are decoded/encoded real time using trace mode. During these parts, int...
by leonard
Mon Nov 04, 2019 5:31 pm
Forum: Demos - General
Topic: state of the art atari SNDH music?
Replies: 37
Views: 13626

Re: state of the art atari SNDH music?

lotek_style wrote:Leonard: Ultrasyd does not want all of his songs to be SNDH because he is still earning money with them.
Really? he's making money with Atari tunes? how is that possible?
by leonard
Mon Nov 04, 2019 5:30 pm
Forum: Demos - General
Topic: state of the art atari SNDH music?
Replies: 37
Views: 13626

Re: state of the art atari SNDH music?

Gnu wrote:Leonard: Is there a 1mb version of We Were @ with YM music in the works?
:)
I don't think so! ( at least I'm not working on it :) )
by leonard
Sun Nov 03, 2019 10:21 pm
Forum: Demos - General
Topic: state of the art atari SNDH music?
Replies: 37
Views: 13626

Re: state of the art atari SNDH music?

ripping protection? for a musicdisk? that's strange. So it's on purpose? too bad we can't hear these great songs on PC with SNDH
by leonard
Sun Nov 03, 2019 6:32 pm
Forum: Demos - General
Topic: state of the art atari SNDH music?
Replies: 37
Views: 13626

Re: state of the art atari SNDH music?

wietze wrote:there is still a musicdisk left unripped out there! (013!)[/list]
Are you talking about this awesome music disk: https://www.pouet.net/prod.php?which=64496

You mean all these UltraSyd songs doesn't exist in SNDH archive?
by leonard
Sun Nov 03, 2019 12:01 pm
Forum: 680x0
Topic: fastest way to copy a memory block in 68060 assembly
Replies: 18
Views: 6752

Re: fastest way to copy a memory block in 68060 assembly

I didn't know anything about 68060 (except movep does not exist anymore :)). I didn't even know about the "move16" instruction existence. Sounds very nice!
by leonard
Sun Nov 03, 2019 12:00 pm
Forum: Demos - General
Topic: state of the art atari SNDH music?
Replies: 37
Views: 13626

Re: state of the art atari SNDH music?

wow thanks a lot for all these links! hours of listening in perspective!
by leonard
Mon Oct 28, 2019 9:17 pm
Forum: Demos - General
Topic: state of the art atari SNDH music?
Replies: 37
Views: 13626

state of the art atari SNDH music?

Hi! I'm looking for what you think to be the state of the art modern SNDH files. I know all classic old madmax tunes back in the day, but I'm not aware of any recent new music. If any of you could post here his top 10. I'm looking for state of the art atari soundchip music, as if you wanted to impre...
by leonard
Tue Aug 27, 2019 4:01 pm
Forum: Demos - General
Topic: "We Were @" demo question
Replies: 19
Views: 6329

Re: "We Were @" demo question

Cyprian wrote:Would be possible create the STfm version?
I won't try myself for sure :)
by leonard
Mon Aug 26, 2019 9:27 pm
Forum: Demos - General
Topic: "We Were @" demo question
Replies: 19
Views: 6329

Re: "We Were @" demo question

Hi,

You can download a new version supporting both 2MiB and 4MiB version! Just use the same download link in pouet.net page

https://www.pouet.net/prod.php?which=66702

Enjoy!
by leonard
Mon Aug 26, 2019 6:51 pm
Forum: Demos - General
Topic: "We Were @" demo question
Replies: 19
Views: 6329

Re: "We Were @" demo question

Or also, you could put together a 1mb version with an YM rendition of the soundtrack. :D Wow that's a greta idea :) If any musician is able to do that, I could do a 1MiB version one day with chip music! Anyway some of you have 2MiB machine, and I already have 2MiB version on my local disk, so let's...
by leonard
Sun Aug 25, 2019 8:25 pm
Forum: Demos - General
Topic: "We Were @" demo question
Replies: 19
Views: 6329

Re: "We Were @" demo question

troed wrote:Surely anyone with actual interest in using the real hardware has already maxed the SIMMs in their STEs? ST is a whole different ballgame however.
yeah, so maybe even a 2MiB version is useless :(
by leonard
Sun Aug 25, 2019 6:17 pm
Forum: Demos - General
Topic: "We Were @" demo question
Replies: 19
Views: 6329

"We Were @" demo question

Hi! I was about to release a 2MiB version of "We Were @" demo . This version is on my disk for a while. But I had a new idea: I think I can do a 1MiB version, without music. I want to know if I should do it or not. From one side, I think it's bad idea, because the demo without music isn't the real d...
by leonard
Sat Aug 24, 2019 1:38 pm
Forum: Coding
Topic: Timer B + DMA at once
Replies: 17
Views: 4869

Re: Timer B + DMA at once

I confirm the STE DMA sounnd playback does not take any cycle to the CPU or video decoding. The "We Were @" rely on that to display fullscreen effects with sampled music ( the sampled "free" playing sound is one of the great STE feature :) )
by leonard
Sun Feb 10, 2019 5:22 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 59
Views: 30104

Re: LZ4 decoder (assembler)

Apart from the 4k binary Cyprian tried, has anyone done any other tests regarding pack ratio? I'm still favouring ARJ mode 4 and 7 for max pack ratio, but this looks like a great alternative for when depack speed is crucial. Regarding packing ratio, if you're looking for best ratio ever, use shrink...
by leonard
Fri Jan 18, 2019 12:23 pm
Forum: 680x0
Topic: LZ4 decoder (assembler)
Replies: 59
Views: 30104

Re: LZ4 decoder (assembler)

Hi! I was about to post something here about my fast LZ4 decoder, and by searching "LZ4" I find that thread! I did three versions of LZ4 depacker. One of them is quite fast. If anyone is interested: https://github.com/arnaud-carre/lz4-68k ( LZ4 has interesting properties, such as ability to do "in p...

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