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by npomarede
Sat Oct 12, 2019 10:30 am
Forum: Hatari
Topic: Hatari 2.2.1 has been released
Replies: 42
Views: 8666

Re: Hatari 2.2.1 has been released

That's the kind of effect not supported in mono for now : emulation doesn't support cycle exact color change, neither color change between black/white while the line is displayed.
So, changes to ff8240 are ignored during display and you get the result in Hatari where some parts are missing.
by npomarede
Sat Oct 12, 2019 10:09 am
Forum: Hatari
Topic: Hatari 2.2.1 has been released
Replies: 42
Views: 8666

Re: Hatari 2.2.1 has been released

Hi, just wanted to signal that there was couple of issues in Monochrom mode. If you compare https://youtu.be/RlpP7JVImGA?t=78 (real hardware) and https://youtu.be/ahjYceQGjKM?t=61 (Hatari 2.2.1) there are a number of issues: - The vertical scroll in the main part is not visible: This is achieves by...
by npomarede
Mon Sep 16, 2019 9:01 pm
Forum: Ym rockin'
Topic: looking for Bangkok Knights sndh-file
Replies: 3
Views: 574

Re: looking for Bangkok Knights sndh-file

Note that this music first appeared in an old 1988 Hofa cracktro (for example the one for "Vixen"), using an older replay code from Mad Max : https://demozoo.org/productions/70754/ Hofa later became "The Replicants" (and I remember listening to this music for hours with the volum...
by npomarede
Tue Aug 20, 2019 9:02 pm
Forum: Demos - General
Topic: -Closure- tricks
Replies: 7
Views: 11468

Re: -Closure- tricks

Hi,
Troed posted the source code for his boot sector that does wakestate + ste detection, you should have more details there.
See https://github.com/troed/WSDETECT

Nicolas
by npomarede
Thu Aug 15, 2019 12:34 pm
Forum: Coding
Topic: ST Chipset decap
Replies: 144
Views: 57236

Re: ST Chipset decap

I don't think it's about GLUE-MMU wake states, it depends on the Shifter wakeup. You're right, more tests might be needed to check it was not a coincidence with WS3. BTW, IIRC you sent me some times ago a small program to "display" shitfer wake up state, by mixing low res and med res vert...
by npomarede
Wed Aug 14, 2019 7:18 pm
Forum: Coding
Topic: ST Chipset decap
Replies: 144
Views: 57236

Re: ST Chipset decap

Ah, I remember now about this demo. This demo depends on the Shifter wake up. It is not exactly a stabilization issue. But depending on the Shifter wakeup state you might get the every the "every 16 pixel background" effect. Probably also depends on the exact Shifter version as well. Yes,...
by npomarede
Wed Jul 31, 2019 9:04 am
Forum: Coding
Topic: ST Chipset decap
Replies: 144
Views: 57236

Re: ST Chipset decap

Yes, they used a NOP between 2 move #xx to remove the left border : cpu video_cyc= 32760 504@ 63 : 00000726 12bc 0002 MOVE.B #$02,(A1) IO write.b $ff8260 = $02 pc=726 shifter=0x02 video_cyc_w=32768 line_cyc_w=0 @ nHBL=63/video_hbl_w=64 pc=726 instr_cyc=12 detect remove left cpu video_cyc= 32772 4@ 6...
by npomarede
Wed Jul 31, 2019 8:50 am
Forum: Coding
Topic: ST Chipset decap
Replies: 144
Views: 57236

Re: ST Chipset decap

AFAIK the Death of the left border was one of the first demos which opened the horizontal border, so the concept of stabilization probably wasn't known. I can accept this demo might or might not work (but actually made it work now). However this reload after 4 load thing causes an interesting issue...
by npomarede
Thu Jul 25, 2019 8:36 pm
Forum: Coding
Topic: ST Chipset decap
Replies: 144
Views: 57236

Re: ST Chipset decap

Ah OK, you're talking about the STE shifter. but in that case AFAIR the death of the left border doesn't work on STE.
by npomarede
Thu Jul 25, 2019 7:43 pm
Forum: Coding
Topic: ST Chipset decap
Replies: 144
Views: 57236

Re: ST Chipset decap

Hi
I don't know if you took this into account, but this demo depends on the so called "wake up state", so it won't always work (on my STF, it works in WS1, WS2 and WS4 but not WS3)
Nicolas
by npomarede
Thu Jul 25, 2019 1:40 pm
Forum: 680x0
Topic: How to prefill 030 instruction cache?
Replies: 8
Views: 1006

Re: How to prefill 030 instruction cache?

It could work too, but it would be a little more difficult to set, as you need to write a custom MMU table with corresponding page size to make cacheable only the page that contains the interrupt code. Note that in all cases the interrupt code will need to be aligned on some special memory boudaries...
by npomarede
Thu Jul 25, 2019 1:17 pm
Forum: 680x0
Topic: How to prefill 030 instruction cache?
Replies: 8
Views: 1006

Re: How to prefill 030 instruction cache?

Hi yes, maybe something like this could work (which seems to be what you plan to do) : move.l #inter_prefetch,$xxx.l ;trigger the interrupt move.l #inter_normal,$xxx.l [...] inter_prefetch flush cache with CACR + enable instruction cache [... your code to be cached ... ] freeze cache with CACR rte i...
by npomarede
Thu Jul 18, 2019 8:25 pm
Forum: Coding
Topic: Keyboard controller
Replies: 64
Views: 32032

Re: Keyboard controller

Hi this ROM is a "F1" version as we already know it, not the rare "F0" one. You can see this at offset $DA with this instruction (I disassembled it some time ago to mimic its behaviour into Hatari) : F0DA : 86 F1 " " ldaa #$F1 ; A = $F1 F0DC : 97 13 " " staa X...
by npomarede
Tue Jul 09, 2019 2:32 pm
Forum: Demos - General
Topic: MOTUS by SMFX - a new demo for Atari ST
Replies: 16
Views: 2721

Re: MOTUS by SMFX - a new demo for Atari ST

fiveofive wrote:Very good, and thank you very much! Hatari was in heavy use when doing that one!

Hi, seems your website http://www.fiveofive-music.com/ is not registered anymore ? (when clicking on it in the signature of your message)
by npomarede
Tue Jul 09, 2019 11:59 am
Forum: Demos - General
Topic: MOTUS by SMFX - a new demo for Atari ST
Replies: 16
Views: 2721

Re: MOTUS by SMFX - a new demo for Atari ST

We are happy to announce that our new demo called MOTUS for the ST was released today. Get it here: https://www.pouet.net/prod.php?which=81777 Watch it here: https://www.youtube.com/watch?v=utoYUciy9M0 Feedback is always welcome! My only feedback will be that this demo is very very good :D Not much...
by npomarede
Tue Jun 18, 2019 2:40 pm
Forum: Other emulators & tools
Topic: Rastari
Replies: 4
Views: 1617

Re: Rastari

Interesting. Looks like a well-designed front-end for Hatari. But the project page is really shy about mentionning Hatari :( As it's a frontend and doesn't include Hatari sources, it's of course OK to do so. It would seem nicer to me if Rastari stated that the underlying emulator is Hatari (appart ...
by npomarede
Sun Jun 09, 2019 6:53 pm
Forum: Hatari
Topic: Spectrum 512, Ooze & 60 Hz
Replies: 1
Views: 822

Re: Spectrum 512, Ooze & 60 Hz

Hi
looking at the screenshot, maybe you did not set cpu emulation to "cycle exact" mode ?
Nicolas
by npomarede
Sun Jun 09, 2019 6:43 pm
Forum: Non Atari Platforms
Topic: A new Famicom / NES chiptune album from me
Replies: 2
Views: 3464

Re: A new Famicom / NES chiptune album from me

Great work !!
Now that you teased us, you need to compose new tunes for ST/STE :)

Nicolas
by npomarede
Sun Apr 28, 2019 3:59 pm
Forum: Hatari
Topic: STe/Falcon adjustable DMA sound volume
Replies: 3
Views: 1445

Re: STe/Falcon adjustable DMA sound volume

Hi so far, Hatari volume mixing is not configurable, it's hardcoded to these specific values, which are not too far from real STE, but not close enough. Some measures would need to be done on real STE machine to record YM wave and DMA sound playing square wave then comparing their respective amplitu...
by npomarede
Sat Apr 13, 2019 11:05 am
Forum: Hatari
Topic: Hatari 2.2.1 has been released
Replies: 42
Views: 8666

Re: Hatari 2.2.1 has been released

I checked again and it seems IPF was not enabled by mistake when building Windows version of Hatari 2.2.1. But if you use 2.2.0 version hatari-2.2.0_windows64.zip it will work, I just loaded an IPF to be sure. Af for libretro/retroarch, we don't maintain these ourselves, you should turn to the devel...
by npomarede
Fri Apr 12, 2019 5:02 pm
Forum: Hatari
Topic: Hatari 2.2.1 has been released
Replies: 42
Views: 8666

Re: Hatari 2.2.1 has been released

Hi
the windows version from https://download.tuxfamily.org/hatari/ are compiled with IPF support ; I think the OSX version too, but I'm not sure.
It depends on the OS you use to know which libraries were used to compile Hatari, easiest solution remains to try to load an IPF file.
by npomarede
Fri Apr 05, 2019 9:21 am
Forum: Hatari
Topic: Hatari 2.2.1 has been released
Replies: 42
Views: 8666

Re: Hatari 2.2.1 has been released

Hi and thank you so much for keeping the ST alive ! I've a question related to Hatari 2.2.x : I wondered if it could be possible to convert 2.0.x memory snapshots to 2.2.x format ? Cheers Hi No, it's not possible. It's planned for a future release that memory snapshot will be compatible between new...
by npomarede
Thu Mar 28, 2019 9:48 pm
Forum: Hatari
Topic: High density .STX / pastis support
Replies: 38
Views: 5525

Re: High density .STX / pastis support

Hi I improved Hatari to better handle the DD/HD density for ST/MSA and STX floppy images. - In MegaSTE mode, upper byte of register FF9200 (DIP switches on motherboard) is now emulated too (it was only emulated for TT and Falcon). This register will return amongst other things the model of drive in ...
by npomarede
Mon Feb 18, 2019 4:05 pm
Forum: 680x0
Topic: Where can I find a CRC32 68000 code?
Replies: 26
Views: 8955

Re: Where can I find a CRC32 68000 code?

Hi $EDB88320 is the so called "reversed" crc32, in the sense that it uses the same polynomial $04C11DB7, except you don't shift bits to the left, but to the right (which can be more efficient depending on the cpu little/big endianess) See for example : https://www.hackersdelight.org/hdcode...
by npomarede
Fri Feb 15, 2019 6:26 pm
Forum: Hatari
Topic: High density .STX / pastis support
Replies: 38
Views: 5525

Re: High density .STX / pastis support

Hi, I havent't checked the code, but maybe emutos tries to read in HD then in DD (if HD fails), whatever the value of the cookie is ? And in that case this would allow this STX floppy to work. In all cases, I will add support for ff860e lowest 2 bits, so this should make emulated TOS works similar t...

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