Search found 2018 matches

by Steven Seagal
Thu Nov 30, 2017 3:39 pm
Forum: Hardware
Topic: How I found some original Atari ST ASIC designs
Replies: 79
Views: 11784

Re: How I found some original Atari ST ASIC designs

The output of a flip flop changes at the active clock edge. Assuming the input changes at the same clock and edge (it doesn't have to), yes, the output follows one cycle later. I was thinking about the DPR ref. PT030 in Sheet 29 that gets the "start line" decision as input. The counter (N...
by Steven Seagal
Thu Nov 30, 2017 3:16 pm
Forum: News & Announcements
Topic: I, Zarchos, have a major announcement that will
Replies: 34
Views: 4042

Re: I, Zarchos, have a major announcement that will

Nah, he will announce the release of Steem SSE 3.9.4.
by Steven Seagal
Thu Nov 30, 2017 10:00 am
Forum: Support
Topic: Steem 3.9.3 problem
Replies: 45
Views: 3952

Re: Steem 3.9.3 problem

Zamuel_a wrote:When I run 3.9.3 on my laptop and wakes it up after hybernation I get error: BLIT ERROR and I must restart Steem.


I don't claim it's definitely fixed, but there are chances the new 3.9.4 version can recover from BLIT ERROR.
by Steven Seagal
Thu Nov 30, 2017 9:57 am
Forum: Development
Topic: Steem SSE 3.9
Replies: 107
Views: 18351

Re: Steem SSE 3.9

Steem SSE 3.9.4 was released on 30/11/2017. v3.9.4 Features _________________ - Dongles: Jeanne d'Arc (French). - A DirectDraw build of the Boiler is now available. - Notice: Option 'Alt YM2149 emu' (MAME-like PSG emulation) moved to sound page. Option 'Machine/Wake-up' is now persistent (and the de...
by Steven Seagal
Wed Nov 29, 2017 4:20 pm
Forum: Hardware
Topic: How I found some original Atari ST ASIC designs
Replies: 79
Views: 11784

Re: How I found some original Atari ST ASIC designs

Is this not exactly what I've deduced before? It's nice to see it confirmed by the schematics of course :) It's also the reason for the (so far not used by anyone I believe) +4 and +6 lines possible to create on STE. From the writeup on the wiki: The following pseudo code describes how PRELOAD gets...
by Steven Seagal
Wed Nov 29, 2017 3:35 pm
Forum: Hardware
Topic: How I found some original Atari ST ASIC designs
Replies: 79
Views: 11784

Re: How I found some original Atari ST ASIC designs

Yep, it is easier to read schematics :) He he :mrgreen: DPR and DPS are synchronous flip flops with async reset and (pre)set respectively. The circuit at the output with the two NOR gates is an SR-latch. That's the register that actually holds the state of the internal HSYNC signal. Thx again... Do...
by Steven Seagal
Mon Nov 27, 2017 10:15 pm
Forum: Hardware
Topic: How I found some original Atari ST ASIC designs
Replies: 79
Views: 11784

Re: How I found some original Atari ST ASIC designs

So I could match the horizontal sync generator schematic on sheet 26 with some of ijor's pseudo-code (values 101, 111, 121, 127...). Guess it's easier with the blueprints than looking directly at the chip. :) But on the right of the "comparators", there are rectangles called DPR and DPS. O...
by Steven Seagal
Sun Nov 26, 2017 6:14 pm
Forum: Hardware
Topic: How I found some original Atari ST ASIC designs
Replies: 79
Views: 11784

Re: How I found some original Atari ST ASIC designs

OK thx, it starts to make sense.
There's also MDE1 and MDE1B for example: bit 1 of shift mode set and cleared respectively.
I'll try to match this sheet with your pseudo-code for HSYNC and come back with more questions.
One last today: what could be the ubiquitous PORB?
by Steven Seagal
Sun Nov 26, 2017 4:50 pm
Forum: Hardware
Topic: How I found some original Atari ST ASIC designs
Replies: 79
Views: 11784

Re: How I found some original Atari ST ASIC designs

Thx. Funny but my google searches didn't deliver. :shrug: Do you reckon the schematics are precise and complete enough to write a GLUE-MCU video logic for emulation? Too bad the STE Shifter is still a black box. I don't know if you plan to release some analysis in the near future, in that case there...
by Steven Seagal
Sun Nov 26, 2017 2:31 pm
Forum: Development
Topic: Steem SSE 3.9
Replies: 107
Views: 18351

Re: Steem SSE 3.9

To be fair we all do what we can but giving support isn't much fun compared with improving emulation or introducing exciting features. I certainly didn't branch Steem to give support but that's the way it is. :mrgreen:
by Steven Seagal
Sun Nov 26, 2017 2:23 pm
Forum: Hardware
Topic: How I found some original Atari ST ASIC designs
Replies: 79
Views: 11784

Re: How I found some original Atari ST ASIC designs

Hi
Has somebody analysed the schematics for the GLUE-MCU?
Did I miss the thread?
I've started doing it but not being in the field, I've more questions than answers... :shrug:
For instance, what are those trapeziums called "SAB"?
by Steven Seagal
Sun Nov 26, 2017 2:08 pm
Forum: Development
Topic: Steem SSE 3.9
Replies: 107
Views: 18351

Re: Steem SSE 3.9

I would to ask what is situation, what are plans about Linux builds ? As I see latest v. for Linux is 3.7 . I'm aware that it is lot of extra work, so other platform has priority. And Linux distros make it not easy in fact. They make lot of changes, so old builds may not work as well. I experienced...
by Steven Seagal
Sat Nov 25, 2017 6:47 pm
Forum: Hatari
Topic: Hatari 2.0.0 has been released
Replies: 93
Views: 14115

Re: Hatari 2.0.0 has been released

Maybe a section for support/bug reports should be created like for Steem?
by Steven Seagal
Sat Nov 25, 2017 6:35 pm
Forum: Development
Topic: Steem SSE 3.9
Replies: 107
Views: 18351

Re: Steem SSE 3.9

I checked it but please don't post bug reports here.
http://www.atari-forum.com/viewtopic.php?f=112&t=32377

Release of v3.9.4 is planned for the end of this month, which is this week.
Steem Thursday will be a bigger event than Black Friday, and more disinterested.
by Steven Seagal
Sat Nov 25, 2017 8:39 am
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 195
Views: 15038

Re: Req : "Audio Sculpture" (STX,...) even not running...

Maybe the STOP is handled differently?
by Steven Seagal
Sat Nov 25, 2017 8:38 am
Forum: Support
Topic: Steem 3.9.3 problem
Replies: 45
Views: 3952

Re: Steem 3.9.3 problem

amilo3438 wrote:(and does it run on an real STE?)


No, I already tested that, it hangs.
Guess the pouet page is incorrect or there's a config issue.
by Steven Seagal
Thu Nov 23, 2017 7:21 pm
Forum: Demos - General
Topic: STE 16 Pixel Trick
Replies: 19
Views: 11619

Re: STE 16 Pixel Trick

Here's an explanation for the trick. When writing on address $FF8264, the HSCROLL register in the Shifter is modified. When writing on address $FF8265, the HSCROLL register in the Shifter is modified, and the "prefetch" flag in the Glue is changed (set if value<>0, cleared otherwise). Timi...
by Steven Seagal
Wed Nov 22, 2017 5:10 pm
Forum: Support
Topic: Steem SSE 3.9.3. Win32 D3D - Fullscreen/Crisp without borders possible?
Replies: 3
Views: 403

Re: Steem SSE 3.9.3. Win32 D3D - Fullscreen/Crisp without borders possible?

Hi, What is your display resolution? There's no miracle, if you want correct aspect ratio, some borders have to be created, on top & bottom, or on the sides if your display is wide. And if you want crisp display, the pixel multiplier needs to be an integer. Hence the borders. You may try a DD bu...
by Steven Seagal
Sun Nov 19, 2017 8:29 pm
Forum: Steem
Topic: Jeanne d'Arc [French version]
Replies: 7
Views: 1107

Re: Jeanne d'Arc [French version]

No problem, it's interesting in itself and it gives me something to feature in v3.9.4.
by Steven Seagal
Sun Nov 19, 2017 5:32 pm
Forum: Steem
Topic: Jeanne d'Arc [French version]
Replies: 7
Views: 1107

Re: Jeanne d'Arc [French version]

Apparently WinUAE doesn't support it... but the latest Steem beta does.
by Steven Seagal
Sat Nov 18, 2017 6:56 pm
Forum: Steem
Topic: Jeanne d'Arc [French version]
Replies: 7
Views: 1107

Re: Jeanne d'Arc [French version]

Downloaded the game at atarimania. It doesn't crash, it leaves properly calling PTerm() and all :) Not sure yet but this dongle looks more annoying than the others, it seems to constantly trigger interrupts under some conditions. Emulating this is heavier than changing some port bit. EDIT: heavier d...
by Steven Seagal
Sat Nov 18, 2017 6:50 pm
Forum: Support
Topic: Steem 3.9.3 problem
Replies: 45
Views: 3952

Re: Steem 3.9.3 problem

Maybe I've seen it before.
The demo hits at cycle 4 for the left border trick, 2 cycles too late for the STE.
by Steven Seagal
Sat Nov 18, 2017 6:45 pm
Forum: Steem
Topic: STEEM new user
Replies: 15
Views: 1775

Re: STEEM new user

I think that the fact that it was under an alternative OS Magic was important enough to be disclosed at once!
Of course one assumes it's under TOS.
by Steven Seagal
Thu Nov 16, 2017 9:51 pm
Forum: Support
Topic: Graphical glitches in 3.9.3 linked to "Wake up" state
Replies: 17
Views: 1377

Re: Graphical glitches in 3.9.3 linked to "Wake up" state

It is one of the confusing options in Steem SSE, and that's why it is now hidden unless option 'Advanced Settings' is checked. 'Ignore' would disable more analysis in v3.9.2. Normally, the demo "Closure" works whatever the option in v3.9.3 (still need ADAT, not my fault :mrgreen: ) but in ...
by Steven Seagal
Thu Nov 16, 2017 8:37 pm
Forum: Support
Topic: Graphical glitches in 3.9.3 linked to "Wake up" state
Replies: 17
Views: 1377

Re: Graphical glitches in 3.9.3 linked to "Wake up" state

No, 'ignore' defaults to the wakestates I said for frequency and compatibility reasons, but some "shifter tricks" are then not tested. Like "destabilisation" (Bee demos, etc.). In the case of OVRII, it allows you to have the demo without glitch. It makes sense because the test fo...

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