Search found 99 matches

by tin
Sun Sep 02, 2018 7:36 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Here's the previous IMP set in 8ns and with dl3, dl6 and two different lowrez "shiftedleft" cases added. Thanks once more again. But seems to me again that some of the traces might have the wrong resolution. This looks like low rez, and not med rez: C070713-002IMP_med_50hz_dl3.vcd Thanks ...
by tin
Mon Aug 13, 2018 7:03 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Here's the previous IMP set in 8ns and with dl3, dl6 and two different lowrez "shiftedleft" cases added. http://absencehq.de/atari/shifter_tests_v2.zip Also: rechecked that the banded case is a "true" banded case, not just a plane shift - my testbed had all planes fully set and o...
by tin
Mon Aug 13, 2018 4:14 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Regarding „banded“ and „shifted“ ... I suspected something like that. But the trace bandwidth (50 MHz) is a bit too low and then it's difficult to analyze unless you know beforehand what you are looking for. I'll do proper 8ns ones later, these effects are pretty easy to recreate on this IMP set, i...
by tin
Mon Aug 13, 2018 7:41 am
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

You‘re welcome :) I‘ll add those traces to the big packgage including PNGs asap. Regarding „banded“ and „shifted“: „banded“ shows every 2nd column (16 pixel block)one column background color although it should show gfx data. In this case it might be a plane effect, have to check palette and plane da...
by tin
Sun Aug 12, 2018 2:51 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

But something is odd with this new trace on low rez (any chance you mixed up and it is actually on med rez?). Can you make one or two more. Only with the full IMP chipset, only on LOW rez. If you can with two different powerup cycles. And please make sure that the screen is solid. That is, the star...
by tin
Mon Aug 06, 2018 10:17 am
Forum: Hardware
Topic: The SECRET VIDEO MODE in an ST: 400 lines in COLOR (and with 72 Hz)!
Replies: 81
Views: 11207

Re: The SECRET VIDEO MODE in an ST: 400 lines in COLOR (and with 72 Hz)!

For the record: this mode (1280x200x2@50Hz) works fine with an NEC1970NXp, centurion/ubeswitch tested. This even worked in the NewRez Desktop driver, but with the mono font, so it looked more like 1280x100, aka totally unsuable :/ Wait, what? Did you really use an ubeswitch with auto detection of m...
by tin
Sat Aug 04, 2018 3:20 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Thanks for the video tin. That's really interesting (and a bit of a shame). You're welcome :) Nothing to worry about - as you said, your screen worked on most STs people used at the time it was released. Thanks alot for your fabulous work, you made many of us scratch our heads back then. Unfortunat...
by tin
Sat Aug 04, 2018 3:12 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Potentially silly question, but what type of screen are you recording from? CRT or LCD? I can only speak for the video recordings: there was no screen involved, it's a (more or less) direct RGB capture. The capture card proved quite stable in the past (which will ofc change, now that I mentioned it...
by tin
Sat Aug 04, 2018 3:07 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

I finally came around to fix my IMP board (I fried the Vsync diode somehow). So here's revision 2 of the LA capture package: http://absencehq.de/atari/shiftercaptures_r2_c025914-38_38A_c070713-002.zip Changes: -added traces for C070713-002 8833 low/mid 50Hz using a full IMP chipset board -fixed typo...
by tin
Sat Aug 04, 2018 1:15 pm
Forum: Hardware
Topic: The SECRET VIDEO MODE in an ST: 400 lines in COLOR (and with 72 Hz)!
Replies: 81
Views: 11207

Re: The SECRET VIDEO MODE in an ST: 400 lines in COLOR (and with 72 Hz)!

... and: 1280 x 200 (mono, untested because I don't have a suitable monitor), For the record: this mode (1280x200x2@50Hz) works fine with an NEC1970NXp, centurion/ubeswitch tested. This even worked in the NewRez Desktop driver, but with the mono font, so it looked more like 1280x100, aka totally un...
by tin
Sat Aug 04, 2018 12:23 pm
Forum: Hardware
Topic: The SECRET VIDEO MODE in an ST: 400 lines in COLOR (and with 72 Hz)!
Replies: 81
Views: 11207

Re: The SECRET VIDEO MODE in an ST: 400 lines in COLOR (and with 72 Hz)!

This is something I patched right after czietz revealed this: http://absencehq.de/atari/newrez_prealpha.zip I hoped to give it a thorough testing, but with the weather and all - it's your turn ;-) This is a patched version of (or rather horribly hacked version of the horribly hacked) Overscan 1.6, t...
by tin
Tue Jul 31, 2018 9:40 pm
Forum: Hardware
Topic: The SECRET VIDEO MODE in an ST: 400 lines in COLOR (and with 72 Hz)!
Replies: 81
Views: 11207

Re: The SECRET VIDEO MODE in an ST: 400 lines in COLOR (and with 72 Hz)!

Great findings! I’m also having a very keen interrest seeing this discoveries impact on sync switches.
by tin
Fri Jul 27, 2018 2:39 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Ah, ok, no problem at all. The only interesting thing remaining at this point might be to measure Shifter wakestates with the IMP Shifter. But this might be better done on the full IMP chipset system. So I won't bother you anymore for the time being :) You don't :) Well, since you mention wakestate...
by tin
Fri Jul 27, 2018 5:01 am
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

ijor wrote:But just to be sure, that's indeed the code of the IMP Shifter (C025914-002) or it's a typo?

I'm pretty sure it's a typo and the shifter is a C070713-002 model. I can't check atm -- but will do in a few days and fix the package accordingly. It was probably just too hot.
by tin
Mon Jul 23, 2018 7:39 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Here are the shifter traces: http://www.absencehq.de/atari/shiftercaptures_c025914-38_38A_c025914-002_cboard.zip The package has traces C025914-38/38A and C025914-002 shifters on a C070523-001 Rev D board (non-IMP chipset)in med and low rez. It contains Screenshots and also CSV/VCD files of the trac...
by tin
Thu Jul 19, 2018 7:03 am
Forum: Professionals
Topic: Dead F030 count
Replies: 18
Views: 1671

Re: Dead F030 count

Same as ggn: a CT2 (CT2a iirc) equipped machine used to work fine but doesn‘t anymore. No signal in both modes. IIRC it had a limbo state where only the non accelerated mode worked. Didn‘t investigate further, but will do. Thats the first Falcon I‘ve seen failing completely (and I personally poured ...
by tin
Thu Jul 19, 2018 6:54 am
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Just a quick status update. I don‘t have the traces yet (ah, the joys of getting sidetracked!) but I plan to bring the IMP board etc. to Nordlicht party and do traces there. There’s nothing like a quiet partyplace to do these things ;)
Monday there shall be traces.
by tin
Wed Jul 11, 2018 8:03 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Here's a first baseline test with the 38A shifter in a non-IMP environment (100Mhz sampling, beginning of a solid green desktop line): 38a_la.png Now that the Test Clip is set up, churning out more traces gets pretty easy and changing the shifter is a matter of seconds. Let me know if these traces a...
by tin
Sun Jul 08, 2018 10:13 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Wow. Thanks a lot for the videos, really very nice! You‘re welcome :) GLUE wakestates might be relevant on Closure because as Troed is saying, he uses different code paths depending on the detected wakestate. But on Alien's scroll, it is almost certain that what matters is the SHIFTER wakestate. I ...
by tin
Sun Jul 08, 2018 1:48 pm
Forum: Demos
Topic: We won!
Replies: 24
Views: 2671

Re: We won!

Congrats! Theres alot to like (like, everything) in there :)
by tin
Sun Jul 08, 2018 1:36 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

The additional screen corruptions in the 260 are strange, have to retest that, too. Screen artefacts and bands are the same between that 260 and the captured MB. The camera I took the screenshots with did blend 2 frames, that‘s why the bands aren‘t clearly visible. Btw, it is possible to fit a ZIF ...
by tin
Sun Jul 08, 2018 1:15 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Here are a few quick video captures (50Hz, no sound, direct ST RGB feed). All done on same MB with -38 and re-verified to run OK with -38A. Unfortunately I didn't log the respective wakestates. PYM: Closure Intro (two different power cycles, didn't check Wakestate): Closure other parts: Closure fail...
by tin
Sat Jul 07, 2018 11:45 am
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Btw, it is possible to fit a ZIF socket into a regular socket, or it can only be soldered? You can squeeze them in, but that probably damages the original sockets‘ contacts (the ZIFs pins are pretty wide). I did that on this particular test MB since I don‘t plan to remove the ZIF. tin - if that 260...
by tin
Fri Jul 06, 2018 6:36 am
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Thanks a lot for the test! You‘re welcome - I have one MB rigged with a ZIF socket just for shifter tests like this :) Had to do this test on two differrent machines for now though, will retest with the same motherboard ASAP. It doesn't work or the video is corrupted? Can you describe in which way,...
by tin
Thu Jul 05, 2018 6:57 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 5775

Re: Different SHIFTER versions

Interresting. It indeed does not work with the C025914-38 shifter (tested on an 260 ST). Never noticed that. Works fine on 38A though (obviously).

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