Search found 2579 matches

by ijor
Fri Jul 27, 2018 3:53 am
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

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. I am starting to check your traces. Thanks a lot once more again. But just to be sure, that's indeed the code of the IMP Shifter ( C025914-002 ) or it's a typo? If so, wo...
by ijor
Thu Jul 26, 2018 7:27 pm
Forum: Hardware
Topic: Reverse engineering of some ICD Link adapter
Replies: 175
Views: 18396

Re: Reverse engineering of some ICD Link adapter

frank.lukas wrote:... exist some of the JED Files from the ICD Hostadapter GALs/PALs ?


Not that I am aware. I actually never heard about any kind of confidential information or data about any ICD product being ever released. Schematics, software or firmware sources, PAL/PLD programming files, nothing, nada :(
by ijor
Tue Jul 24, 2018 2:47 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

tin wrote:Here are the shifter traces: ... Let me know if there's anything to improve on the above package or anythings amiss.


This is just awesome! I am currently on a trip. Will check your traces in a few days. Many thanks!
by ijor
Fri Jul 20, 2018 1:47 pm
Forum: Hardware
Topic: Atari ST floppy drives and their limitations
Replies: 5
Views: 1721

Re: Atari ST floppy drives and their limitations

I don't think anybody made a spreadsheet of tracks per brand and model, if that's what you mean. It wouldn't be perfectly accurate because models aren't always 100% identical. It is perfectly possible that a particular unit might support a different number of tracks than a different unit with the ex...
by ijor
Fri Jul 20, 2018 1:40 pm
Forum: MiSTer
Topic: Real floppy drives with MiSTer?
Replies: 17
Views: 1226

Re: Real floppy drives with MiSTer?

The existence of the HxC floppy drive emulator proves that theory wrong. At least Acorn BBC, Amstrad CPC, Atari ST, IBM PC compatibles and Acorn Archimedes could be considered compatible with each other, both from a "(slightly modified) Shugart-compatible interface" standpoint as well as ...
by ijor
Thu Jul 12, 2018 8:07 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

Smonson wrote:It also starts after the 5th LOAD in Troed's LE captures.


But Troed's captures are at LOW rez, not at MED rez. Low rez always starts later than med rez, and the delay (at LOW rez) is variable and depends on the SHIFTER wakeup.
by ijor
Wed Jul 11, 2018 8:34 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

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 ...
by ijor
Wed Jul 11, 2018 7:18 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

Thanks a lot! Well, that's strange. Are you sure that the RGB signal traced starts right on the left border? Because it is quite late. If indeed that's the left border, then the logic must have been changed in comparison to the -38A version. At low res the exact delay depends on the SHIFTER wakestat...
by ijor
Wed Jul 11, 2018 2:16 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

Sorry, it doesn't. So, (given that my TT is sadly down for repair) today I had some time to play with my IMP STfm. I confirmed that by default there is no diode between +5V and the Shifter's Vcc pin -- I measure 5 V on the IMP Shifter. Then I added the diode, dropping the Vcc of the IMP Shifter to ...
by ijor
Mon Jul 09, 2018 5:27 am
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

The full IMP is also a 1040. I don’t think it has a diode fix on the shifter. Do you happen to have a picture how that (factory) patch looks like? Sorry, I don't. I understand it is a diode added manually, not on the motherboard. The SHIFTER VCC pin is disconnected from the motherboard and is conne...
by ijor
Sun Jul 08, 2018 6:28 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

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. Wow. Thanks a lot for the videos, really very nice! Unfortunately I didn't log the respective wakestates. No so sure GLUE wakestates are the main issue here. S...
by ijor
Sat Jul 07, 2018 9:38 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

While hunting down some bug in EmuTOS, I recently learned that IMP and Ricoh chipsets have different bus error behavior. See my tests summarized in this post on hatari-devel: https://listengine.tuxfamily.org/lists.tuxfamily.org/hatari-devel/2018/04/msg00104.html Since afaik the address decoding is ...
by ijor
Sat Jul 07, 2018 8:59 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

Heh. Closure was tested on 9 different STs ... but yet will fail in some conditions. Now what I didn't know back then is that it's possible to detect whether it's an IMP chipset (GLUE, at least) or not ... don't know if that will help. Sorry, didn't mean to imply you didn't test Closure well enough...
by ijor
Sat Jul 07, 2018 1:54 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

Closure fullscreens should work with the old top border* - but the scrolling-dude screen might not when I think about it. I understand you tested Closure with an IMP Shifter, right? That's why I suspect czietz failure is due to his specific motherboard not being fully compatible with an IMP Shifter...
by ijor
Sat Jul 07, 2018 1:19 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

Did not have time to setup the full test rig, but was able to check the -38 on the ZIFfed MB. Aliens PYM screen shows bands as expected and seen on Christians screenshots. Closure also shows bands in all fullscreens, but they are shifted each line. ... Everything is fine with 38A on the same MB/set...
by ijor
Fri Jul 06, 2018 2:04 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

I'm afraid that particular sync scroll already glitches heavily on my test machine, 1040STfm with the IMP Shifter. (That's the computer I also had trouble with while running the SNDH ... In this case the bands are more clear, those are not just glitches. I believe however that the cause is very dif...
by ijor
Fri Jul 06, 2018 1:59 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

You‘re welcome - I have one MB rigged with a ZIF socket just for shifter tests like this :) Good idea. Btw, it is possible to fit a ZIF socket into a regular socket, or it can only be soldered? See attached. This is with the same disk images that work fine on 38A. Didn't have the time to do a prope...
by ijor
Thu Jul 05, 2018 9:30 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Re: Different SHIFTER versions

Thanks a lot for the test!

It doesn't work or the video is corrupted? Can you describe in which way, or post a picture if that wouldn't be too much of a trouble. Thanks again.
by ijor
Thu Jul 05, 2018 5:00 pm
Forum: Coding
Topic: Different SHIFTER versions
Replies: 65
Views: 4667

Different SHIFTER versions

Breaking news ... :) I still need to confirm with actually testing multiple chips. But at this time I am quite confident that there are some incompatibilities depending on the version of the Shifter chip. e.g., I believe older Shifter version won't display correctly the famous Alien 4-bit (or 4 pixe...
by ijor
Thu Jul 05, 2018 11:22 am
Forum: Applications
Topic: Atari ST Protection Technioques
Replies: 21
Views: 4187

Re: Atari ST Protection Technioques

rcamp48 wrote:I finished the scan , it is definitely ST Protection Techniques, because it mentions The Protector in it, the scan will be at my Mega site.
...
I have troubles on page 110 of the manual ...


Difficult to comment without the manual. Did you uploaded the manual? If so please provide an URL.
by ijor
Wed Jul 04, 2018 3:51 pm
Forum: For sale / Wanted
Topic: [For sale] SatanDisk V4 Compact
Replies: 12
Views: 1380

Re: [For sale] SatanDisk V4 Compact

PCB made from ground based on the Jookie's schematics. Micro USB connector to use with an 5V Android compatible power supply (at least 1a). New 3v3 regulator and better decoupling caps. Sd card protection in case of removed while power on. No ACSI to Satandisk cable required, you just plug the sata...
by ijor
Wed Jul 04, 2018 12:13 pm
Forum: For sale / Wanted
Topic: Need Old SHIFTER version C025914-38
Replies: 10
Views: 956

Re: Need Old SHIFTER version C025914-38

Chandler wrote:If you get stuck i have some -20 i think somewhere


@Chandler You have PM.
by ijor
Tue Jul 03, 2018 11:50 am
Forum: For sale / Wanted
Topic: Need Old SHIFTER version C025914-38
Replies: 10
Views: 956

Re: Need Old SHIFTER version C025914-38

Thanks everybody for looking. The -20 parts are really rare. But I expect the -38 Shifter to be more common, even when obviously not as much as the -38A. And for this purpose I actually prefer the -38 version over the -20 one.

I will check Best Electronics.
by ijor
Mon Jul 02, 2018 9:41 pm
Forum: For sale / Wanted
Topic: Need Old SHIFTER version C025914-38
Replies: 10
Views: 956

Need Old SHIFTER version C025914-38

I need an old version of the SHIFTER chip. It has to be this part C025914-38 . C025914-38A is not good for me, neither one of the newer ones like C070713. It could be C025914-20 as well. But that is the very first version of SHIFTER and it is quite rare. I need it at the US, and because I am traveli...
by ijor
Mon Jul 02, 2018 12:18 am
Forum: Coding
Topic: SHIFTER reimplementation on FPGA
Replies: 78
Views: 7573

Re: SHIFTER reimplementation on FPGA

Nah, I mean an actual capture hardware connected directly through HDMI (or DVI) to your board. I said "compatible" because not every HDMI hardware might accept the signal. Even after your scan doubling, it is still not fully standard. But capture hardware is usually rather tolerant, more t...

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