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by JimDrew
Tue Dec 04, 2018 4:27 am
Forum: MiSTer
Topic: Save States for the cores
Replies: 28
Views: 1521

Re: Save States for the cores

Sorgelig wrote:I like when someone very smart come to explain to dummy me how things are working. Thank you very much - i would not know it without you!


Go read the first word of the first post. My post was certainly not to you.
by JimDrew
Mon Dec 03, 2018 6:55 pm
Forum: MiSTer
Topic: Save States for the cores
Replies: 28
Views: 1521

Re: Save States for the cores

For many FPGA projects that do have save state capability this is typically achieved by having a master system clock that all other clocks in the domain are derived from. Stopping the master clock effectively freezes the entire system, and at that point allows saving whatever DRAM/BRAM and states th...
by JimDrew
Mon Dec 03, 2018 6:49 pm
Forum: MiSTer
Topic: SDRAM board
Replies: 157
Views: 35125

Re: SDRAM board

I believe the fasted requirement for any core is under 120MHz, so it probably doesn't matter if the memory passes at anything higher than that.
by JimDrew
Sun Dec 02, 2018 10:34 pm
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

I am Jim Drew, not Jim Brain. These are different people. I have never made anything that was even remotely compatible with an open source project before, so I think you have me confused with someone else. Again, I am making an expansion board for the DE-10 FPGA developer board. The schematic and PC...
by JimDrew
Sun Dec 02, 2018 7:06 am
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

Ok, I spent the day looking at hundreds of analog captures and I was able to tweak my audio filter to be a little bit better on the pass frequencies. There is an annoyance with certain cores that initialize the audio by doing a massive square wave that is long enough duration to charge the DC blocki...
by JimDrew
Sun Dec 02, 2018 7:01 am
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

Yes, if the board passes Part 15 compliancy requirements.
by JimDrew
Sun Dec 02, 2018 7:00 am
Forum: MiSTer
Topic: FX CAST TOS versions
Replies: 23
Views: 975

Re: FX CAST TOS versions

That's basically what I am trying to do - compile of list of programs that only work under certain versions of TOS.
by JimDrew
Sun Dec 02, 2018 6:59 am
Forum: MiSTer
Topic: SDRAM board
Replies: 157
Views: 35125

Re: SDRAM board

One other thing to mention. When I have a SDRAM board that gets 1 or 2 failures per minute using the latest memory test (the one where you can change the memory speed) I find that I can go back and use the old 167MHz test and I don't get any errors at all. This is repeatable. So, keep that in mind. ...
by JimDrew
Sat Dec 01, 2018 6:34 pm
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

Poobah, that's why you need to use modules that are already single modular certified and then do a simple verification.
by JimDrew
Sat Dec 01, 2018 6:11 pm
Forum: MiSTer
Topic: FX CAST TOS versions
Replies: 23
Views: 975

Re: FX CAST TOS versions

I did understand what you are saying. You believe that in the history of the Atari ST there was never a program ever written that makes calls to TOS2.06 specific routines (which obviously did not exist in TOS1.02). I have disks that won't boot under TOS1.02, but do boot under TOS2.06 (with a real or...
by JimDrew
Sat Dec 01, 2018 8:48 am
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

Each audio channel on my board is output through a dual pole bandpass filter and line level limiter. I made the lower cutoff at 65Hz. There is a 20dB roll off there which limits potential 50/60Hz noise that might be getting through from the wall adapter (or nearby devices that are radiating). This a...
by JimDrew
Sat Dec 01, 2018 8:29 am
Forum: MiSTer
Topic: FX CAST TOS versions
Replies: 23
Views: 975

Re: FX CAST Atari ST core

I guess over the years you’ve forgotten a few things... No, when it comes to the Atari I am as dumb as a post. :) I am a Commodore person. I got my first ST to play Starglider. :) I got rid of it about 10 years ago or so, and then when I created SuperCard Pro I had to get another machine (and both ...
by JimDrew
Sat Dec 01, 2018 8:06 am
Forum: MiSTer
Topic: SDRAM board
Replies: 157
Views: 35125

Re: SDRAM board

That's good to hear. There is no info in the datasheet pertaining to pin impedance or the effects of stray capacitance, but its pretty apparent that the Winbond chips are very touchy. The Alliance chips don't seem to care too much about solder flux residue.
by JimDrew
Fri Nov 30, 2018 5:43 pm
Forum: MiSTer
Topic: FX CAST TOS versions
Replies: 23
Views: 975

Re: FX CAST Atari ST core

Thanks, I will watch my PM for SCP support! I have tinkered with the Atari ST stuff since they were released. I have 6 different real machines here with mono and color monitors (and thousands of original disks). One machine has TOS1.02 and the rest have TOS2.06. There is no TOS version in between. I...
by JimDrew
Fri Nov 30, 2018 6:45 am
Forum: MiSTer
Topic: FX CAST TOS versions
Replies: 23
Views: 975

Re: FX CAST Atari ST core

OK, thanks for clarifying. As far as I know the U.S. market only had machines with TOS1.02 and TOS2.06. I am not aware of any other version (like TOS1.6) that was actually available here. My point in this is that there are programs that require certain versions of TOS in order to function. Some requ...
by JimDrew
Thu Nov 29, 2018 7:13 pm
Forum: MiSTer
Topic: FX CAST TOS versions
Replies: 23
Views: 975

Re: FX CAST Atari ST core

I have Audio Sculpture and it doesn't load on a real machine with TOS2.06, but it does load on a real machine with TOS1.02. This is also the case for STeeM and Hatari. It seems there many different programs that relied either on TOS1.02 or TOS2.06. I am not an Atari expert by any means, so i don't k...
by JimDrew
Thu Nov 29, 2018 6:50 pm
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

You need to provide source files of schematic and PCB to be able load them into original software and modify them. So, the same way as i provide. I thought you just provided a schematic diagram and gerber data, not files that can be loaded by any original software? If I had use any original files I...
by JimDrew
Thu Nov 29, 2018 6:48 pm
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

To make the board quiet so that it passes FCC verification, 4 layer was not an option. The extra ground/power planes are required. Let's close FCC issue as a plain lie from you. It's already clear you cannot provide the proof. It's just invisible vapor which you are trying to sell. Did you have thi...
by JimDrew
Thu Nov 29, 2018 6:08 pm
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

You need to re-read what I wrote about this. I think you are confused. The DE-10 does not require a FCC certification (no ID), only a verification like any other electronic product that is not an intentional radiator. Either it certified by FCC with unique ID or it's not certified. There in is no o...
by JimDrew
Thu Nov 29, 2018 1:16 am
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

It's not proven. Until real FCC number provided i call it bullshit and false advert. You need to re-read what I wrote about this. I think you are confused. The DE-10 does not require a FCC certification (no ID), only a verification like any other electronic product that is not an intentional radiat...
by JimDrew
Thu Nov 29, 2018 12:47 am
Forum: MiSTer
Topic: FX CAST TOS versions
Replies: 23
Views: 975

Re: FX CAST Atari ST core

Ack... yeah, I meant 2.06 (AmigaDOS is 2.04). :) I will put together a list of programs that don't run. You do know there should be a list here in the main forums of programs that *require* TOS2.06? What drives me nuts is that there are lot of programs that also *require* TOS1.02 (like Audio Sculptu...
by JimDrew
Thu Nov 29, 2018 12:39 am
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

In Europe for us in general CE and other certification are more important. Yes, in the EU you have ETSI and CE. ETSI has similar requirements for peak and average power in most bands. 2.4GHz is one larger exception. EN300-328 rules have no severe lower or upper band edge restrictions, but power is ...
by JimDrew
Wed Nov 28, 2018 5:50 pm
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

The schematic is posted above. The pinout for the GPIO0/1 is the same as MiSTer's I/O board to be compatible with the MiSTer cores.
by JimDrew
Wed Nov 28, 2018 5:32 pm
Forum: MiSTer
Topic: DE-10 Super Expansion board
Replies: 60
Views: 5482

Re: DE-10 Super Expansion board

While I certainly appreciate the hard work you have done on the MiSTer project, my board is not designed specifically for the MiSTer community. That will end up being a small part of the market for this board. I have chosen to keep the functionality and the pinout for the connectors compatible with ...
by JimDrew
Wed Nov 28, 2018 4:01 pm
Forum: MiSTer
Topic: FX CAST TOS versions
Replies: 23
Views: 975

Re: FX CAST Atari ST core

As thgill is saying, and for maximum compatibility, currently it has Uk 1.0 builtin. In a future release you would be able to choose whatever TOS you want (and provide). Ok, then this makes sense why there are compatibility problems during my testing. There are a LOT of games and utilities that req...

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