Search found 581 matches

by JimDrew
Mon Nov 20, 2017 5:28 am
Forum: MiSTer
Topic: RTC board
Replies: 26
Views: 1314

Re: RTC board

Sorgelig wrote:
THaase wrote:Thanks a lot - may I know which components you've used?

i wrote the part numbers in schematics. See the PDF file.


The pdf doesn't have the full BOM. What battery holder did you use?
by JimDrew
Sat Nov 18, 2017 12:14 am
Forum: MiSTer
Topic: Buy / Sell MiSTer Expansion Boards
Replies: 40
Views: 5719

Re: Buy / Sell MiSTer Expansion Boards

I got bare boards in today. I will be offering the bare boards shipped world-wide. I might offer the RAM boards assembled, but I am not sure if I will be offering any others assembled. I didn't realize that these boards are double-sided (components). This requires gluing each component to the board ...
by JimDrew
Mon Nov 13, 2017 1:21 am
Forum: MiSTer
Topic: Buy / Sell MiSTer Expansion Boards
Replies: 40
Views: 5719

Re: Buy / Sell MiSTer Expansion Boards

I mean bare add-on boards, add-on board kits, and fully assembled add-on boards. I will not be selling the DE-10. I already tried to purchase them in quantity, and the Terasic won't allow it with any type of discount. If you are a student, you can purchase the board from them directly for $99 inste...
by JimDrew
Sun Nov 12, 2017 4:26 pm
Forum: MiSTer
Topic: Buy / Sell MiSTer Expansion Boards
Replies: 40
Views: 5719

Re: Buy / Sell MiSTer Expansion Boards

I mean bare add-on boards, add-on board kits, and fully assembled add-on boards. I will not be selling the DE-10. I already tried to purchase them in quantity, and the Terasic won't allow it with any type of discount. If you are a student, you can purchase the board from them directly for $99 instea...
by JimDrew
Fri Nov 10, 2017 10:44 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Hmm... I don't see this much variance with any setup I have here. How are you determining the number of samples?
by JimDrew
Wed Nov 08, 2017 4:22 pm
Forum: MiSTer
Topic: Buy / Sell MiSTer Expansion Boards
Replies: 40
Views: 5719

Re: Buy / Sell MiSTer Expansion Boards

I ordered 50 of each IO, RTC, and RAM boards. I will be offering bare boards for sale, along with kits, and fully assembled versions.
by JimDrew
Tue Nov 07, 2017 7:46 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

LOL! Sorry, remember I am not an "Atari guy". I spent most of my life (from 1977 til now) working on Commodore stuff. I never made products for the Atari line, but I sold a lot of Supercard Ami's to Atari ST user groups that used an Amiga 500 to back up their Atari ST disks. :)
by JimDrew
Tue Nov 07, 2017 4:07 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

I will have to unpack my ST (all of my non-CBM machines are still packed due to my move). SCP already looks at the target drive and adjusts the bitcells so they are the same length (in time) for the rotational speed of the target drive. This was necessary because sometimes people dump disks with a 3...
by JimDrew
Mon Nov 06, 2017 8:41 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

The protection relies on how the WD1772 actually decodes the write splice as part of the track read. It's the reason why the protection needs the key written separate after whatever created the protection reads the track. The WD1772 does different things. If the write splice created weakbits, you co...
by JimDrew
Mon Nov 06, 2017 8:02 pm
Forum: MiSTer
Topic: Buy / Sell MiSTer Expansion Boards
Replies: 40
Views: 5719

Re: Buy / Sell MiSTer Expansion Boards

Yes, I will have them on my website (www.cbmstuff.com). I ship world-wide.
by JimDrew
Sun Nov 05, 2017 7:01 pm
Forum: MiSTer
Topic: Buy / Sell MiSTer Expansion Boards
Replies: 40
Views: 5719

Re: Buy / Sell MiSTer Expansion Boards

If anyone in the U.S. is interested, I am going to build a batch of add-on boards. I have SMT equipment here for making prototypes, so I can build a few dozen sets in an afternoon.
by JimDrew
Sun Nov 05, 2017 3:41 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Not in this specific case, but this sometimes can be a big problem. The dumps don't tell us the original index position, but only the position in the drive that was used to make the dump. And the relative index position in some drives can be quite different. This is true, however, a copy protection...
by JimDrew
Fri Nov 03, 2017 11:25 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Exactly - the bytes between write splices. Not exactly the bytes between write splices. The key is the few bytes around the write splice. No... exactly. Write splice to write splice of course includes 100% of all bytes. Not in this specific case, but this sometimes can be a big problem. The dumps d...
by JimDrew
Fri Nov 03, 2017 3:56 am
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Not at all. The protection reads the exact full, circular (which means including the data that crosses the write splice), content of the track as it is interpreted by the PLL. Exactly - the bytes between write splices. This is a protection used on a couple of Amiga disks too. The write splice relat...
by JimDrew
Thu Nov 02, 2017 7:34 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

For a standard FDC like the WD1772, 8277A, etc., where it's not really possible to measure the time between bitcells (it's difficult enough to measure the time for each sector like with Rob's protection), you could get away with bitcells varying in length. The key is to make sure that from write spl...
by JimDrew
Thu Nov 02, 2017 4:03 am
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

I don't think you have worked with actual flux much. I think you are thinking in terms of the WD1772 (or even MFM). You can certainly write a track with the exact same number of bitcells, and it doesn't matter where the index pulse is. You don't really need that much fiddling for flux. The only thin...
by JimDrew
Wed Nov 01, 2017 10:27 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

It was a spurious fix. Today I tried to mimic Pasti. Apparently, the key is: If the TR00* input does not go active low after 255 stepping pulses, the WD1772 terminates operation, interrupts, and sets the Seek Error status bit, providing the v flag is set. It's interesting to note that the HxC flopp...
by JimDrew
Wed Nov 01, 2017 10:25 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

A write splice can certainly produce a weakbit if the bitcell time is under what is considered a "normal" bitcell length. As I stated before, the goal of the SuperCard Pro copier was to reproduce the write splice location and bitcell length. The index to index time vs. the number of bitcel...
by JimDrew
Wed Nov 01, 2017 4:27 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Ha! No, what I meant is that the disk is old and likely a bit dirty. The flux is not as stable as a disk that was freshly written. The image you made is fine, and seems to work in STEEM.
by JimDrew
Wed Nov 01, 2017 4:12 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Just to be sure: could we consider the dumps I made (STX, SCP & RAW) as safe? Jim Drew said in a previous message that the first disk is a bit dirty. Aufit displays a clean picture of this disk and I can't see dirt in the used sectors: Audio Scuplture 1.3.png Does is it mean the 5 rev have corr...
by JimDrew
Wed Nov 01, 2017 4:08 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Yes, I read your posts, and I simply do not agree. I can reproduce *any* track exactly the same as the flux read (down to the last bit length) ... You can reproduce anything except the exact original behavior of the write splice itself. And by that I mean what exactly do you read at the write splic...
by JimDrew
Wed Nov 01, 2017 3:58 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

I read those, thanks. Does this program really require TOS1.02? It doesn't work with TOS2.06 under STEEM, and I think my STFM's are all 2.06, so testing may not even be possible. From a quick test under Hatari, it crashed with TOS 2.06, but at least it's after the protection check. So if you manage...
by JimDrew
Wed Nov 01, 2017 4:13 am
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Yes, I read your posts, and I simply do not agree. I can reproduce *any* track exactly the same as the flux read (down to the last bit length), regardless of drive speed. In this case, track 3 (for sure) has data under the index pulse and it requires SPLICE mode (or the analyzer/editor) to duplicate...
by JimDrew
Tue Oct 31, 2017 10:06 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Does this program really require TOS1.02? It doesn't work with TOS2.06 under STEEM, and I think my STFM's are all 2.06, so testing may not even be possible. Not the best config to test games! Did you consider downgrading? :) I have a set of TOS1.02 ROMs, and two STFM computers. I need to make one a...
by JimDrew
Tue Oct 31, 2017 10:04 pm
Forum: Applications
Topic: Req : "Audio Sculpture" (STX,...) even not running...
Replies: 190
Views: 7347

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

Yes, I meant track 3... and tracks 0-2/4-79 done as INDEX, with track 3 done as SPLICE. The flux data is definitely there, or it wouldn't work under STEEM - and it does perfectly. The very last thing that this program does before popping up the main screen (after the nifty intro) is check track 3 an...

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