New Batch of PCB/CPDL-sets available

General discussion forum - for all that doesn't fit in any other category.
Jeff
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Post by Jeff » Mon Oct 06, 2008 7:32 pm

CrazyIcecap wrote:
Jeff wrote:
CrazyIcecap wrote: - called it a crappy design -
mmhh what do mean exactly ?
I don't know, he is a little picky about stuff like that.
i'm really curious to know what is "crap" in this design... i like to learn... :evil:
who is "he" ?
CrazyIcecap wrote:
and this batch might be the last one
i don't think so...
OK, the last one from me ;-)

This stuff is growing over my head now....orders from UK, France, Croatia, Spain, Japan....

Actually my source for the CPLDs is now empty, 20 pieces....
I fully understand this. This is a too big work regarding of the profit (near to 0).

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Post by CrazyIcecap » Mon Oct 06, 2008 8:13 pm

I really don't know, he calls it "räudiges Design" in german, thats translateable with "crappy"....
Who is Individual Computers / Jens Schönfeld? He is some kind of Amiga-Hardware Guru, call him Mr. "C-One", "Catweasel-Controller", "X-Surf", etc.

http://www.jschoenfeld.com/indexe.htm

some of his products:

http://www.jschoenfeld.com/products/products_e.htm
http://www.jschoenfeld.com/news/news130_e.htm

Jeff
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Post by Jeff » Mon Oct 06, 2008 8:55 pm

CrazyIcecap wrote:I really don't know, he calls it "räudiges Design" in german, thats translateable with "crappy"....
Who is Individual Computers / Jens Schönfeld? He is some kind of Amiga-Hardware Guru, call him Mr. "C-One", "Catweasel-Controller", "X-Surf", etc.

http://www.jschoenfeld.com/indexe.htm

some of his products:

http://www.jschoenfeld.com/products/products_e.htm
http://www.jschoenfeld.com/news/news130_e.htm
lol, oh i see. But in fact he is not the real/the only author of all these products ?

having said that, i will remember of this...

Last question : in what occasion did he said this?

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Post by CrazyIcecap » Mon Oct 06, 2008 9:33 pm

He is the designer of most of that products.
Peter was writing about the HxC in th a1k.org-forum, and Jens said "If you realy want to use that crappy design (no write-support and stone-age-CPLD), at least replace those 74ls05 with 74ls06"

Jeff
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Post by Jeff » Mon Oct 06, 2008 11:51 pm

CrazyIcecap wrote: He is the designer of most of that products
mhh i am not sure. Even the C-One ?
CrazyIcecap wrote: Peter was writing about the HxC in th a1k.org-forum, and Jens said "If you really want to use that crappy design (no write-support and stone-age-CPLD), at least replace those 74ls05 with 74ls06"
So, now i can answer something:

-> Why i choose a max7000 device ?
Simply because this chip is in PLCC package and that it can be easily solder by any hobbyist.
This is one important criteria of the project : the board must be as simple as possible to be make by most hobbyist.
When i see how many device there are actually, i think we have reached this goal.
Yes, i know that the MAX7000 is an old chip and that it limit the device to a read only support due to his small number of macrocell, but it allowed me to build a device that any hobbyist can reproduce.
And i can add that this CPLD allowed me to make something more powerful than an normal uC:
The bitrate can go up to 1Mbits and can changed in real-time. This allow the full support of IPF and Pasti/STX images. I think that it's the first floppy emulator doing this.

Two years ago, we (Torlus and me)have thought to change this CPLD by a small FPGA (a Spartan or a Cyclone), but unfortunately the pins with a 0.5 mm pitch was a big problem.
Do you really think that there would be near 100 devices today if we used an TQFP100 FPGA? I don't think so. (soldering the small FTDI chip is already a problem for some persons..)

But you know, this is a false problem : Take the VHDL code, synthesis it for a Spartan or a Cyclone (or whatever you want ) chip and you have your "new" floppy emulator :roll: .

That's what Torlus did before having the actual board:
http://www.obsolete-tears.com/hist/vm2006/PICT0023.jpg (2006)

And that's what i did to test the write support (Yes, there are a version with the write support):
http://hxc2001.free.fr/floppy_drive_emu ... vboard.jpg

And that's what i did for the first stand alone version (2007):
http://hxc2001.free.fr/floppy_drive_emu ... MG3193.jpg

To be honest, if i could make this emulator with TTL logic chips, I would! Oh my god but I have already did it !
http://hxc2001.free.fr/floppy_drive_emu ... First2.jpg (the “concept board” of the project :wink: ) :lol: :lol: :lol:


I have found the original text from jens about the 74ls06:
Again here Jens have missed the point:
What he wrote is true if you make the design of the host part of the floppy interface, but not the drive part :
74LS05 drive only one resistor : the pull-up present on the host system, even if you plugged 2 or more floppy drive on the bus: Like the HxCFloppyEmulator, disk drives don't have pull-up on theirs outputs... :roll:
But 74LS06 shouldn't make problem,so why not. :wink:

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Post by CrazyIcecap » Tue Oct 07, 2008 4:45 am

I really don't have any problems with the design, its easy to solder :-)
You did a great job!

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Post by Jeff » Tue Oct 07, 2008 7:13 am

CrazyIcecap wrote:I really don't have any problems with the design, its easy to solder :-)
You did a great job!
:D

However i think i will post something on the a1k.org forum. i hate this kind of thing...

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Post by Jeff » Thu Oct 09, 2008 10:40 pm

Jeff wrote:
CrazyIcecap wrote:I really don't have any problems with the design, its easy to solder :-)
You did a great job!
:D

However i think i will post something on the a1k.org forum. i hate this kind of thing...
@CrazyIcecap & PeterSieg :

I recommend you to have a look to this thread regarding the usage of the 74LS06 on the hxcfloppyemulator:
http://www.a1k.org/forum/showthread.php?t=12301&page=2
Zitat:
Zitat von botfixer
Sorry Lars,

but Jeff is right.

On the following I/O is no pull on any diskdrives (or not on drives i know):

2 = DC
8 = Index
26 = TRK00
28 = WP
30 = RD
34 = RDY

Have a look on some amiga schematics, you see that this lines are pulled by the Amiga mainboard. So 74LS05 theoretical matches.

But:

@Jeff: When pulling with 1K (like all Amigas) you get 5mA. So maybe it is a hard borderlined design.
What issue do you expect when using LS06 TTL? Problems? Sure, really? Can´t believe!
In my point of view the LS06 has the better switching characteristics.

up until now i thought that the 74ls06 wasn't a problem (i said "why not" in my first post).
but after some measurements, i found a problem (that was foreseeable...).
Look at this, i think you will understand....

Image

The 74ls06 overdrive bus lines. therefore,severe ringing appears to the Paula's inputs…
Finally, Jens's idea (change 74LS05 by 74LS06) isn't so good...
For the moment, If you like your Amiga, i recommend to use 74LS05 output driver as indicated in the original schematic/ part list ...

Jeff / HxC2001
Often it's not good to trust to guru. ;-)

petersieg
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Post by petersieg » Fri Oct 10, 2008 11:27 am

So, back to 74LS05.. :cry:

Anyway. I have my last 6 sets plus 2 pcb only available.
More information here:
http://www.forum64.de/wbb3/index.php?pa ... post268194

After these are gone.. my source of cpld's is completedly dry..
so no more pcb and/or cpld will be available from me!

So anyone still interested.. hurry up to apply for one of my last sets/pcb..

Peter

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Post by Torlus » Sat Oct 11, 2008 7:16 am

petersieg wrote: So anyone still interested.. hurry up to apply for one of my last sets/pcb..
Well, I'd like to get one set, if you don't mind ;)
Please tell me how to proceed.
Regards,
Greg

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Post by Jeff » Sat Oct 11, 2008 9:20 am

Torlus wrote:
petersieg wrote: So anyone still interested.. hurry up to apply for one of my last sets/pcb..
Well, I'd like to get one set, if you don't mind ;)
Please tell me how to proceed.
Regards,
Greg
Try to contact petersieg directly here :

http://www.forum64.de/wbb3/index.php?pa ... &pageNo=13

or CrazyIcecap here :
http://www.forum64.de/wbb3/index.php?pa ... adID=25491

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Post by petersieg » Sat Oct 11, 2008 12:33 pm

@Torlus: Your are one (together with Jeff) of the developers .. right?
If so, just send me your address via e-mail to peter (dot) sieg1 (at) gmx (dot) de. You get one set for free. Jeff, if you want one too, just let me know!

Many thanks for the development!!

Best regards,
Peter

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Post by Jeff » Sat Oct 11, 2008 2:28 pm

petersieg wrote:@Torlus: Your are one (together with Jeff) of the developers .. right?
If so, just send me your address via e-mail to peter (dot) sieg1 (at) gmx (dot) de. You get one set for free. Jeff, if you want one too, just let me know!

Many thanks for the development!!

Best regards,
Peter
petersieg wrote:@Torlus: Your are one (together with Jeff) of the developers .. right?
Yes, he is!
petersieg wrote:Jeff, if you want one too, just let me know!
Many thanks for the proposition! :D. I'm interested!

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Post by Torlus » Sat Oct 11, 2008 2:50 pm

petersieg wrote:@Torlus: Your are one (together with Jeff) of the developers .. right?
If so, just send me your address via e-mail to peter (dot) sieg1 (at) gmx (dot) de. You get one set for free. Jeff, if you want one too, just let me know!
That's very nice of you Peter, thanks :D

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Post by petersieg » Sat Oct 11, 2008 3:32 pm

Many thanks for the proposition! Very Happy. I'm interested!
Just send me your address Jeff.. One is now reserved for you.

Many thanks,
Peter

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