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Search: Posts Made By: Mathesar
Forum: support.Hardware 19 April 2021, 15:40
Replies: 14
Views: 1,333
Posted By Mathesar
I am not trying to dismiss Jens's judgement....

I am not trying to dismiss Jens's judgement. Power supply *can* be an issue.
However, this particular fault condition is so very similar to something I have seen happening before that I think in...
Forum: support.Hardware 19 April 2021, 13:03
Replies: 14
Views: 1,333
Posted By Mathesar
That would help yes. I don't now the rapidroad so...

That would help yes. I don't now the rapidroad so well but I assume that in a A1200, the USB connectors themselves are in a plastic bracket. so, any ESD current surge will have to go over the cable...
Forum: Hardware mods 19 April 2021, 10:25
Replies: 105
Views: 22,797
Posted By Mathesar
I will have a look. I have a Rigol DS1052E 50MHz...

I will have a look. I have a Rigol DS1052E 50MHz scope with some 60MHz probes. I din't see any reflections but it might indeed be a problem. The only reason for having ACT logic is for the RAM...
Forum: Hardware mods 19 April 2021, 09:12
Replies: 105
Views: 22,797
Posted By Mathesar
Here is a rough diagram I drew up from the scope...

Here is a rough diagram I drew up from the scope measurement.
It's the de-assertation that worries me. E,VMA and AS are all de-asserted a few ns from each other. I got it working better by loading...
Forum: Hardware mods 18 April 2021, 21:46
Replies: 105
Views: 22,797
Posted By Mathesar
Quick update: It is not interrupts. It couldn't...

Quick update:
It is not interrupts. It couldn't be because diagrom does not use interrupts during the CIA tests. :laughing.
So it is indeed E clock timing. I am using ACT logic and the E clock...
Forum: support.Hardware 17 April 2021, 20:08
Replies: 14
Views: 1,333
Posted By Mathesar
Does the rapid road use a Xilinx 9500 series CPLD...

Does the rapid road use a Xilinx 9500 series CPLD and does it fry the moment you stick the USB device in? I then highly doubt it is power supply transients. It's far more likely a ESD problem.

In...
Forum: Amiga scene 16 April 2021, 11:43
Replies: 670
Views: 125,933
Posted By Mathesar
Me! https://www.youtube.com/user/krzych82

Me!
https://www.youtube.com/user/krzych82
Forum: Hardware mods 16 April 2021, 08:19
Replies: 105
Views: 22,797
Posted By Mathesar
You mean the phaae/timing of the e clock relative...

You mean the phaae/timing of the e clock relative to the 7mhz cpu clock? Will have to check. The vma timing looks great, going low when e is low and then staying low when e goes high again. Only when...
Forum: Hardware mods 15 April 2021, 21:59
Replies: 105
Views: 22,797
Posted By Mathesar
Quick update, i have assembled the board without...

Quick update, i have assembled the board without the fast ram to test the cpu/clock doubler.
Unfortuntely it doesn't work properly yet. AS/DTACK and E/VPA/VMA timing looks great but somehow the boot...
Forum: Amiga scene 14 April 2021, 10:37
Replies: 670
Views: 125,933
Posted By Mathesar
Agreed, they look great. :great But I can...

Agreed, they look great. :great

But I can understand that they are killing you.

One can really see all the efforts that go in it.
Forum: Amiga scene 09 April 2021, 18:57
Replies: 7
Views: 470
Posted By Mathesar
A Blizzard 1230IV in an e-waste bin..... :shocked...

A Blizzard 1230IV in an e-waste bin..... :shocked
That card is a beauty, and it even has the FPU installed :D.
Forum: support.Hardware 07 April 2021, 18:24
Replies: 10
Views: 453
Posted By Mathesar
I also always do a readback verify and I too have...

I also always do a readback verify and I too have a high failure rate nowadays.
Floppies are getting old it seems. Interestingly I seem to have more success using HD floppies used as DD floppies.
Forum: support.Hardware 07 April 2021, 18:20
Replies: 19
Views: 1,308
Posted By Mathesar
Keep that card! It is the best A1200 accelerator...

Keep that card! It is the best A1200 accelerator ever build imho.
Forum: New to Emulation or Amiga scene 07 April 2021, 08:47
Replies: 52
Views: 4,638
Posted By Mathesar
Do I see a Ducky keyboard there? With the...

Do I see a Ducky keyboard there? With the two-tone beige "Amiga" key colors??? :D
Forum: Hardware mods 05 April 2021, 08:01
Replies: 105
Views: 22,797
Posted By Mathesar
A little update with some good and some bad news....

A little update with some good and some bad news.

The PCB's I ordered are in and they look good. They also fit quite nicely. There will be no need for a relocator board and the metal shield will...
Forum: support.Hardware 03 April 2021, 07:04
Replies: 5
Views: 317
Posted By Mathesar
I noticed nobody answered your question. Maybe...

I noticed nobody answered your question.
Maybe I can help you a bit. Firstly, to use HDtoolbox you must set the device in the tooltypes to your sd2parallel device (dunno what it is called), by...
Forum: Hardware mods 01 April 2021, 12:44
Replies: 105
Views: 22,797
Posted By Mathesar
The design as you built it works fine as you use...

The design as you built it works fine as you use it now and probably also when you put a clock doubler in front of it. However, the 14MHz can't really benefit from it as the DTACK is still generated...
Forum: Hardware mods 31 March 2021, 20:54
Replies: 105
Views: 22,797
Posted By Mathesar
Nice RAM/IDE board! What design(s) is it based...

Nice RAM/IDE board! What design(s) is it based on? Or is it your own? There is not a lot of logic on that board... I needed 3 7400 IC's just to do the RAM part. Although in my case I can't use the...
Forum: support.Hardware 26 March 2021, 13:43
Replies: 31
Views: 4,326
Posted By Mathesar
Latest release of this firmware 71412 EDIT:...

Latest release of this firmware
71412
EDIT: this is the version from 2014 which I posted here as the files are no longer to be found on minimig.net.
Forum: Hardware mods 25 March 2021, 19:46
Replies: 105
Views: 22,797
Posted By Mathesar
The problem is that the 1MB is not a cache. It...

The problem is that the 1MB is not a cache. It would be classified by the OS as slow ram and given a lower priority than any zorro II/III fast ram. It would thus never be used until your 4MB is full....
Forum: Hardware mods 25 March 2021, 19:41
Replies: 105
Views: 22,797
Posted By Mathesar
If the logic on the ram board would keep up then,...

If the logic on the ram board would keep up then, yes, that could work.
Forum: Hardware mods 25 March 2021, 17:34
Replies: 105
Views: 22,797
Posted By Mathesar
The board I designed could also be build without...

The board I designed could also be build without the fast ram. It's just a matter of leaving some components out and making 2 jumpers.

But you know what I'm going to say..;)
Without fast ram that...
Forum: Hardware mods 25 March 2021, 08:34
Replies: 105
Views: 22,797
Posted By Mathesar
If it works I will post all design files here for...

If it works I will post all design files here for everyone to build.
Forum: Hardware mods 24 March 2021, 16:48
Replies: 105
Views: 22,797
Posted By Mathesar
Maybe, yes. One of the nice things about this...

Maybe, yes. One of the nice things about this (and the original design) is the simplicity of the design. Adding 1Mb @$C00000 was easy as I only needed 3 extra logic IC's. There is room at that...
Forum: Hardware mods 21 March 2021, 20:11
Replies: 65
Views: 4,905
Posted By Mathesar
What will the microcontroller do? The cortex M7...

What will the microcontroller do? The cortex M7 core in these things is many times more powerful than a MC68060 or a Vampire.
It feels a bit "wrong" to have a support controller that is more...
Forum: Hardware mods 21 March 2021, 07:58
Replies: 24
Views: 3,427
Posted By Mathesar
Very nice clean design! The PCB design looks...

Very nice clean design! The PCB design looks "right" to me :great.
I am a fan of simple designs! The idea of putting the fast ram @ $C00000 is a good one. I am trying to fix the 14MHz accelerator...
Forum: Amiga scene 19 March 2021, 19:48
Replies: 670
Views: 125,933
Posted By Mathesar
Cool! :great

Cool! :great
Forum: Hardware mods 19 March 2021, 10:15
Replies: 161
Views: 23,352
Posted By Mathesar
Do we need the commodore docs schematics? We know...

Do we need the commodore docs schematics? We know exactly what is inside Agnus right?
Just a bunch of counters / adders and some multiplexers. Copper is easy, Blitter is a bit more complicated. ...
Forum: Amiga scene 19 March 2021, 08:49
Replies: 670
Views: 125,933
Posted By Mathesar
The silence is deafening... :) That is either...

The silence is deafening... :)
That is either good news (the next update is gonna be big) or bad news..


Still checking every day ;)
Forum: Hardware mods 18 March 2021, 20:22
Replies: 105
Views: 22,797
Posted By Mathesar
attempt to fix it

I like this accelerator a lot. The fact that it uses no programmable logic but just 7400 logic makes it easy to build for everyone.
As the current implementation has some issues I went back Livio's...
Forum: Hardware mods 15 March 2021, 09:19
Replies: 65
Views: 4,905
Posted By Mathesar
I have been thinking about something like this as...

I have been thinking about something like this as well.
Sort of how an Amiga 600 should have been.
What I came up with:
- IDE interface (or another HDD solution, this is a real must)
- 32 bit...
Forum: support.Hardware 14 March 2021, 13:25
Replies: 48
Views: 5,128
Posted By Mathesar
Good tip, had a quick look on ebay and there seem...

Good tip, had a quick look on ebay and there seem to be plenty available.
Will give it a try!
Forum: support.Hardware 14 March 2021, 13:23
Replies: 48
Views: 5,128
Posted By Mathesar
1) I don't know whether that library is the best....

1) I don't know whether that library is the best. The latest P5 library from Aminet does work with an 68LC060 though. I am using Thor's MMUlib package which also works (remember to install both the...
Forum: Amiga scene 11 March 2021, 08:36
Replies: 54
Views: 3,587
Posted By Mathesar
I went from A500 to 1200 to 3000. The 1200 went...

I went from A500 to 1200 to 3000. The 1200 went through a lot of expansions when I had it. At first a Blizzard1230/IV and later a BlizzardPPC 040/25.
The 040/25 felt slower in everyday use to the...
Forum: Amiga scene 10 March 2021, 21:24
Replies: 54
Views: 3,587
Posted By Mathesar
This! Back in the day, when the Amiga was my main...

This! Back in the day, when the Amiga was my main computer a 68060 made perfect sense. It was also the pinnacle of Amiga computing. Afaik, no other platform used the 68060 extensively.
Forum: Amiga scene 07 March 2021, 18:03
Replies: 670
Views: 125,933
Posted By Mathesar
Still checking every day...

Still checking every day...
Forum: Amiga scene 02 March 2021, 21:50
Replies: 46
Views: 2,235
Posted By Mathesar
This as well. How could I forget? Volume and...

This as well. How could I forget? Volume and drive names on Amiga are so much more convenient than Windows drive letters or the terrible /dev or /media or /whatever depending on the current mood of...
Forum: Amiga scene 02 March 2021, 14:41
Replies: 191
Views: 6,744
Posted By Mathesar
I voted "They should support accelerators in all...

I voted "They should support accelerators in all their prods" by accident but I actually meant to vote "They should only target stock Amigas, let the WHD team fix the gltiches".

Like I wrote...
Forum: Amiga scene 25 February 2021, 13:18
Replies: 46
Views: 2,235
Posted By Mathesar
- multiple screens - RAM disk - save/use...

- multiple screens
- RAM disk
- save/use option on new settings
- assigns

Although the latter is something of a double edged sword. Some programs that were "HD installable" insisted of putting...
Forum: Amiga scene 23 February 2021, 16:03
Replies: 186
Views: 12,334
Posted By Mathesar
Don't start!!!!! The A1200 with Blizzard PPC...

Don't start!!!!!

The A1200 with Blizzard PPC / Bvision I once had ran Quake pretty smooth actually. (Once you installed the correct drivers, put some extra fans on it, upgraded the power supply,...
Showing results 1 to 40 of 375

 
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