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Forum: Hardware mods Yesterday, 10:33
Replies: 232
Views: 54,190
Posted By Mathesar
Yes.

Yes.
Forum: support.Hardware Yesterday, 09:34
Replies: 26
Views: 3,868
Posted By Mathesar
Hi SpeedGeek, Interesting mods! I was having...

Hi SpeedGeek,

Interesting mods! I was having stability problems with my A3660 as well and the +3.3V stability issue was one of the first things I needed to fix.
In the end I solved it by...
Forum: Hardware mods 24 November 2022, 22:41
Replies: 232
Views: 54,190
Posted By Mathesar
I see. The fatter pins can damage your socket and...

I see. The fatter pins can damage your socket and are not meant to put in a socket. Have you already soldered them down? I think it is very hard to desolder and correct it.
Forum: Hardware mods 24 November 2022, 22:19
Replies: 232
Views: 54,190
Posted By Mathesar
Did you ever got furher with this? I was looking...

Did you ever got furher with this? I was looking at your trace captures again and I saw one weird thing: All your traces are read cycles as R/_W is high. If i understand correctly, buster should set...
Forum: Hardware mods 24 November 2022, 21:01
Replies: 232
Views: 54,190
Posted By Mathesar
Yes, rev 2.2 is the latest version, you won't...

Yes, rev 2.2 is the latest version, you won't have to patch anything.
What do you mean exactly by pins the wrong way around? Did you solder the thin pins on the accelerator board? (so that the...
Forum: Hardware mods 22 November 2022, 22:17
Replies: 40
Views: 1,470
Posted By Mathesar
Thanks! That is of great help. Nice black...

Thanks! That is of great help. Nice black accelerator! It looks pretty crowded and to me it seems the usual "cpu relocator" design will not clear the rgb2hdmi board. I now also know why you don't...
Forum: Hardware mods 22 November 2022, 21:06
Replies: 40
Views: 1,470
Posted By Mathesar
Yes, it is cool but I think you need something...

Yes, it is cool but I think you need something more like this:
https://www.thingiverse.com/thing:4830638
Question: Since you have rgb2hdmi installed could you make a picture of your motherboard? Or...
Forum: Hardware mods 21 November 2022, 20:48
Replies: 40
Views: 1,470
Posted By Mathesar
Stacking beneath the 14MHz accelerator makes the...

Stacking beneath the 14MHz accelerator makes the stack too high, even with 1.2. Technically it works fine though.
edit1:
Now that I think about it, in hindsight, I could have made a "CPU relocator"...
Forum: Hardware mods 21 November 2022, 20:39
Replies: 40
Views: 1,470
Posted By Mathesar
Not at the moment, I haven't gotten around to...

Not at the moment, I haven't gotten around to adding a BOM. I can supply you a rev 1.1 PCB if you want. The patch to make it work is really simple.
Please note however that with rev 1.1 the shield...
Forum: Hardware mods 21 November 2022, 13:47
Replies: 40
Views: 1,470
Posted By Mathesar
Oops! Yes :laughing

Oops! Yes :laughing
Forum: Amiga scene 21 November 2022, 13:34
Replies: 597
Views: 126,024
Posted By Mathesar
The network driver is of course on my list :-)...

The network driver is of course on my list :-) However, other programs seem very happy with it. Another error I see often is #80000003 on the input task of input.device. Probably all just random and...
Forum: Hardware mods 21 November 2022, 12:24
Replies: 40
Views: 1,470
Posted By Mathesar
Looking good! I'll post my thoughts here for...

Looking good!
I'll post my thoughts here for you to edit, I do not want to mess up your document:


Do we need some support for multiple SPI modes (clock phase / polarity)? Most devices work...
Forum: Hardware mods 21 November 2022, 12:16
Replies: 40
Views: 1,470
Posted By Mathesar
Yes, SPI communications can be very tricky, look...

Yes, SPI communications can be very tricky, look for example here: https://github.com/Mathesar/a500-simple-spi-drivers/blob/fa0e8f29561baff2b1e2b68acf0cefd79734cdf4/sspi-sd/sd.c#L192.
To properly...
Forum: Hardware mods 21 November 2022, 12:12
Replies: 40
Views: 1,470
Posted By Mathesar
I think we need both; a quick, synchronous way to...

I think we need both; a quick, synchronous way to read/write a few bytes and, for more advanced hardware involving DMA an asynchronous way for bulk transfer. An SD card driver would actually use both...
Forum: Hardware mods 20 November 2022, 19:45
Replies: 40
Views: 1,470
Posted By Mathesar
First thing to determine is what this shared SPI...

First thing to determine is what this shared SPI thingy should be, a device? a resource? a library?
Personally I think the overhead of a device may be too large.
Just look at the SD or ENC28J60...
Forum: Amiga scene 20 November 2022, 16:20
Replies: 597
Views: 126,024
Posted By Mathesar
Not here sadly :(. In an attempt to find the...

Not here sadly :(. In an attempt to find the culprit I deleted s:imp3.prefs several times. After I had done that IMP3 will ask for a screenmode. Sometimes that works but then IMP3 will open a 2-color...
Forum: Hardware mods 20 November 2022, 16:14
Replies: 40
Views: 1,470
Posted By Mathesar
We talked about this before right? ;) I would...

We talked about this before right? ;) I would love something like this. For me, as a hardware developer I would only have to build a "spi.device" or something and then everything would work. We could...
Forum: Hardware mods 20 November 2022, 16:08
Replies: 40
Views: 1,470
Posted By Mathesar
3D printing! I got inspired by this one: ...

3D printing! I got inspired by this one:
https://www.thingiverse.com/thing:4830638. That one looks a bit "boxy", but imagine it with a GVP HD8+ design but then a bit smaller...
We don't need to...
Forum: Hardware mods 20 November 2022, 09:42
Replies: 40
Views: 1,470
Posted By Mathesar
A design by Matze so should be good! No need for...

A design by Matze so should be good! No need for a new design then.

Maybe the next project for me is to combine the 14MHz accelerator and the SPI controller in an nice external GVP HD8+ like...
Forum: Amiga scene 19 November 2022, 20:47
Replies: 597
Views: 126,024
Posted By Mathesar
Hi Juen, First of all, IMP3 is really great!...

Hi Juen,

First of all, IMP3 is really great! It was one of my test applications during development of the simple SPI ethernet controller. I have been doing multiple 100MB speed tests to test the...
Forum: Hardware mods 19 November 2022, 09:08
Replies: 40
Views: 1,470
Posted By Mathesar
The goal with this design was to make it as...

The goal with this design was to make it as simple as possible, just like the 14MHz accelerator I posted before.

It wouldn't be too hard too make a Zorro-II version but then I would probably use...
Forum: Hardware mods 18 November 2022, 20:19
Replies: 40
Views: 1,470
Posted By Mathesar
Thanks! But most of the work was actually in the...

Thanks! But most of the work was actually in the software. Luckily I had some great examples ;)
Forum: Coders. System 18 November 2022, 15:04
Replies: 21
Views: 3,284
Posted By Mathesar
I have released the design and started a new...

I have released the design and started a new thread here: Open source A500 simple SPI controller (http://eab.abime.net/showthread.php?t=112504).

Thanks everyone for their help :great
Forum: Hardware mods 18 November 2022, 14:59
Replies: 40
Views: 1,470
Posted By Mathesar
Open source A500 simple SPI controller

I have been working on this idea for a very simple SPI controller for the Amiga 500 and I am pleased to announce that it is ready for release! :cool

Called the "A500 simple SPI controller", this...
Forum: Amiga scene 01 November 2022, 10:25
Replies: 1,412
Views: 318,086
Posted By Mathesar
I also have a clause in my contract that excludes...

I also have a clause in my contract that excludes me from having any commercial side business. It is not that uncommon.
But indeed it is good news to hear that the game will continue to be...
Forum: Amiga scene 31 October 2022, 19:05
Replies: 1,412
Views: 318,086
Posted By Mathesar
Or "solo" as in no obligations to the community...

Or "solo" as in no obligations to the community and fellow developers. Maybe Dread became too much like work and he prefers Dread to be a hobby project.
I know I would think like that ;)
Forum: Coders. System 06 October 2022, 21:18
Replies: 21
Views: 3,284
Posted By Mathesar
Most of the hard work was done by Mike and Niklas...

Most of the hard work was done by Mike and Niklas who's code I'm using.
My drivers are basically their drivers adapted to work on a shared SPI bus.
Yesterday I installed AmiTCP and at first got...
Forum: Coders. System 05 October 2022, 09:52
Replies: 21
Views: 3,284
Posted By Mathesar
Yes, I will do that. Everything will be released...

Yes, I will do that. Everything will be released as open-source when it's reasonably done.
It's fun to see a more or less standard A500 connected to the internet. It's slow as hell though. When...
Forum: Coders. System 03 October 2022, 21:22
Replies: 21
Views: 3,284
Posted By Mathesar
Another update, progress was slow but steady. The...

Another update, progress was slow but steady. The last update was that the issue with the SD card driver was on my side :sleep That has been fixed now and the SD card works 100%. I also created a...
Forum: Hardware mods 28 September 2022, 09:50
Replies: 268
Views: 25,978
Posted By Mathesar
Yes! That would mimic the output of a real Paula...

Yes! That would mimic the output of a real Paula quite well and be easy to implement. You'd still have to find a way to implement the volume control though as discussed while I was sleeping :laughing...
Forum: Hardware mods 27 September 2022, 22:32
Replies: 268
Views: 25,978
Posted By Mathesar
Thinking about it, as you cannot support a full...

Thinking about it, as you cannot support a full external DAC you could gain a few bits by having each channel drive a pin using 3 levels: 1,0 and tristate. A resistor would convert this into a simple...
Forum: Hardware mods 27 September 2022, 21:58
Replies: 268
Views: 25,978
Posted By Mathesar
Bruce did some measurements here:...

Bruce did some measurements here: https://eab.abime.net/showpost.php?p=1460641&postcount=211
Paula can source or sink current depending on the sign of the input signal. So, then Paula would only...
Forum: Hardware mods 27 September 2022, 21:25
Replies: 268
Views: 25,978
Posted By Mathesar
Hmm, Now that I read your post back I think I...

Hmm, Now that I read your post back I think I know what you mean. You are using an OR port to mix the carry-out's together? Yes, then it't wont divide down further but you also won't get perfect...
Forum: Hardware mods 27 September 2022, 16:25
Replies: 268
Views: 25,978
Posted By Mathesar
A delta-sigma modulator will generate a constant...

A delta-sigma modulator will generate a constant output pattern when fed with a DC "voltage". This output pattern is heard as an idle tone.
For example, in the case of an 8bit delta-sigma modulator...
Forum: Hardware mods 27 September 2022, 07:50
Replies: 268
Views: 25,978
Posted By Mathesar
I know what PDM is, one could also call it "1st...

I know what PDM is, one could also call it "1st order delta sigma". In fact, it is what the Minimig uses and in the early versions it was not without problems. It is sensitive to idle tones which was...
Forum: Hardware mods 26 September 2022, 22:45
Replies: 268
Views: 25,978
Posted By Mathesar
I know that the volume control is PWM'ed. But...

I know that the volume control is PWM'ed. But what about the 8bit dac's then? Aren't those some r2r or current switching affair?
Forum: Hardware mods 26 September 2022, 22:30
Replies: 268
Views: 25,978
Posted By Mathesar
So now we can't see whether there is a TDA1541 on...

So now we can't see whether there is a TDA1541 on there.. ;)
Forum: Hardware mods 26 September 2022, 19:42
Replies: 232
Views: 54,190
Posted By Mathesar
Looks good to me, make sure all IC's are listed...

Looks good to me, make sure all IC's are listed as SOIC (SMD parts with 0.127mm pitch between the leads)
Forum: Hardware mods 26 September 2022, 19:40
Replies: 232
Views: 54,190
Posted By Mathesar
That's right and normal 68000 behaviour. Once...

That's right and normal 68000 behaviour. Once /DTACK is sampled low in S4 (bus state) the CPU will continue and de-assert /AS at the end of S7. It will not wait for /DTACK to be de-asserted.
Forum: Hardware mods 26 September 2022, 19:11
Replies: 268
Views: 25,978
Posted By Mathesar
What exactly do you mean by this?

What exactly do you mean by this?
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