English Amiga Board


Go Back   English Amiga Board > Search Forums

Showing results 1 to 40 of 140
Search took 0.02 seconds.
Search: Posts Made By: Mathesar
Forum: Hardware mods 30 September 2018, 10:09
Replies: 443
Views: 75,993
Posted By Mathesar
It is a power led! And good stuff has to have a...

It is a power led! And good stuff has to have a nice shiny power led :cool
Forum: Hardware mods 12 July 2018, 13:39
Replies: 51
Views: 7,286
Posted By Mathesar
I will use this programmer I salvaged from the...

I will use this programmer I salvaged from the garbage bin:

http://www.artbv.eu/support/programmers/up1/index.htm

Works only on Windows XP but it supports a lot of chips :cool
Now I only hope...
Forum: Hardware mods 09 July 2018, 20:54
Replies: 51
Views: 7,286
Posted By Mathesar
Where did you get the "wrong"LEBUS jedec file? ...

Where did you get the "wrong"LEBUS jedec file?
I am planning to use the ones from Chucky's page.
Forum: Amiga scene 28 June 2018, 15:53
Replies: 16
Views: 3,836
Posted By Mathesar
Can we pre-order???? :spin

Can we pre-order???? :spin
Forum: Hardware mods 26 June 2018, 22:57
Replies: 19
Views: 2,218
Posted By Mathesar
About testing; I usually try to open some...

About testing;
I usually try to open some multiple programs in Workbench to fill up the ram.
You could for example load up hippoplayer and load a large modfile to use all the chipram, open diropus,...
Forum: Hardware mods 24 June 2018, 13:48
Replies: 19
Views: 2,218
Posted By Mathesar
Nice board indeed. Are you aware of Pete's...

Nice board indeed.
Are you aware of Pete's open-source version?


See http://eab.abime.net/showthread.php?t=85395
Forum: Hardware mods 15 June 2018, 10:01
Replies: 51
Views: 7,286
Posted By Mathesar
Anyone? Still haven't build mine but as I...

Anyone?


Still haven't build mine but as I will be using it in a 3000 as well I am very interested in TNT32's problem.
Forum: support.Hardware 26 May 2018, 20:36
Replies: 2
Views: 344
Posted By Mathesar
Thanks for the info. I replaced the short with...

Thanks for the info.
I replaced the short with a 120 Ohm resistor to give me 5.25V. Right in the middle of the range. :cool
Forum: support.Hardware 24 May 2018, 22:07
Replies: 2
Views: 344
Posted By Mathesar
Old A500 PSU warning and question about exact voltages

Hi,

My A500 has a 2.5A "heavy" powerbrick. Recently the Amiga randomly rebooted for no reason and was generally unstable. Suspecting a power problem I monitored the +5V using a scope and sure...
Forum: Hardware mods 04 May 2018, 14:41
Replies: 443
Views: 75,993
Posted By Mathesar
Nice machine you have there! :cool

Nice machine you have there! :cool
Forum: Hardware mods 17 March 2018, 09:12
Replies: 244
Views: 20,117
Posted By Mathesar
Thumbs up Cool! :cool I wanted to order a batch myself...

Cool! :cool
I wanted to order a batch myself but the costs of 5 PCB's (which is the minimum order quantity) was keeping me off. Amiga hobbies are expensive enough as they are!

Keep us posted pls!
Forum: Hardware mods 16 March 2018, 21:28
Replies: 244
Views: 20,117
Posted By Mathesar
Beautiful!!!! Do you have any of those...

Beautiful!!!!

Do you have any of those rev1.1 boards for sale? I'm interested!
Forum: Hardware mods 03 March 2018, 21:55
Replies: 146
Views: 15,387
Posted By Mathesar
But then we just redesign the circuit a bit so...

But then we just redesign the circuit a bit so that it does work with only +12V. It is really not difficult to do. The first opamp is already biased at about +2.5V. if replaced by a modern rail to...
Forum: Hardware mods 03 March 2018, 21:34
Replies: 146
Views: 15,387
Posted By Mathesar
You could also build in a 12V/5V stepdown...

You could also build in a 12V/5V stepdown converter and only power the board from +12V. Any external brick or simple industrial frame PSU will then do. As far as I can tell -5V is not used anywhere...
Forum: Hardware mods 03 March 2018, 09:05
Replies: 146
Views: 15,387
Posted By Mathesar
And in KiCad! I am happy already :-)

And in KiCad! I am happy already :-)
Forum: Hardware mods 26 February 2018, 19:58
Replies: 146
Views: 15,387
Posted By Mathesar
Amiga can be a harsh mistress. Amy-ITX will whip...

Amiga can be a harsh mistress. Amy-ITX will whip you in submission to her closed sources. ;)

We could really use an open-source Amiga motherboard using readily available parts.
Forum: Hardware mods 24 February 2018, 14:42
Replies: 244
Views: 20,117
Posted By Mathesar
Have you also considered using KiCad? I find...

Have you also considered using KiCad? I find KiCad easier to work with than Eagle and the 3D viewer is quite handy to see what the final board will look like.

The Altera chips are nice, how are...
Forum: Hardware mods 24 February 2018, 10:05
Replies: 244
Views: 20,117
Posted By Mathesar
Check, I see it as well. Sorry for all the false...

Check, I see it as well. Sorry for all the false alarms. I guess I was not fully awake yet :sleep.

I will also order a batch of PCB's this weekend. My A3000 has been without a 060 for far too long...
Forum: Hardware mods 24 February 2018, 09:48
Replies: 244
Views: 20,117
Posted By Mathesar
Ok, got the inner layers working into viewmate...

Ok, got the inner layers working into viewmate now, the VCC pin of the DS1100Z seems not connected to the power plane (layer 3).

PS my breakfast was at 7:00AM!:p
Forum: Hardware mods 24 February 2018, 09:36
Replies: 244
Views: 20,117
Posted By Mathesar
Many thanks for this :bowdown Can't wait to order...

Many thanks for this :bowdown Can't wait to order and build this :cool

I checked the changes by overlaying the gerber files and found a small error on the top layer near C204, see attached...
Forum: Hardware mods 23 February 2018, 21:16
Replies: 244
Views: 20,117
Posted By Mathesar
Adapter

Drawn up a quick board, I need to clean up the silk but... would anyone be interested in a DS1100Z-25+ to DS1000-25 adapter?
Forum: Amiga scene 23 February 2018, 13:41
Replies: 121
Views: 6,755
Posted By Mathesar
I had/have a CV64. I now run it through the CV64...

I had/have a CV64. I now run it through the CV64 @ 960*540 in doublescan mode. My full-HD monitor picks this up as 1920*1080 so that it gives me a sharp image without any interpolation.

An A3000...
Forum: Amiga scene 22 February 2018, 13:53
Replies: 121
Views: 6,755
Posted By Mathesar
That's my story in reverse :) My towerized...

That's my story in reverse :)

My towerized A1200+BlizzardPPC+Bvision was also really unstable. It was nice to play games like Doom and Quake at good framerates and there were some mandelbrot toys...
Forum: Hardware mods 22 February 2018, 09:42
Replies: 244
Views: 20,117
Posted By Mathesar
Thumbs up Sweet! Is this the A3660 and are you going to...

Sweet! Is this the A3660 and are you going to make it a revision 1.1 then ? :D

I am on the point of ordering A3660 PCB's but I am still contemplating to do the 75F175 / DS1100Z change myself but...
Forum: Hardware mods 21 February 2018, 21:57
Replies: 4,059
Views: 355,609
Posted By Mathesar
A Tetris scope :cool! Long time ago since I last...

A Tetris scope :cool! Long time ago since I last used one. Still a nice instrument :great
Forum: Hardware mods 21 February 2018, 21:20
Replies: 51
Views: 7,286
Posted By Mathesar
060 adapter _clken timing?

In follow up to the discussion here: http://eab.abime.net/showthread.php?t=87971&page=10 about the pclk/bclk/cpu_clk/clk90 timing I am looking at the files provided by Chucky to see if I can modify...
Forum: Hardware mods 20 February 2018, 15:08
Replies: 244
Views: 20,117
Posted By Mathesar
Thumbs up So, no issues there. Nice mod! :D I am...

So, no issues there. Nice mod! :D
I am collecting parts to build one of these cards and will also use the 74F175. It would be nice if we could modify the board to use this chip instead. Also, did...
Forum: Hardware mods 19 February 2018, 21:01
Replies: 244
Views: 20,117
Posted By Mathesar
Yes, but maybe that can be improvedl. I think...

Yes, but maybe that can be improvedl. I think there are two free gates on the 74F04 so we can delay the pclk (040/060 cpu clock) by running it through the 2 free NOT gates.
The extra delay will be...
Forum: Hardware mods 19 February 2018, 15:38
Replies: 244
Views: 20,117
Posted By Mathesar
I also worry about that, it's called skew....

I also worry about that, it's called skew. Apperently it works though. Maybe it isn't such critical after all. There also exist parts like the 74ACT175 which are more modern (being CMOS) and thus...
Forum: Hardware mods 19 February 2018, 13:42
Replies: 244
Views: 20,117
Posted By Mathesar
Yes, Amiga87 Thanks for this!!!!! I am...

Yes, Amiga87 Thanks for this!!!!!
I am collecting parts at the moment and was also thinking about alternative parts for the clock divider. I was mainly worried about the skew and fanout of chips...
Forum: Hardware mods 18 February 2018, 09:28
Replies: 51
Views: 7,286
Posted By Mathesar
Wow, just WOW! Makes me wanna get out my...

Wow, just WOW! Makes me wanna get out my soldering iron.....
Forum: Amiga scene 15 February 2018, 17:08
Replies: 121
Views: 6,755
Posted By Mathesar
Big grin My personal Amiga story started with an A500...

My personal Amiga story started with an A500 which was never expanded beyond the standard extra floppy and 512kb RAM.

Then, when I had more money to spend ,I had an A1200 which I eventually...
Forum: Coders. Asm / Hardware 18 January 2018, 13:16
Replies: 140
Views: 14,694
Posted By Mathesar
Simply amazing! :bowdown About the...

Simply amazing! :bowdown

About the raycaster. All tutorials I have seen state that you need to cast a ray for every horizontal pixel in the projection plane. Which is, in this case, 160 pixels...
Forum: Hardware mods 17 January 2018, 19:56
Replies: 4,059
Views: 355,609
Posted By Mathesar
That would indeed be useful for resetting the SD...

That would indeed be useful for resetting the SD card into SPI mode.
I get it you are low on CPLD space :).

I also think you are right about the low clock speed for the rest of the...
Forum: Hardware mods 17 January 2018, 13:54
Replies: 4,059
Views: 355,609
Posted By Mathesar
I missed that! Going to have a look tonight.

I missed that! Going to have a look tonight.
Forum: Hardware mods 17 January 2018, 10:11
Replies: 4,059
Views: 355,609
Posted By Mathesar
Oops, I meant scsi.device of course :spin. ...

Oops, I meant scsi.device of course :spin.

The a500ide project can be found here:
http://www.mkl211015.altervista.org/ide/a500ide.html

I have an updated version at home which I can post...
Forum: Hardware mods 17 January 2018, 07:39
Replies: 4,059
Views: 355,609
Posted By Mathesar
I understand. It's a nice and straightforward SPI...

I understand. It's a nice and straightforward SPI interface!


I was more thinking about the Amiga driver / filesystem interface part.
The zxmmc code which deals with the SD card needs to be...
Forum: Hardware mods 16 January 2018, 21:49
Replies: 4,059
Views: 355,609
Posted By Mathesar
I had a look at the wiki and everything seems...

I had a look at the wiki and everything seems very clear to me.

A few questions / observations though:



A read from the data register automatically starts a new transfer. I assume you do...
Forum: Hardware mods 09 January 2018, 22:01
Replies: 4,059
Views: 355,609
Posted By Mathesar
I think you are right. I remember from the...

I think you are right. I remember from the Minimig schematics that it even has Autovectoring disabled in hardware because the _AVEC (autovector enable) is wired to VCC (disabled).
The Amiga cheats...
Forum: Hardware mods 09 January 2018, 21:30
Replies: 4,059
Views: 355,609
Posted By Mathesar
Way back in post #816:...

Way back in post #816: http://eab.abime.net/showpost.php?p=1153152&postcount=816 I was working on an A500 gayle compatible IDE controller.
It never worked because the CPLD area of the Cypress PSOC...
Showing results 1 to 40 of 140

 
Forum Jump

All times are GMT +2. The time now is 20:11.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Page generated in 0.08796 seconds with 10 queries