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General chat about Amiga topics / Premier Сasual Dating - Legitimate Girls
« Last post by perzang on April 30, 2024, 10:22:09 AM »
Break free from traditional dating norms and embrace the best in casual connections.
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2
General chat about Amiga topics / Re: PiSTORM in general
« Last post by F0LLETT on April 30, 2024, 09:30:03 AM »
Quote from: AndyFC on April 26, 2024, 08:38:07 PM
When you add this bit, please can you include setting it to read/write and mounting on the Amiga side? I do this and it allows me to update the version of Emu68 without taking the card out. I'm not in front of my machine right now, but I'm happy to contribute the steps if you want.

Added, hopefully it makes sense and easy to follow.

PS32-Lite amiga.org Wiki
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Amiga Hardware Issues and discussion / Re: VERY Dim video output from Amiga 4000
« Last post by Retronaut on April 30, 2024, 12:45:18 AM »
Thanks Castellen, an update.. I noticed that if I pressed just to the side of the DAC (between it and U211), the image got a little brighter, though it required quite some pressure.

So in case of a dry joint, I reflowed the pins on that side of the DAC and also on U211. Also the jumpers near there, just in case. No change.

Its lat here now, but I'll give your Capacitor info a look tm. It makes sense that if C460c went wonky, then it would modify the brightness. Me and my friend discussed this. But I did not know the expected voltage out of it, and I did not have a method to measure it in circuit so...

I'll try the heating first. Fingers crossed its this, a pretty simple fix if it is!
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Amiga Hardware Issues and discussion / Re: VERY Dim video output from Amiga 4000
« Last post by Castellen on April 29, 2024, 09:32:15 PM »
The too dark image is the result of the analogue levels on the R, G, B outputs being too low, and there's usually three factors involved:
1. Incorrect DAC reference voltage, though you've confirmed this is correct at 1.2V

2. If C460C or C460D has become resistive, which can happen, it will be pulling COMP (DAC pin 40) lower than expected, my service notes (attached) show this typically measures 1.7 - 2.5VDC

3. Some kind of impedance mismatch with your monitor, resulting in the R, G, B levels being excessively low, though that's unlikely given the monitor works correctly with the A500


It's not common for the DAC ICs to just 'go dim'.  They typically either work, or they don't.  And it's rare for these ICs to fail.  I've been repairing Amigas for around 30 years and I don't recall seeing a single DAC failure.

I'd suggest using my notes attached for reference, or compare with another A4000.  Pay attention to the DC level on DAC pin 40 to begin with, try removing C460C (100nF) on the bottom side and see if that makes any difference.  You may also find that heating the ceramic capacitors with hot air can temporarily 'fix' the resistive condition, which usually returns once it cools.

You could also check you have video data on all 24 digital inputs to the DAC, though that doesn't match the fault description.
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Amiga Tutorials / Re: Getting online with PiStorm32, Miami DX and Encrypted WiFi
« Last post by TribbleSmasher on April 29, 2024, 09:28:59 PM »
Quote from: AndyFC on April 28, 2024, 01:07:20 PM
NOTE: I didn't have the Devs:Firmware folder to start with but some of you might)

I can attach the package with the firmware and such, but remind me to remove it once it gets to release state.
This is still considered ALPHA, folks. ;)
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Amiga Hardware Issues and discussion / Re: Amiga 2000 Video & Audio Issues
« Last post by Castellen on April 29, 2024, 09:07:36 PM »
Quote from: TmaxElectronics on April 28, 2024, 10:51:42 PM
But after bending all pins straight again the A2000 is back up and running again ^^

I'd suggest replacing the entire PLCC socket unless you're very confident it's perfect.  IC sockets are notorious for causing all sorts of horrible intermittent problems.


Quote from: TmaxElectronics on April 28, 2024, 10:51:42 PM
Any suggestions on other things I could do? :)

Depends what you want to do long term.  There are plenty of interesting options in terms of the PiStorm and Vampire expansions.
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Amiga Gaming / Re: Question About Train Driver 3, How To Do Demo Version-Full Version?
« Last post by Sugo77 on April 29, 2024, 05:23:02 PM »
My New Records(First Run Driving Train)(29.04.2024):
Train Driver Simulator 3, Full Version, Route - Wolves&oxley, Loco 87 Lord Nelson, My Record Station 2 Milton Keynes, 1, 5(29.04.2024):
https://forum.amiga.org/index.php?action=dlattach;topic=76470.0;attach=3406;image
Train Driver Simulator 3, Full Version, Route - Wolves&oxley, Loco 87 Lord Nelson, My Record Station 2 Milton Keynes, 2, 6(29.04.2024):
https://forum.amiga.org/index.php?action=dlattach;topic=76470.0;attach=3408;image

This was very hard experiences od driving trains, but and very interesting... My driver % 11 - not enough yet for Drive to Station 3, but anyway this was good first runs with adventures on ways, and now anyway i senese better drive of trains...
Skills up!...

Updated\Added Latter:
I added my favorite map\route from Train Driver 3 Simulator From Demo Version, Route Name: re-ka-fds, this reaminds me Season Autumn, with Weather Leaf Autumn!
But, now i can drive trains more than 10 Miles in my favorite map in Full Version of this game train Driver 3, i happy!
Train Driver Simulator 3, Full Version, Route -re_ka-fds, Loco 06209 Princess Beatrice, Weather Leaf Autumn , 1, 8(29.04.2024):
https://forum.amiga.org/index.php?action=dlattach;topic=76470.0;attach=3410;image
Train Driver Simulator 3, Full Version, Route -re_ka-fds, Loco 06209 Princess Beatrice, Weather Leaf Autumn , 2, 9(29.04.2024):
https://forum.amiga.org/index.php?action=dlattach;topic=76470.0;attach=3412;image
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Amiga Tutorials / Re: Basics for Setting up Firebird (Prometheus) A4000 3000 Daughterboard
« Last post by Boing-ball on April 29, 2024, 03:59:04 PM »
Will Now be keeping this updated over here just in-case:

https://www.amibay.com/threads/basic-guide-on-setting-up-a-prometheus-firebird-daughterboard-on-a3000-and-a4000-now-here-on-amibay.2446084/

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Amiga Hardware Issues and discussion / Re: VERY Dim video output from Amiga 4000
« Last post by Retronaut on April 29, 2024, 03:24:43 PM »
I think I might be able to manage the DAC replacement, though there are some things I need to find out first.

TBH, though it would be nice to practice it on a similar chip on a broken board. Does anyone have a similar board, junk that they could send me (id pay postage)

In other news

So I and a friend (electronics hobbyist) had a pour over the schematics, and the DACs spec sheet and here is what was found.
  • The DAC requires a 5v supply to work, I measured this and its 4.84v, so it seems fine.
  • The DAC requires a reference 1.2V supply, which comes from a near-by chip, I measured this, and its 1.23V, so it appears fine.
  • The DAC has a compensation signal, and thats supplied by (I assume) a 580ohm resistor, so I guess if that was failing it would cause issue. Measured resistor, seems ok.
  • The chip has 3 pins for RGB, I measured these and they are 5mV when the machine is booting (black screen) and then jumps to 30mV when displaying Workbench.

The 30mV value is the exact same as the pins on the DB23 monitor socket. So its clear there is no issue between the DAC and the socket.
(later I will measure the same outputs on my Amiga 500, to check 30mV is not correct)

It also appears the DAC is getting all the right inputs as well.
So it appears that the DAC is getting the correct digital signals in, but it is not then multiplying these values out, to the correct voltages?

So, what do you guys think? To me now it could be 2 things.
  • Dry solder joint on DAC somewhere, causing odd behaviour.
  • The DAC is dying.

Some things I could try
  • Heating the DAC, in isolation, to see if its possible a chip failure. I understand warming chips up can sometimes temp fix issues. Showing it IS the chip on its way out
  • Re-flow the pins for the DAC, its possible a dry solder joint is causing this.
  • Replace the DAC :/
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Amiga Gaming / Re: Question About Train Driver 3, How To Do Demo Version-Full Version?
« Last post by Boing-ball on April 29, 2024, 01:57:39 PM »
Quote from: Sugo77 on April 28, 2024, 08:09:43 PM
Got, installed, tested, allf ine, thanks you!
This hard, but very interesting Trains Simulator Videogame, i even thhink this game Parents of all modern Trains Simulators!
Promised results in screenshots:
Screenshot №1:
https://forum.amiga.org/index.php?action=dlattach;topic=76470.0;attach=3402;image
Train Driver Simulator 3, Full Version, Route - Wolves&oxley, Loco 87 Lord Nelson, Speed 100 Mph, Miles 12, 3(28.04.2024)
Screenshot №2:
https://forum.amiga.org/index.php?action=dlattach;topic=76470.0;attach=3404;image
Train Driver Simulator 3, Full Version, Route - Wolves&oxley, Loco 87 Lord Nelson,Train Derailed, 4(28.04.2024)
P.S.:
This fakin verry hard, but very interesting game, also have many elements of random, when you are long drive trains on long distances, ahahahaha Bull shet, i was use many bad words, when was try drive trains from one stantions to next stantions and game always was interrupt and do random traps\limits for i lose, ahahahaha
This was very fun, lol

Looks good. Glad you have found the full version. 👍🏻
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