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SDrive-MAX ATX support


Farb

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2 hours ago, _The Doctor__ said:

I would still look at everything, I would verify voltages under load, whatever power supply used to power the machines at the time of the mishap may have over current damage because power was put to them in reverse by-bassing their in built protections

I think I would have experienced serious problems if something really went wrong. I still think I was lucky. I loaded a few games from tapes and that worked. Also games from the sdrive max load ok now. So I don't think there is a problem with the sio connection. Only thing is that the sdrive doesn't work with external power anymore. The problem isn't in the power supply. That is why I asked if it is safe to connect another sdrive to my Atari. If that works there is only a problem with the sdrive.

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58 minutes ago, _The Doctor__ said:

If using another SDrive do not use the same power supplies you used with the possibly bad SDrive.

Ok, I have another one. But with that one there is no difference. The power supply of the Atari is ok you think?

 

A friend of mine doesn't want to connect his sdrive to my Atari. To br honest I think that he is over reacting. There was a risk when the wires were on the wrong place. Since computer and sdrive work fine without external power now I dare to take the risk..

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6 hours ago, madness77 said:

- so you connected an external power supply as the switch (or jumper) was set to supply via SIO? Well...  I may not have good news...
- have you tried powering the Arduino from USB? E.g. from a normal phone charger or from a computer/laptop? Only with the switch set to "external", of course.

You mean the usb connection on the sdrive? I can try that.

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You aren't paying attention, You use a new power supply with a new sdrive max. The hope you are holding out is for the Atari to be fine and a new SDrive max to work properly with it. If you keep using a suspected damaged SDrive Max it may very well damage other things you attached to it at some point. Playing with fire for no reason, You can easily replace the ardy for cheap and program it up.

Edited by _The Doctor__
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4 hours ago, _The Doctor__ said:

You aren't paying attention, You use a new power supply with a new sdrive max. The hope you are holding out is for the Atari to be fine and a new SDrive max to work properly with it. If you keep using a suspected damaged SDrive Max it may very well damage other things you attached to it at some point. Playing with fire for no reason, You can easily replace the ardy for cheap and program it up.

So if I understand correctly there is no harm to connect another sdrive with power supply to my Atari but it is better not to use my current sdrive anymore? I think myself that my current sdrive is only dangerous with the sio switch on external power and use it with external power. In that situation it is acting weird. If I use power from the Atari with switch on other side it works fine. But if it is better to not use this SDrive anymore I will wait for my new one. But in that case I want to know if it is safe to test another sdrive now with other power supply to see if that works fine. If that works I'm a bit more sure that my Atari survived my stupidness. But my friend doesn't want to take the risk to connect his Sdrive to my Atari..

Edited by tajvdz
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9 hours ago, tajvdz said:

You mean the usb connection on the sdrive? I can try that.

The Arduino can be powered in three ways:

- direct 5V to the VIN input (e.g. from the SIO port) (you wrote that this works fine, so it is unlikely there should be a short anywhere on the 5V rail)

- from an external power supply, in which case 5V and 3.3V are created by voltage regulators

- 5V from the USB port

 

You can try this way, without the Atari connected of course.

 

If everything will be OK and the screen will work correctly, this may indicate a fault in the voltage regulators circuitry, admittedly there is a diode there to protect against reversed voltage polarity.

 

Repair of this is certainly beyond your technical skills and the cost of repair in some electronics service will exceed the cost of a new Arduino (~$5), but for any electronics technician such a repair (e.g. replacement of capacitors or burnt regulator) is relatively simple, fast and cheap.

 

If you feel confident enough with a multimeter, you can check with an external power supply what the voltages are on the 5V and 3.3V pins (multimeter set to V, black probe to GND, red to voltage holes).
 

 

image.thumb.png.54a029c7d3cb4c11e176133e851cff12.pngways_to_power_Arduino_480x480.webp.fd8b6358cd97f02ea3f999a5f513695c.webp

 

 

Edited by madness77
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1 hour ago, madness77 said:

The Arduino can be powered in three ways:

- direct 5V to the VIN input (e.g. from the SIO port) (you wrote that this works fine, so it is unlikely there should be a short anywhere on the 5V rail)

- from an external power supply, in which case 5V and 3.3V are created by voltage regulators

- 5V from the USB port

 

You can try this way, without the Atari connected of course.

 

If everything will be OK and the screen will work correctly, this may indicate a fault in the voltage regulators circuitry, admittedly there is a diode there to protect against reversed voltage polarity.

 

Repair of this is certainly beyond your technical skills and the cost of repair in some electronics service will exceed the cost of a new Arduino (~$5), but for any electronics technician such a repair (e.g. replacement of capacitors or burnt regulator) is relatively simple, fast and cheap.

 

If you feel confident enough with a multimeter, you can check with an external power supply what the voltages are on the 5V and 3.3V pins (multimeter set to V, black probe to GND, red to voltage holes).
 

 

image.thumb.png.54a029c7d3cb4c11e176133e851cff12.pngways_to_power_Arduino_480x480.webp.fd8b6358cd97f02ea3f999a5f513695c.webp

 

 

Ok, I can try this but I have a new sdrive max on the way. I can also wait. It works with the sio power now. And now I used it for a day I even think that I will keep using it. I found out a few tricks that make it easier. 

 

But since I don't notice any strange things on my Atari I can say that it was a lucky escape? The new sdrive was on the way anyway..

 

About the screen. With external power it shows the sdrive menu. In the beginning the touch screen works but if power is on longer the touch screen isn't responding anymore. With sio power this problem doesn't exist.

 

And where can I find the technical manual of the 800 XL? I can lr my friend take a look at it..

Edited by tajvdz
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20 hours ago, madness77 said:

Ok thank you. But what do you think are the chances that I damaged my Atari if it is working fine now? And in what area do I have to look to rule things out?

Edited by tajvdz
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On 4/30/2024 at 11:56 AM, tajvdz said:

Ok thank you. But what do you think are the chances that I damaged my Atari if it is working fine now? And in what area do I have to look to rule things out?

image.png.c5ce1e9cde9f6d28b19a06cdda0b168a.png

 

"NEAR..."

 

But, seriously, it's hard to say, I had a "fully working" Atari XE, and that it has some problem, it turned out when I wanted to add a memory expansion to it. Sometimes you add some modification, and it turns out, for example, that the voltage or clock waveform is "ugly" on the oscilloscope and something there does not want to work....

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  • 2 weeks later...
On 5/6/2024 at 12:15 PM, madness77 said:

image.png.c5ce1e9cde9f6d28b19a06cdda0b168a.png

 

"NEAR..."

 

But, seriously, it's hard to say, I had a "fully working" Atari XE, and that it has some problem, it turned out when I wanted to add a memory expansion to it. Sometimes you add some modification, and it turns out, for example, that the voltage or clock waveform is "ugly" on the oscilloscope and something there does not want to work....

Ok, but I didn't make a modification on my 800 xl. I made a bad connection in the sdrive max that i connected to the sio port. The sdrive max gave problems with the external power supply at first but not with sio power. I didn't use my Atari for a few weeks and last week without sdrive max. I didn't notice any problems. When I used my sdrive max with sio power there were no problems at first but later it started to act weird. It didn't boot to the sdrive menu and when it did games didn't boot. When I took the sio connector of and put it back on it started working again. Is it likely that the problem is in the sdrive max or in the computer? Is it better to not use the sdrive max anymore? Or better to not use my Atari at all before I have let it checked out? Is it a risk to connect another device (tape or other sdrive max) to the sio port to see what happens?

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