macsonny Posted December 11, 2023 Share Posted December 11, 2023 Hi All, A bit of an odd question. What 10 digits do you enter when running the 2-hour burn in test under the Apple 1050 Diagnostics software? Have you got an example of a working serial number? Thanks Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted December 11, 2023 Share Posted December 11, 2023 I don't think it matters. Its just used when printing out the test results as the information is written to each track where an error occurs. The FSM says to disconnect the drive from the SIO line once the test begins. Quote Link to comment Share on other sites More sharing options...
Beeblebrox Posted December 12, 2023 Share Posted December 12, 2023 4 hours ago, kheller2 said: The FSM says to disconnect the drive from the SIO line once the test begins. I understood pulling the SIO cable (or plugging it in) with the drive on is a big no no, which will more or less result in damage to the driver's chips and also possibly the Atari SIO circuit!! Unless the SIO circuit had a diode mod in place. Quote Link to comment Share on other sites More sharing options...
macsonny Posted December 12, 2023 Author Share Posted December 12, 2023 29 minutes ago, Beeblebrox said: I understood pulling the SIO cable (or plugging it in) with the drive on is a big no no, which will more or less result in damage to the driver's chips and also possibly the Atari SIO circuit!! Unless the SIO circuit had a diode mod in place. That's what I figured too. Can't be good for the electronics pulling the cable out? Quote Link to comment Share on other sites More sharing options...
Beeblebrox Posted December 12, 2023 Share Posted December 12, 2023 8 minutes ago, macsonny said: That's what I figured too. Can't be good for the electronics pulling the cable out? I've fried a 1050 driver's chips before doing so. Atari should have popped some voltage protection in the drive's SIO circuitry. AFAIK some people add a diode to the A8's SIO circuit to prevent such damage. Quote Link to comment Share on other sites More sharing options...
TGB1718 Posted December 12, 2023 Share Posted December 12, 2023 Must admit, when I've designed any circuits that connect "expensive custom chips", I always use cheap buffer chips to the connectors (socketed of course), I know it adds expense, but at the design stage, it's only pennies on the end cost. 2 Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted December 12, 2023 Share Posted December 12, 2023 Someone electrically explain this to me. Removing the SIO cable, when not in use, even though it's providing +5v to the 1050, causes damage how? Granted the 3086 is always fun when it goes. I can certainly see plugging it in when the power is on being bad. Quote Link to comment Share on other sites More sharing options...
Beeblebrox Posted December 12, 2023 Share Posted December 12, 2023 53 minutes ago, kheller2 said: Someone electrically explain this to me. Removing the SIO cable, when not in use, even though it's providing +5v to the 1050, causes damage how? Granted the 3086 is always fun when it goes. I can certainly see plugging it in when the power is on being bad. I've thought this. However, certainly when I've tried to remove SIO plugs from SIO ports, owing to the often tight fit, you are wiggling them from side to side. There is presumably a chance when doing so that it could be connecting and disconnecting the 5v whilst on. Bottom line, given in stock drives and a8s there are is no voltage protection, it's not worth the risk. I've certainly damaged a 1050 drive whilst at least connecting a drive whilst systems were on. Learnt my lesson. 1 Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted December 12, 2023 Share Posted December 12, 2023 Then power off the computer first. Quote Link to comment Share on other sites More sharing options...
Beeblebrox Posted December 12, 2023 Share Posted December 12, 2023 Well absolutely, I agree, but the reason we are taking about this in this thread is unplugging the SIO whilst a software test is running on the A8, so you can't power off the computer .. unless I've misunderstood what the test in question is. (I assumed it was a diagnostic software run on the A8). Anyways, like I say I have fried a 1050 before by accident so will always ensure I have both the computer and drive powered off before plugging or unplugging the SIO. Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted December 12, 2023 Share Posted December 12, 2023 The two hour burn in test is controlled by the 1050 ROM itself. Errors are written to specific sectors on the disk that can later be read with the 1050 Diagnostic software. The computer is not needed once the 1050 is in that mode. 3 Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted January 17 Share Posted January 17 use a switchable SIOctopus turn that device port off 1 Quote Link to comment Share on other sites More sharing options...
stushug Posted January 17 Share Posted January 17 (edited) 2 hours ago, _The Doctor__ said: use a switchable SIOctopus turn that device port off I tried to look up SIOctopus. All that I found were articles about real octopi! Just what is a SIOctopus? Edited January 17 by stushug Quote Link to comment Share on other sites More sharing options...
_The Doctor__ Posted January 18 Share Posted January 18 SIO hubs with port switches Quote Link to comment Share on other sites More sharing options...
+kheller2 Posted January 18 Share Posted January 18 Just turn the computer off. Pull SIO cable. Or have a long lunch. Quote Link to comment Share on other sites More sharing options...
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