Calab Posted March 1, 2022 Share Posted March 1, 2022 Hey all! I have an UltraSatan v1.1 that is not detected by any Atari ST that I connect it to. It has been working fine since 2017. What happens: - Running the configuration software just lists 0 through 7 and then reports that the US was not found. - Using the same power/cables/SD I can access a different UltraSatan without issues. - When powered up the LEDs for each slot blink, as expected - When an SD card is inserted, the LED blinks, as expected What I've tried: - Tested on multiple Atari ST's - Swapped out cables, SD card and power supply - Shorting out J2 to boot from the base firmware - Swapped out the coin battery - Reflow solder on the IDC connector pins on the US So, at this point I'm looking at an interface issue on the US itself... A buffer chip or something similar. I would like to get debug data from the UART port, but I don't have a pinout for J1, which is where the UART and JTAG connection should be, but I could be wrong. Does anyone have the pinout for the UltraSatan connectors? Any suggestions on where I should start troubleshooting? Quote Link to comment Share on other sites More sharing options...
ben42 Posted March 4, 2022 Share Posted March 4, 2022 If you're looking for UltraSatan connectors pinout, you may want to look at the following resources: UltraSatan board definition (schematic and eagle files) is available at the end of http://joo.kie.sk/?page_id=255 page. Look for "UltraSatan hardware (2009-12-09)" Quote Link to comment Share on other sites More sharing options...
Calab Posted March 5, 2022 Author Share Posted March 5, 2022 On 3/4/2022 at 2:29 AM, ben42 said: If you're looking for UltraSatan connectors pinout, you may want to look at the following resources: UltraSatan board definition (schematic and eagle files) is available at the end of http://joo.kie.sk/?page_id=255 page. Look for "UltraSatan hardware (2009-12-09)" I've been looking at these, but they don't match the board that was purchased from @lotharek. I'm working on a v1.1 board which closely resembles my own working v1.2 board. Quote Link to comment Share on other sites More sharing options...
Calab Posted March 5, 2022 Author Share Posted March 5, 2022 A small update... I just noticed that when I have the dead US connected to me STe and powered on, my floppy drive does not work. If I power off the US, the floppy works fine. Quote Link to comment Share on other sites More sharing options...
TGB1718 Posted March 5, 2022 Share Posted March 5, 2022 Both use the DMA chip, so sounds like there's a faulty signal or data line in the faulty US Quote Link to comment Share on other sites More sharing options...
Calab Posted March 5, 2022 Author Share Posted March 5, 2022 1 hour ago, Calab said: A small update... I just noticed that when I have the dead US connected to me STe and powered on, my floppy drive does not work. If I power off the US, the floppy works fine. ...and, now the floppy drive works find with the powered up US with no changes. Just a stroke of bad luck I guess. It would have been a lot easier to troubleshoot if it was a faulty data line. Quote Link to comment Share on other sites More sharing options...
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