Atari NUC Question

[Jfcatari]

Thanks to all for the creation and support for the Atari NUC.  I just finished my build and everything is testing out well.  There is one item that I came across.  I am flashed with TKII power ON software (not the standard).  I have fujinets, sdrive II, and sdrive maxes connected up to the NUC using the 15 to SIO adapter from Brewing Academy.

 

The issue seems to be with any writes to the SIO devices, they just timeout and do nothing.  For example, I can format a new blank floppy on the sdrive and I can't reconfigure the fujinet to a new access point because it can't write the config.  All of these same devices work on an 800 XL Remake.

 

Any ideas what to look for?

 

[Jfcatari]

I did some more testing...I pulled out my trusty 1050 and hooked it up to the NUC.

She booted up just fine using the 15 pin to SIO to the NUC.  I formatted a disk with it in DOS 2.5 and was able to write DOS to the new disk and was able to boot with it with no issues.

 

It appears that something is up when using external FLASH devices like the fujinet or the sdrive max connected to the 15 pin to SIO on the NUC.

 

Any thoughts out there?

 

 

I hooked the Fujinet back up to the NUC via the 15 pin to SIO.

Here are the debug logs from the fujinet when I select to read from the SD card which does work on another machine>

 

 

Showing logs:
[17:36:16] 
[17:36:16] CF: 70 f5 00 00 66
[17:36:16] sioFuji::sio_process() called, baud: 19200
[17:36:16] ACK!
[17:36:16] Fuji cmd: CLOSE DIRECTORY
[17:36:16] COMPLETE!
[17:36:16] 
[17:36:16] CF: 70 f9 01 00 6b
[17:36:16] sioFuji::sio_process() called, baud: 19200
[17:36:16] ACK!
[17:36:16] Fuji cmd: MOUNT HOST
[17:36:16] ::mount {1} "SD"
[17:36:16] ::mount_local Attempting mount of "SD"
[17:36:16] Type is already LOCAL
[17:36:16] COMPLETE!
[17:36:16] 
[17:36:16] CF: 70 f7 01 00 69
[17:36:16] sioFuji::sio_process() called, baud: 19200
[17:36:16] ACK!
[17:36:16] Fuji cmd: OPEN DIRECTORY
[17:36:16] <-SIO read 256 bytes
[17:36:16] NAK!
[17:36:16] bus_to_peripheral() - Data Frame Chksum error, calc 70, rcv 00
[17:36:16] ERROR!
[17:36:16] 
[17:36:16] CF: 70 f7 01 00 69
[17:36:16] sioFuji::sio_process() called, baud: 19200
[17:36:16] ACK!
[17:36:16] Fuji cmd: OPEN DIRECTORY
[17:36:16] <-SIO read 256 bytes
[17:36:16] NAK!
[17:36:16] bus_to_peripheral() - Data Frame Chksum error, calc 70, rcv 00
[17:36:16] ERROR!
[17:36:16] 
[17:36:16] CF: 70 f4 00 00 65
[17:36:16] sioFuji::sio_process() called, baud: 19200
[17:36:16] ACK!
[17:36:16] Fuji cmd: READ HOST SLOTS
[17:36:16] ->SIO write 256 bytes
[17:36:16] COMPLETE!
[17:36:17] 
[17:36:17] CF: 70 f2 00 00 63
[17:36:17] sioFuji::sio_process() called, baud: 19200
[17:36:17] ACK!
[17:36:17] Fuji cmd: READ DEVICE SLOTS
[17:36:17] ->SIO write 304 bytes
[17:36:17] COMPLETE!

Edited September 8 by Jfcatari

[Jfcatari]

I built the sdrive for the NUC  (https://ataribits.weebly.com/sdrive.html sdrive daughter board) and I get the same results.

 

I can't write to a Fujinet, Sdrive daughter board, or an SdriveMax.

 

In DOS, I have seen error 139.  What boggles the mind the Atari 1050 works perfectly. 

 

Could I have some type of power issue?  The supply is 12C DC 3 Amps.  Checking around the IC's I see just under 5 V, like 4.9 or so.

 

 

 

 

[tschak909]

I see checksum errors all over that output, your SIO has issues.

[Jfcatari]

10 minutes ago, tschak909 said:

I see checksum errors all over that output, your SIO has issues.

@tschak909

Thanks.

 

Here is the funny thing.  If I connect an Atari 1050 drive to the NUC, I have no issues.  Floppy reads and writes ok.

 

Any ideas where to start debugging?

 

 

[mozzwald]

@Jfcatari have you tried browsing a tnfs server? what does debug output look like trying to open tnfs host?

[Jfcatari]

6 minutes ago, mozzwald said:

@Jfcatari have you tried browsing a tnfs server? what does debug output look like trying to open tnfs host?

 @mozzwald

 

I don't have the logs at the moment, but that also fails too. 

 

I also have issues with Sdrive Max as well..something is up on the SIO, but all reads on the Fujinet and Sdrive work fine.

 

Edited September 9 by Jfcatari

[Jfcatari]

Question for the experts (sorry, I don't have an electronics background):

 

Can a Resistor buss array be tested in circuit?

 

I am rechecking RN1 here in circuit.

 

I have 4.7K between 1 and each set of array, BUT the resistance on 1->DATA IN(5) and 1-> DATA OUT(6) is only showing 2.3K

 

 

Edited September 9 by Jfcatari

[Jfcatari]

Great news!!!  I am happy to report, I found the problem.

 

I purchased this Atari NUC board with the SMT chips installed, but on the 100 Ohm resistor RN2 above there was a TINY bridge between two of the adjacent pins which caused the problems on the DATA IN and OUT lines to the SIO!

 

I now have a fully working Atari NUC with Fujinet, Sdrive MAX, and Sdrive daughter board.

 

 

Thanks to all who have read and commented on my stream of thoughts on finding the root of the problem.

Edited September 10 by Jfcatari

[tschak909]

20 hours ago, Jfcatari said:

Great news!!!  I am happy to report, I found the problem.

 

I purchased this Atari NUC board with the SMT chips installed, but on the 100 Ohm resistor RN2 above there was a TINY bridge between two of the adjacent pins which caused the problems on the DATA IN and OUT lines to the SIO!

 

I now have a fully working Atari NUC with Fujinet, Sdrive MAX, and Sdrive daughter board.

 

 

Thanks to all who have read and commented on my stream of thoughts on finding the root of the problem.

EXCELLENT!

-Thom