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BLU (Basic Lisa Utility) compatibility with macOS and USB to Serial adapters

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Lisa2:

--- Quote from: ried on November 27, 2024, 10:15:34 pm ---Can you please share your specific make & model of FTDI-based USB to serial adapter? Which null modem cable (or other DB25 to DE-9 adapters) are you using?

--- End quote ---

The USB adapter I used is a USO9ML2-LS made by B&B Electronics (now Advantech):

https://www.advantech.com/en-us/products/b851dad7-5f2f-46da-926d-6fe3157b34aa/bb-uso9ml2-ls-a/mod_3aa59323-fad3-4a62-bc81-47d4c4ce2511

Note that this adapter has some extra features not required to communicate with Lisa such as isolation and a locked serial number.  It does use FTDI chipset, something I prefer over the prolific adapters.

My cable is exactly as recommended in the BLU manual, Appendix B:

Lisa       Signals     PC
DB25M                DE9F
  2     Tx > Rx        2
  3     Rx < Tx        3
  7         Gnd          5
  6    DSR < RTS     7
 20    DTR > CTS    8

ried:

--- Quote from: AlexTheCat123 on November 28, 2024, 09:11:06 am ---I'm also able to connect with my 2/5s without any issue. I use Serial instead of CoolTerm, and everything works fine (including file transfers), so I'm not sure what's causing your issues there. I'm out of town right now, but I can get you more info on my USB to serial adapter once I get back!

--- End quote ---

Two issues with Serial here:

* When I use Serial to receive an xmodem transfer, it comes to the Mac as a text file, i.e. "Received_File.txt" and not as a raw data file. There does not seem to be a raw data handling setting in the Serial app. Please let me know if you have found otherwise.
* When Lisa does send the file via xmodem transfer, the Serial app does not seem to close the transfer and save the file when the Lisa has finished sending. It continues to receive and wait for more data, and my only option is to cancel - rather than save what has been sent.

--- Quote from: Lisa2 on November 28, 2024, 10:47:30 am ---
--- Quote from: ried on November 27, 2024, 10:15:34 pm ---Can you please share your specific make & model of FTDI-based USB to serial adapter? Which null modem cable (or other DB25 to DE-9 adapters) are you using?

--- End quote ---

The USB adapter I used is a USO9ML2-LS made by B&B Electronics (now Advantech):

https://www.advantech.com/en-us/products/b851dad7-5f2f-46da-926d-6fe3157b34aa/bb-uso9ml2-ls-a/mod_3aa59323-fad3-4a62-bc81-47d4c4ce2511

--- End quote ---

That is very helpful. I suspect we have found the difference between a $10-30 adapter and a $150 adapter :D  I shall change out the adapter and report back. Thank you both very much.

Lisa2:
I’m glad this topic came up.  I’ve been a coolterm user for sometime, but I did not know they added xmodem support recently. 
To tell the truth, the last BLU project I worked on, I had to use Windows (teraterm) because I didn’t know coolterm  had xmodem support.
Rick

ried:
Further investigation indicates that the Serial B traces are damaged on the 2/5 motherboards - likely due to battery corrosion from long ago. I have tried multiple (known good) I/O boards, but the result is the same. Now we know.

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