Looking for a working YMODEM command example

[ccarlson71]

I have a disk full of communications tools for my 4P, including what appears to be a standalone YMODEM send/receive tool, but can't for the life of me figure out how to get it working.

I'd like to be able to batch send files to the 4P using it—is that possible? If so, how?

(FWIW, I do already have a null modem cable, which I've used successfully with serial boot mode and with an XMODEM receive tool.)

 

[Chuck(G)]

The YMODEM protocol is well-documented (look for the Chuck Forsberg narrative on the web). I've implemented it on an MCU and it's used more than you'd think in buried applications. Its main advantage is sending a precise-length file in 1K blocks with file name information. I don't know anything about the comm tools for your 4P, but YMODEM isn't terribly sophisticated. Be aware that the client must be the initiator of YMODEM protocol. Even Linux minicom can do YMODEM.

 

[TRS-80.com]

YModem by Richard VanHouten is available for download on trs-80.com; just search for it in the archive search and download.

 

[ccarlson71]

The tool by VanHouten is what I have—I just can't get it to actually do anything, regardless of what options I provide.