Marco Maccaferri

Yes, with both set to raw it should work. ZModem should work with telnet-enabled BBS (it was designed as such), there is something weird that prevents it from working. Don't know if it is DOSBox or something else, some ZModem implementations may not fully respect the protocol. Honestly I haven't experimented much with it due to this kind of problems, and was happy with raw connections. Most programs support it so it is just a matter of configuring the client.

I have checked the downloads using Syncterm (Linux) and Telix (DOSBox) and both works with the raw connection. Telnet connections have problems with both programs, I guess there is something weird with it. Anyway, doesn't seems an issue with this patch, but with the telnet filter or some settings.

One thing to check is how the terminal connects with the BBS, if it is using the Telnet protocol you need to add ATNET1 to the BBS modem initialization, if it is using a plain raw protocol you need to add ATNET0 to the BBS modem initialization. In other words, both the BBS and the Terminal must use the same connection protocol.

Forgot to tell, this patch is mostly needed when operating a BBS with Dosbox, trasmitting files and data. Client terminals mostly receive data so are not affected by the escape bug, until you attempt to upload files to a BBS.

Most probably, the remote BBS requires telnet handling, have you tried issuing ATNET1 before connecting ?

Softmodem escape characters handling