Usage:

   ys file1 [file2... filen]

"ys" is a YMODEM send program for Elf/OS. You can specify multiple files on the command line, but not (yet?) wildcards.

Build 9 includes the ability to send all the files in a single directory by just including the directory name. For instance, if you wanted to send all the files in /bin, you'd use the command:

   ys /bin

It's not recursive; if there were subdirectories within bin, the files within them wouldn't be sent.

Build 8 includes automatic UART configuration. Using BIOS calls for all I/O isn't quite fast enough to catch the ACK and CRC/NAK at the end of a block 0 send using the big banged UART, so inlined code needs to be used. The price that had to be paid for that is having to figure out which EF line is being used, and what the idling states of that line and Q are.

Thanks to David Madole coming up with some ingenious code to figure out which EF line is being used, ys can automatically configure itself for either a real UART (all BIOS calls) or a soft UART using any of the EF lines, and any polarity on both receive and transmit.

• Elfos-yr
  
• Elfos-Elf-xr