If you want to try and download these programs to your Sol, here's how to do it.

    Grab the *.ent file you are interested from one of the tables below.
    Connect a serial cable from your PC to your Sol
    Set the baud rate, data bits, parity bits, and stop bits the same on the
    two machines. I have difficulty getting my Sol to transfer reliably if the
    baud rate is higher than 1200. YMMV.
    Test that the link works. Use the TERM command to do so.
    On the Sol, type "SET I=1". This makes it accept subsequent input from the
    serial port, as if you were entering it from the keyboard.
    On the PC, transfer the *.ent file over the serial link as a straight ASCII
    file.
    To run the program, type "EX xxxx", where xxxx is the load address, and off
    she goes!

Mike Douglas has having troubles getting ENT programs to load into his machine
at 9600 baud. After puzzling over it a bit, he found that some .ENT files are
saved with CR/LF line endings. He found that deleting the line feeds from the
files and telling his term program (TerraTerm) to insert a 100 ms delay after
each CR fixed it -- he could then reliably send data at 9600 baud. That 100ms
is to give SOLOS enough time to scroll the screen after each line.