PC-MOS released under GPL(osnews.com)

    printf 'memdev = $386.sys /p\r\n' > config.sys
    printf 'device = pcterm.sys\r\n' >> config.sys
    printf 'device = $serial.sys /ad=03f8,in=4,hs=x,ib=2048,ob=2048\r\n' >> config.sys
    printf 'smpsize = 80k\r\n' >> config.sys
    printf 'buffers = 40\r\n' >> config.sys
    touch -mt 9311171533 config.sys
    mcopy -n -o -i a.img -m config.sys ::

    printf 'addtask 300k,1,,user01,pcterm,1,19200\r\n' > autoexec.bat
    touch -mt 9311171533 autoexec.bat
    mcopy -n -o -i a.img -m autoexec.bat ::

    qemu-system-i386 -fda a.img -chardev socket,server,host=127.0.0.1,port=4555,id=com1 -serial chardev:com1 -rtc base=1994-06-17T16:01:21

    nc localhost 4555