Update README.md

README.md

@@ -58,6 +58,58 @@ The _r_, _j_ and _i_ commands display the value of the AX register after returni
 See example in _hello.com_
 
 
+## Examples
+
+### Launching mushroom client
+
+```
+s 200
+l mushroom.com
+r
+```
+
+### FTP a file and store it to the floppy disk
+
+```
+s 200
+l ftpget.com
+```
+
+* switch to segment _0x200_
+* load file _ftpget.com_ to _cur-seg:0100_
+
+Here you need to run this on the host:
+```
+python ftpserve.py src/hello.com
+```
+
+Then on polOS:
+```
+r f000 200
+s 0
+6000
+w 48454c4c4f202020434f4d
+i 0800 6000 f000 200
+```
+
+* run previously loaded `ftpget.com`: store up to _0x200_ (512) bytes to address _0000:f000_
+* set _cur-seg_ to _0x0000_
+* set _cur-add_ to _0x6000_
+* write file name in ascii: `HELLO   COM` to _0000:6000_
+* call int 0x80 0x08 (writefile) with args: _fname_, _addr_, _size_
+
+
+We can now test that the program got transferred correctly:
+```
+s 300
+l hello.com
+r
+```
+
+### But where is my `ls` command?
+
+You can just inspect memory at _0000:1c00_, that's the root directory. Each entry is _0x20_ (32) bytes long and starts with 11 characters that constitute the file name.
+
 ## Useful stuff
 
 * [Colab](https://colab.research.google.com/drive/1xGKYQJLKyabcSNYOiPumf9_-bbCbXke1?usp=sharing)