Updated readme

tools/package/itch/README.rasberrypi.txt

@@ -1,11 +1,24 @@
 Copy all files to the root directory of a FAT32 formated SDCard.
 (Only RasberryPi 3 and 4 is supported at this time.)
 
-Default boot order is SD:A.img, SD:C.img, USB:RAW
+The default boot order is SD:A.img, SD:C.img, USB:RAW. Note that USB drives
+are not plug and play. They need to be inserted and removed while the system
+is powered off as they are considered harddrives in the virtual system.
+The size of a USB drive when mounted is caped at ~504MB but the actual device
+can be of any size. To prevent disk corruption it is recommended to use FDISK
+in DOS to ensure the correct size and format when using a USB drive.
+
+Ethernet support should work but is not well tested. Run the ETHERNET.BAT
+file on the included disk image to load drivers and launch DHCP server.
+
+Known issus:
+  * Audio is not working atm. :(
+  * Keyboard has issues at times.
+  * Old USB mouses have been known to lockup the system when connected. 
 
 VirtualXT specific options in cmdline.txt are:
-	BOOT=<set boot device, BIOS disk id>
-	FD=<floppy image on SDCard>
-	HD=<harddrive image on SDCard>
-	LOGFILE=<log to file on SDCard>
-	CPUFREQ=<virtual CPU frequency in Hz>
+  BOOT=<set boot device, BIOS disk id>
+  FD=<floppy image on SDCard>
+  HD=<harddrive image on SDCard>
+  LOGFILE=<log to file on SDCard>
+  CPUFREQ=<virtual CPU frequency in Hz>