--- BasiliskII/TECH	1999/10/03 14:16:25	1.1
+++ BasiliskII/TECH	1999/10/21 18:29:06	1.2
@@ -239,6 +239,7 @@ which are relatively independent from ea
  - floppy driver ("sony.cpp")
  - disk driver ("disk.cpp")
  - CD-ROM driver ("cdrom.cpp")
+ - external file system ("extfs.cpp")
  - serial drivers ("serial.cpp")
  - Ethernet driver ("ether.cpp")
  - system-dependant device access ("sys_*.cpp")
@@ -380,7 +381,19 @@ MacOS floppy driver comes from the fact
 Mac models was custom-built for Apple by Sony (this was one of the first
 applications of the 3.5" floppy format which was also invented by Sony).
 
-6.10. Serial drivers
+6.10. External file system
+--------------------------
+
+Basilisk II also provides a method for accessing files and direcories on the
+host OS from the MacOS side by means of an "external" file system (henceforth
+called "ExtFS"). The ExtFS is built upon the File System Manager 1.2 interface
+that is built into MacOS 7.6 (and later) and available as a system extension
+for earlier MacOS versions. Unlike other parts of Basilisk II, extfs.cpp
+requires POSIX file I/O and this is not going to change any time soon, so if
+you are porting Basilisk II to a system without POSIX file functions, you
+should emulate them.
+
+6.11. Serial drivers
 --------------------
 
 Similar to the disk drivers, Basilisk II contains replacement serial drivers
@@ -404,7 +417,7 @@ install a Deferred Task to do the job. T
 MacOS when it returns to interrupt level 0. This mechanism sounds complicated
 but is necessary to ensure stable operation of the serial driver.
 
-6.11. Ethernet driver
+6.12. Ethernet driver
 ---------------------
 
 A driver for Ethernet networking is also contained in the NuBus slot ROM.
@@ -474,7 +487,7 @@ of what happens upon reception of a pack
 
 For a more detailed description of the Ethernet driver, see "Inside AppleTalk".
 
-6.12. System-dependant device access
+6.13. System-dependant device access
 ------------------------------------
 
 The method for accessing floppy drives, hard disks, CD-ROM drives and files
@@ -483,14 +496,15 @@ portable, all device I/O is made via the
 implemented by the (system-dependant) "sys_*.cpp" modules which provides a
 standard, Unix-like interface to all kinds of devices.
 
-6.13. User interface strings
+6.14. User interface strings
 ----------------------------
 
 To aid in localization, all user interface strings of Basilisk II are collected
-in "user_strings.cpp" and accessed via the GetString() function. This way,
-Basilisk II may be easily translated to different languages.
+in "user_strings.cpp" (for common strings) and "user_strings_*.cpp" (for
+platform-specific strings), and accessed via the GetString() function. This
+way, Basilisk II may be easily translated to different languages.
 
-6.14. Preferences management
+6.15. Preferences management
 ----------------------------
 
 The module "prefs.cpp" handles user preferences in a system-independant way.