 ╔═════════╗      Help-function for mode-settings of IICTV.
 ╟─┐  ┌────╢
 ║ │  │ ┌──╜      Before you start controlling a device, connect
 ║ │  │ └──╖      a single- or multi-master interface to the
 ╟─┘  └────╢      Centronics parrallel output of your computer.
 ║  B U S  ║      Supply the interface with +5 Volt and connect
 ╚═════════╝      it to your I²C-bus circuit. Now you are ready
                  to control your I²C-bus with IICTV.

-> If you switch on the automatic device update, then each time
   you enter a new value for an item, the update will be transmitted
   to the I²C-bus device.
   Switching the automatic update off allows you to make several changes
   before sending them to the device. (Press: <F3> to transmit registers)

-> All I²C-bus communication is submitted to error checking.
   If anything goes wrong while the error checking is on the user
   will be asked for a decision.
   If you switch off this checking, the program will only sound a short
   beep and then continue.
.PA

-> Very SEVERE errors can occur if your I²C-Centronics interface can't
   work properly. The Checking for SEVERE(!!) I²C-bus errors should
   NEVER be disabled.
   Only if you want to demonstrate menu's from IICTV without
   actually connecting I²C-bus devices you may disable this.
   Don't forget to switch it on again!!!

-> Your computer communicates with the I²C-Centronics interface via
   LPT1, LPT2 or LPT3, which ought to be addressable via addresses :

 ╔═════════╗
 ╟─┐2 ┌────╢      Centronics parallel interface │ LPT1 │ LPT2 │ LPT3
 ║ │  │ ┌──╜      ──────────────────────────────┼──────┼──────┼──────
 ║ │  │ └──╖                 "printer data"     │ 03BC │ 0378 │ 0278
 ╟─┘  └────╢      function:  "printer status"   │ 03BD │ 0379 │ 0279
 ║  B U S  ║                 "printer control"  │ 03BE │ 037A │ 027A
 ╚═════════╝

   With the mode-setting for LPT1/LPT2/LPT3 you can select the correct
   Centronics port addresses for your machine.
.PA

-> If the connected interface board is a multimaster interface with
   ROM version IICIF3:M or higher, you can change the I²C-transmission
   speed in this mode-settings menu, by using following keys: "<" , ">".
   If your interface board is equipped with 6 MHz crystal, the "6 MHz
   value" for the I²C-transmission speed is set.
   If your interface board is equipped with 9.83 MHz crystal, the
   I²C-transmission speed is set to the "9.83 MHz value".
   
   When you use a multimaster interface of an older version, you can set
   the I²C-transmission speed via the 4 dip-switches on the interface
   board. The single-master interface is timed by your PC and operates
   at approximately 10 kHz.