Version string display on startup

From BeebWiki

Some programs and transient utilities optionally display their version string on startup. Many do this by reading the ANFS 'Display Version' configuration setting set with *-Net-Opt8,2 or *-Net-Opt8,3. This can easily be done with the following code:

   LDA #&A1      :\ A=&A1 to read Config settings
   LDX #&11      :\ Location 17 is ANFS settings
   LDY #&00      :\ Preload Y with &00 if no response
   JSR OSBYTE    :\ Read Config setting
   TYA           :\ Set N flag from returned setting
   BPL NoMessage :\ If b7=0, don't print message
   \ Print message
   .NoMessage

Similarly in BASIC:

   IF FNbyte(161,17,0)AND&80:PRINT version$

Jgharston 18:59, 30 August 2007 (BST)