View source for Version string display on startup

[[Category:Programming]]
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
<code>*-Net-Opt8,2</code> or <code>*-Net-Opt8,3</code>.
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$

[[User:Jgharston|Jgharston]] 18:59, 30 August 2007 (BST)