Groups > comp.sys.apple2.programmer > #784

Re: Good way to detect the current environment within ProDOS - launcher or BASIC?

From	ol.sc@web.de (Oliver Schmidt)
Newsgroups	comp.sys.apple2.programmer
Subject	Re: Good way to detect the current environment within ProDOS - launcher or BASIC?
Date	2013-08-03 10:12 +0000
Organization	1&1 Internet AG
Message-ID	<ktil1o$ur9$1@online.de> (permalink)
References	<ksmbtj$lkb$1@dont-email.me>

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Hi David,

>I'd like to tell the current ProDOS environment underneath my program. 
>I want to quit differently depending on being launched from BASIC (just 
>RTS) or from the program launcher (ProDOS QUIT MLI call).

I didn't follow the reset vector approach pointed out by others.
Instead I look at the ProDOS system bit map:

https://github.com/oliverschmidt/cc65/blob/master/libsrc/apple2/crt0.s

Lines 143 to 146:

; Check ProDOS system bit map
lda     $BF6F           ; Protection for pages $B8 - $BF
cmp     #%00000001      ; Exactly system global page is protected
bne     basic

Regards,
Oliver

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Thread

Good way to detect the current environment within ProDOS - launcher or BASIC? David Schmidt <schmidtd@my-deja.com> - 2013-07-23 12:50 -0400
  Re: Good way to detect the current environment within ProDOS - launcher or BASIC? BLuRry <brendan.robert@gmail.com> - 2013-07-23 12:10 -0700
    Re: Good way to detect the current environment within ProDOS - launcher or BASIC? David Schmidt <schmidtd@my-deja.com> - 2013-07-23 16:37 -0400
      Re: Good way to detect the current environment within ProDOS - launcher or BASIC? BLuRry <brendan.robert@gmail.com> - 2013-07-23 17:29 -0700
        Re: Good way to detect the current environment within ProDOS - launcher or BASIC? Antoine Vignau <antoine.vignau@laposte.net> - 2013-07-24 11:16 -0700
          Re: Good way to detect the current environment within ProDOS - launcher or BASIC? BLuRry <brendan.robert@gmail.com> - 2013-07-24 12:17 -0700
  Re: Good way to detect the current environment within ProDOS - launcher or BASIC? gids.rs@sasktel.net - 2013-07-25 08:37 -0700
    Re: Good way to detect the current environment within ProDOS - launcher or BASIC? David Schmidt <schmidtd@my-deja.com> - 2013-07-25 12:57 -0400
      Re: Good way to detect the current environment within ProDOS - launcher or BASIC? gids.rs@sasktel.net - 2013-07-25 15:58 -0700
  Re: Good way to detect the current environment within ProDOS - launcher   or BASIC? ol.sc@web.de (Oliver Schmidt) - 2013-08-03 10:12 +0000

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