use DISKID define instead of hardcoded value

git-svn-id: svn://svn.cc65.org/cc65/trunk@391 b7a2c559-68d2-44c3-8de9-860c34a00d81

diff --git a/libsrc/atari/siocall.s b/libsrc/atari/siocall.s
index 7737d3c5c34779ba379248e73ca38dad256d0a0f..1e6981acc681c84e2f9298c36075ac6a94e8ad01 100644 (file)
--- a/libsrc/atari/siocall.s
+++ b/libsrc/atari/siocall.s
@@ -55,7 +55,7 @@
        lda     (ptr1),y
        sta     DBYTHI
 
-       lda     #$31            ; D1 (drive_id == 0) has id $31
+       lda     #DISKID         ; SIO bus ID of diskette drive
        sta     DDEVIC
        lda     #15
        sta     DTIMLO          ; value got from DOS source