Added docs for new interrupt handler feature

git-svn-id: svn://svn.cc65.org/cc65/trunk@2961 b7a2c559-68d2-44c3-8de9-860c34a00d81

diff --git a/doc/c64.sgml b/doc/c64.sgml
index 5aac45af2a81645fc410232d83975b0aec9965f6..1ebcab31fdfd04e64570422ab544815cd787d562 100644 (file)
--- a/doc/c64.sgml
+++ b/doc/c64.sgml
@@ -269,6 +269,16 @@ The program return code (low byte) is passed back to BASIC by use of the
 <tt/ST/ variable.
 
 
+<sect1>Interrupts<p>
+
+The runtime for the C64 uses routines marked as <tt/.CONDES/ type 2 for
+interrupt handlers. Such routines must be written as simple machine language
+subroutines and will be called automatically by the interrupt handler code
+when they are linked into a program. See the discussion of the <tt/.CONDES/
+feature in the <htmlurl url="ca65.html" name="assembler manual">.
+                       
+
+
 <sect>Bugs/Feedback<p>
 
 If you have problems using the library, if you find any bugs, or if you're