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+====== Delay ======
+by Zed Yago
+When stabilizing a IRQ, you often need a subroutine or macro which can delay a given amount of cycles.
+<code>
+delay:            ;delay 84-accu cycles, 0<=accu<=65
+  lsr             ;2 cycles akku=akku/2 carry=1 if accu was odd, 0 otherwise
+  bcc waste1cycle ;2/3 cycles, depending on lowest bit, same operation for both
+waste1cycle:
+  sta smod+1      ;4 cycles selfmodifies the argument of branch
+  clc             ;2 cycles
+;now we have burned 10/11 cycles.. and jumping into a nopfield
+smod:
+  bcc *+10        ;3 cycles
+  .buf 32 $EA     ;just type 32x nop if your assembler doesnt support this command
+                  ;  or type "!fill 32, $ea" if you are using ACME
+  rts             ;6 cycles
+</code>