1 files changed, 5 insertions, 0 deletions
diff --git a/crt0_5200.s b/crt0_5200.s
index cdc882a..102bab9 100644
--- a/crt0_5200.s
+++ b/crt0_5200.s
@@ -104,6 +104,11 @@ start:
  lda  #$02
  sta  SKCTL  ;Enable Keyboard scanning
 
+ lda #$40
+ sta IRQEN ; enable keyboard IRQ
+ sta POKMSK
+ cli       ; enable IRQ
+
  .out .sprintf("%d bytes", * - start)
 ;;; end of OS ROM code, rest of file is standard 5200 crt0.s.