diff --git a/hardware.h b/hardware.h
index b9c9340..04e11a6 100644
--- a/hardware.h
+++ b/hardware.h
@@ -15,7 +15,7 @@
 
 // PS/2 keyboard
 #define KBD_DATA	14
-#define KBD_IRQ		12
+#define KBD_IRQ		0
 
 // SPI-RAM
 #undef SPIRAM_CS
@@ -24,6 +24,9 @@
 #undef SD_CS
 #define USE_SPIFFS	1
 
+// sound
+#define DAC_SOUND	25
+
 bool hardware_reset();
 void hardware_init(class CPU &);
 void hardware_checkpoint(class Stream &);