diff --git a/src/cpu/cpu.h b/src/cpu/cpu.h
index d07ed7d05..38f18242c 100644
--- a/src/cpu/cpu.h
+++ b/src/cpu/cpu.h
@@ -8,7 +8,7 @@
  *
  *		CPU type handler.
  *
- * Version:	@(#)cpu.h	1.0.8	2018/03/02
+ * Version:	@(#)cpu.h	1.0.9	2018/03/02
  *
  * Authors:	Sarah Walker, <http://pcem-emulator.co.uk/>
  *		leilei,
@@ -463,6 +463,7 @@ extern void	x87_dumpregs(void);
 extern void	x87_reset(void);
 
 extern int	cpu_effective;
+extern void	cpu_dynamic_switch(int new_cpu);
 
 
 #endif	/*EMU_CPU_H*/
diff --git a/src/disk/hdc_ide.c b/src/disk/hdc_ide.c
index 77ec2d8ad..5408cbfb2 100644
--- a/src/disk/hdc_ide.c
+++ b/src/disk/hdc_ide.c
@@ -9,7 +9,7 @@
  *		Implementation of the IDE emulation for hard disks and ATAPI
  *		CD-ROM devices.
  *
- * Version:	@(#)hdc_ide.c	1.0.29	2018/02/27
+ * Version:	@(#)hdc_ide.c	1.0.30	2018/03/02
  *
  * Authors:	Sarah Walker, <http://pcem-emulator.co.uk/>
  *		Miran Grca, <mgrca8@gmail.com>
@@ -1157,11 +1157,11 @@ void writeide(int ide_board, uint16_t addr, uint8_t val)
 			timer_process();
 			if (ide_drive_is_zip(ide))
 			{
-				zip[atapi_zip_drives[ide->channel]].callback = 40000LL * TIMER_USEC /*100LL*IDE_TIME*/;
+				zip[atapi_zip_drives[ide->channel]].callback = 100LL*IDE_TIME;
 			}
 			if (ide_drive_is_cdrom(ide))
 			{
-				cdrom[atapi_cdrom_drives[ide->channel]].callback = 40000LL * TIMER_USEC /*100LL*IDE_TIME*/;
+				cdrom[atapi_cdrom_drives[ide->channel]].callback = 100LL*IDE_TIME;
 			}
 			idecallback[ide_board]=40000LL * TIMER_USEC /*100LL*IDE_TIME*/;
 			timer_update_outstanding();