diff --git a/src/mame/mg1/mg1.cpp b/src/mame/mg1/mg1.cpp
index db0ac2ed404..9914704443d 100644
--- a/src/mame/mg1/mg1.cpp
+++ b/src/mame/mg1/mg1.cpp
@@ -31,7 +31,7 @@
 #include "machine/wd_fdc.h"
 //#include "machine/upd7261.h"
 #include "machine/mm58174.h"
-#include "machine/timer.h"
+#include "machine/clock.h"
 
 // buses and connectors
 #include "bus/rs232/rs232.h"
@@ -100,7 +100,6 @@ protected:
 
 private:
 	MC6845_UPDATE_ROW(update_row);
-	TIMER_DEVICE_CALLBACK_MEMBER(kbd_clock) { m_iop->m6801_clock_serial(); }
 
 	static void floppy_formats(format_registration &fr);
 
@@ -434,11 +433,11 @@ void mg1_state::mg1(machine_config &config)
 	/*
 	 * Documentation indicates the serial clock for the IOP should be driven by the keyboard, however the available
 	 * keyboard firmware does not produce a compatible clock output. A hand-drawn sketch indicates the system front
-	 * panel allows the serial clock to be generated by a 2.4676MHz crystal and a 4016 divider. The default strapping
+	 * panel allows the serial clock to be generated by a 2.4676MHz crystal and a 4060 divider. The default strapping
 	 * selects a 256 divisor, giving a 9600Hz clock which after the 8x divider in the IOP gives a 1200 baud data rate.
 	 */
-	timer_device &kbd_clk(TIMER(config, "kbd_clock"));
-	kbd_clk.configure_periodic(FUNC(mg1_state::kbd_clock), attotime::from_ticks(256, 2.4576_MHz_XTAL));
+	clock_device &kbd_clk(CLOCK(config, "kbd_clock", 2.4576_MHz_XTAL / 256));
+	kbd_clk.signal_handler().set([this](int state) { if (state) m_iop->m6801_clock_serial(); });
 
 	//SOFTWARE_LIST(config, "flop_list").set_original("mg1_flop");
 	//SOFTWARE_LIST(config, "hdd_list").set_original("mg1_hdd");