diff --git a/Source/HBIOS/cfg_rcez80.asm b/Source/HBIOS/cfg_rcez80.asm
index a04ac19f..3cd7910b 100644
--- a/Source/HBIOS/cfg_rcez80.asm
+++ b/Source/HBIOS/cfg_rcez80.asm
@@ -31,7 +31,7 @@ AUTOCON		.EQU	TRUE		; ENABLE CONSOLE TAKEOVER AT LOADER PROMPT
 CPUSPDCAP	.EQU	SPD_FIXED	; CPU SPEED CHANGE CAPABILITY SPD_FIXED|SPD_HILO
 CPUSPDDEF	.EQU	SPD_HIGH	; CPU SPEED DEFAULT SPD_UNSUP|SPD_HIGH|SPD_LOW
 CPUOSC		.EQU	18432000	; CPU OSC FREQ IN MHZ
-INTMODE		.EQU	1		; INTERRUPTS: 0=NONE, 1=MODE 1, 2=MODE 2, 3=MODE 3 (Z280)
+INTMODE		.EQU	1		; INTERRUPTS: 0=NONE, 1=MODE 1, 2=MODE 2, 3=MODE 3 (EZ80 operates with IM 2 - simulating IM 1)
 DEFSERCFG	.EQU	SER_115200_8N1 | SER_RTS	; DEFAULT SERIAL LINE CONFIG (SEE STD.ASM)
 ;
 RAMSIZE		.EQU	512		; SIZE OF RAM IN KB (MUST MATCH YOUR HARDWARE!!!)
diff --git a/Source/HBIOS/hbios.asm b/Source/HBIOS/hbios.asm
index 6d476148..9d22a730 100644
--- a/Source/HBIOS/hbios.asm
+++ b/Source/HBIOS/hbios.asm
@@ -5058,6 +5058,13 @@ SYS_GETFN:
 ;     DE:HL: TIMER VALUE (32 BIT)
 ;
 SYS_GETTIMER:
+#IF (CPUFAM == CPU_EZ80)
+	LD	A, 2
+	LD	B, 0	; GET TIMER TICK
+	EZ80_FN
+	RET
+
+#ELSE
 	LD	HL,HB_TICKS
 	HB_DI
 	CALL	LD32
@@ -5065,6 +5072,8 @@ SYS_GETTIMER:
 	LD	C, TICKFREQ
 	XOR	A
 	RET
+#ENDIF
+
 ;
 ; GET SECONDS
 ;   RETURNS:
@@ -5072,6 +5081,13 @@ SYS_GETTIMER:
 ;     C: NUM TICKS WITHIN CURRENT SECOND
 ;
 SYS_GETSECS:
+#IF (CPUFAM == CPU_EZ80)
+	LD	A, 2
+	LD	B, 1	; GET SECOND TICK
+	EZ80_FN
+	RET
+
+#ELSE
 	LD	HL,HB_SECS
 	HB_DI
 	CALL	LD32
@@ -5082,6 +5098,7 @@ SYS_GETSECS:
 	LD	C,A
 	XOR	A
 	RET
+#ENDIF
 ;
 ; GET BOOT INFORMATION
 ;   RETURNS:
@@ -5289,24 +5306,38 @@ SYS_SETBOOTINFO:
 ;     DE:HL: TIMER VALUE (32 BIT)
 ;
 SYS_SETTIMER:
+#IF (CPUFAM == CPU_EZ80)
+	LD	A, 2
+	LD	B, 2	; SET TICKS
+	EZ80_FN
+	RET
+#ELSE
 	LD	BC,HB_TICKS
 	HB_DI
 	CALL	ST32
 	HB_EI
 	XOR	A
 	RET
+#ENDIF
 ;
 ; SET SECS
 ;   ON ENTRY:
 ;     DE:HL: SECONDS VALUE (32 BIT)
 ;
 SYS_SETSECS:
+#IF (CPUFAM == CPU_EZ80)
+	LD	A, 2
+	LD	B, 3	; SET SECS
+	EZ80_FN
+	RET
+#ELSE
 	LD	BC,HB_SECS
 	HB_DI
 	CALL	ST32
 	HB_EI
 	XOR	A
 	RET
+#ENDIF
 ;
 ; SET SYSTEM CPU SPEED ATTRIBUTES
 ;   ON ENTRY:
diff --git a/Source/RomDsk/Makefile b/Source/RomDsk/Makefile
index c4ab2ec3..57e5ff7c 100644
--- a/Source/RomDsk/Makefile
+++ b/Source/RomDsk/Makefile
@@ -6,8 +6,8 @@ include $(TOOLS)/Makefile.inc
 
 .SHELLFLAGS = -ce
 
-ROMAPPS1 := assign mode rtc syscopy xm ../../Source/Images/Common/All/WDATE
-ROMAPPS2 := fdu format survey sysgen talk timer cpuspd
+ROMAPPS1 := assign mode rtc syscopy xm
+ROMAPPS2 := fdu format survey sysgen talk cpuspd
 
 rom128_%.dat: DISKDEF=wbw_rom128
 rom256_%.dat: DISKDEF=wbw_rom256
diff --git a/Source/RomDsk/ROM_384KB/timer.com b/Source/RomDsk/ROM_384KB/timer.com
new file mode 100644
index 00000000..be41c754
Binary files /dev/null and b/Source/RomDsk/ROM_384KB/timer.com differ