diff --git a/Components/8272/i8272.cpp b/Components/8272/i8272.cpp
index eb23cf694..e84584876 100644
--- a/Components/8272/i8272.cpp
+++ b/Components/8272/i8272.cpp
@@ -428,19 +428,11 @@ void i8272::posit_event(int event_type) {
 			begin_writing();
 
 			if(get_is_double_density()) {
-				for(int c = 0; c < 50; c++) {
-					write_byte(0x4e);
-				}
-				for(int c = 0; c < 12; c++) {
-					write_byte(0x00);
-				}
+				write_n_bytes(50, 0x4e);
+				write_n_bytes(12, 0x00);
 			} else {
-				for(int c = 0; c < 11; c++) {
-					write_byte(0xff);
-				}
-				for(int c = 0; c < 6; c++) {
-					write_byte(0x00);
-				}
+				write_n_bytes(11, 0xff);
+				write_n_bytes(6, 0x00);
 			}
 
 			WAIT_FOR_EVENT(Event::DataWritten);
@@ -572,28 +564,28 @@ void i8272::posit_event(int event_type) {
 
 			// Write start-of-track.
 			if(get_is_double_density()) {
-				for(int c = 0; c < 80; c++)	write_byte(0x4e);
-				for(int c = 0; c < 12; c++)	write_byte(0x00);
+				write_n_bytes(80, 0x4e);
+				write_n_bytes(12, 0x00);
 				for(int c = 0; c < 3; c++)	write_raw_short(Storage::Encodings::MFM::MFMIndexSync);
 				write_byte(Storage::Encodings::MFM::IndexAddressByte);
-				for(int c = 0; c < 50; c++)	write_byte(0x4e);
+				write_n_bytes(50, 0x4e);
 			} else {
-				for(int c = 0; c < 40; c++)	write_byte(0xff);
-				for(int c = 0; c < 6; c++)	write_byte(0x00);
+				write_n_bytes(40, 0xff);
+				write_n_bytes(6, 0x00);
 				write_raw_short(Storage::Encodings::MFM::FMIndexAddressMark);
-				for(int c = 0; c < 26; c++)	write_byte(0xff);
+				write_n_bytes(26, 0xff);
 			}
 			WAIT_FOR_EVENT(Event::DataWritten);
 			sector_ = 0;
 
 		format_track_write_sector:
 			if(get_is_double_density()) {
-				for(int c = 0; c < 12; c++)	write_byte(0x00);
+				write_n_bytes(12, 0x00);
 				for(int c = 0; c < 3; c++) write_raw_short(Storage::Encodings::MFM::MFMSync);
 				get_crc_generator().set_value(Storage::Encodings::MFM::MFMPostSyncCRCValue);
 				write_byte(Storage::Encodings::MFM::IDAddressByte);
 			} else {
-				for(int c = 0; c < 6; c++)	write_byte(0x00);
+				write_n_bytes(6, 0x00);
 				get_crc_generator().reset();
 				write_raw_short(Storage::Encodings::MFM::FMIDAddressMark);
 			}
@@ -619,28 +611,22 @@ void i8272::posit_event(int event_type) {
 
 			// Write the sector body.
 			if(get_is_double_density()) {
-				for(int c = 0; c < 22; c++)	write_byte(0x4e);
-				for(int c = 0; c < 12; c++)	write_byte(0x00);
+				write_n_bytes(22, 0x4e);
+				write_n_bytes(12, 0x00);
 				for(int c = 0; c < 3; c++)	write_raw_short(Storage::Encodings::MFM::MFMSync);
 				get_crc_generator().set_value(Storage::Encodings::MFM::MFMPostSyncCRCValue);
 				write_byte(Storage::Encodings::MFM::DataAddressByte);
 			} else {
-				for(int c = 0; c < 11; c++)	write_byte(0xff);
-				for(int c = 0; c < 6; c++)	write_byte(0x00);
+				write_n_bytes(11, 0xff);
+				write_n_bytes(6, 0x00);
 				get_crc_generator().reset();
 				write_raw_short(Storage::Encodings::MFM::FMDataAddressMark);
 			}
-			for(int c = 0; c < (128 << command_[2]); c++) {
-				write_byte(command_[5]);
-			}
+			write_n_bytes(128 << command_[2], command_[5]);
 			write_crc();
 
 			// Write the prescribed gap.
-			if(get_is_double_density()) {
-				for(int c = 0; c < command_[4]; c++)	write_byte(0x4e);
-			} else {
-				for(int c = 0; c < command_[4]; c++)	write_byte(0xff);
-			}
+			write_n_bytes(command_[4], get_is_double_density() ? 0x4e : 0xff);
 
 			// Consider repeating.
 			sector_++;
diff --git a/Storage/Disk/MFMDiskController.cpp b/Storage/Disk/MFMDiskController.cpp
index 51f4ac3b2..18eca4fcb 100644
--- a/Storage/Disk/MFMDiskController.cpp
+++ b/Storage/Disk/MFMDiskController.cpp
@@ -181,3 +181,7 @@ void MFMController::write_crc() {
 	write_byte(crc >> 8);
 	write_byte(crc & 0xff);
 }
+
+void MFMController::write_n_bytes(int quantity, uint8_t value) {
+	while(quantity--) write_byte(value);
+}
diff --git a/Storage/Disk/MFMDiskController.hpp b/Storage/Disk/MFMDiskController.hpp
index 4ace6665e..dde8d425c 100644
--- a/Storage/Disk/MFMDiskController.hpp
+++ b/Storage/Disk/MFMDiskController.hpp
@@ -113,6 +113,11 @@ class MFMController: public Controller {
 		*/
 		void write_crc();
 
+		/*!
+			Calls @c write_byte with @c value, @c quantity times.
+		*/
+		void write_n_bytes(int quantity, uint8_t value);
+
 	private:
 		// Storage::Disk::Controller
 		virtual void process_input_bit(int value, unsigned int cycles_since_index_hole);