diff --git a/Machines/PCCompatible/DMA.hpp b/Machines/PCCompatible/DMA.hpp
index ddd17f1ea..875449843 100644
--- a/Machines/PCCompatible/DMA.hpp
+++ b/Machines/PCCompatible/DMA.hpp
@@ -31,7 +31,7 @@ class i8237 {
 
 		template <int address>
 		void write(uint8_t value) {
-			printf("DMA: Write %02x to %d\n", value, address);
+//			printf("DMA: Write %02x to %d\n", value, address);
 
 			switch(address) {
 				default: {
@@ -66,7 +66,7 @@ class i8237 {
 
 		template <int address>
 		uint8_t read() {
-			printf("DMA: Read %d\n", address);
+//			printf("DMA: Read %d\n", address);
 			switch(address) {
 				default: {
 					constexpr int channel = (address >> 1) & 3;
@@ -146,7 +146,7 @@ class i8237 {
 				channel.transfer_complete = false;
 			}
 
-			printf("DMA: status is %02x\n", result);
+//			printf("DMA: status is %02x\n", result);
 
 			return result;
 		}
@@ -157,19 +157,19 @@ class i8237 {
 		}
 
 		void flip_flop_reset() {
-			printf("DMA: Flip flop reset\n");
+//			printf("DMA: Flip flop reset\n");
 			next_access_low_ = true;
 		}
 
 		void mask_reset() {
-			printf("DMA: Mask reset\n");
+//			printf("DMA: Mask reset\n");
 			for(auto &channel : channels_) {
 				channel.mask = false;
 			}
 		}
 
 		void master_reset() {
-			printf("DMA: Master reset\n");
+//			printf("DMA: Master reset\n");
 			flip_flop_reset();
 			for(auto &channel : channels_) {
 				channel.mask = true;
@@ -183,17 +183,17 @@ class i8237 {
 		}
 
 		void set_reset_mask(uint8_t value) {
-			printf("DMA: Set/reset mask %02x\n", value);
+//			printf("DMA: Set/reset mask %02x\n", value);
 			channels_[value & 3].mask = value & 4;
 		}
 
 		void set_reset_request(uint8_t value) {
-			printf("DMA: Set/reset request %02x\n", value);
+//			printf("DMA: Set/reset request %02x\n", value);
 			channels_[value & 3].request = value & 4;
 		}
 
 		void set_mask(uint8_t value) {
-			printf("DMA: Set mask %02x\n", value);
+//			printf("DMA: Set mask %02x\n", value);
 			channels_[0].mask = value & 1;
 			channels_[1].mask = value & 2;
 			channels_[2].mask = value & 4;
@@ -201,7 +201,7 @@ class i8237 {
 		}
 
 		void set_mode(uint8_t value) {
-			printf("DMA: Set mode %02x\n", value);
+//			printf("DMA: Set mode %02x\n", value);
 			channels_[value & 3].transfer = Channel::Transfer((value >> 2) & 3);
 			channels_[value & 3].autoinitialise = value & 0x10;
 			channels_[value & 3].address_decrement = value & 0x20;
@@ -209,7 +209,7 @@ class i8237 {
 		}
 
 		void set_command(uint8_t value) {
-			printf("DMA: Set command %02x\n", value);
+//			printf("DMA: Set command %02x\n", value);
 			enable_memory_to_memory_ = value & 0x01;
 			enable_channel0_address_hold_ = value & 0x02;
 			enable_controller_ = value & 0x04;
diff --git a/Machines/PCCompatible/PCCompatible.cpp b/Machines/PCCompatible/PCCompatible.cpp
index 725987d1e..46eca6354 100644
--- a/Machines/PCCompatible/PCCompatible.cpp
+++ b/Machines/PCCompatible/PCCompatible.cpp
@@ -136,13 +136,13 @@ class FloppyController {
 
 					case Command::ReadDeletedData:
 					case Command::ReadData: {
-						printf("FDC: Read from drive %d / head %d / track %d of head %d / track %d / sector %d\n",
-							decoder_.target().drive,
-							decoder_.target().head,
-							drives_[decoder_.target().drive].track,
-							decoder_.geometry().head,
-							decoder_.geometry().cylinder,
-							decoder_.geometry().sector);
+//						printf("FDC: Read from drive %d / head %d / track %d of head %d / track %d / sector %d\n",
+//							decoder_.target().drive,
+//							decoder_.target().head,
+//							drives_[decoder_.target().drive].track,
+//							decoder_.geometry().head,
+//							decoder_.geometry().cylinder,
+//							decoder_.geometry().sector);
 
 						status_.begin(decoder_);
 
@@ -304,7 +304,7 @@ class FloppyController {
 
 	private:
 		void reset() {
-			printf("FDC reset\n");
+//			printf("FDC reset\n");
 			decoder_.clear();
 			status_.reset();