diff --git a/atusb/fw/ep0.c b/atusb/fw/ep0.c
index 83ab075..0f5e8ef 100644
--- a/atusb/fw/ep0.c
+++ b/atusb/fw/ep0.c
@@ -56,6 +56,20 @@ static void do_buf_write(void *user)
 #define	BUILD_OFFSET	7	/* '#' plus "65535" plus ' ' */
 
 
+#ifdef DEBUG_LOG
+
+#define	LOG_SIZE	16
+
+static struct {
+	uint16_t n;
+	struct setup_request setup;
+} log_buf[LOG_SIZE];
+
+static int log_pos = 0;
+
+#endif /* DEBUG_LOG */
+
+
 static int my_setup(const struct setup_request *setup)
 {
 	uint16_t req = setup->bmRequestType | setup->bRequest << 8;
@@ -63,6 +77,17 @@ static int my_setup(const struct setup_request *setup)
 	uint8_t i;
 	uint64_t tmp64;
 
+#ifdef DEBUG_LOG
+
+	uint8_t pos;
+
+	pos = log_pos & (LOG_SIZE-1);
+	log_buf[pos].n = log_pos;
+	log_buf[pos].setup = *setup;
+	log_pos++;
+
+#endif /* DEBUG_LOG */
+
 	switch (req) {
 	case ATUSB_FROM_DEV(ATUSB_ID):
 		debug("ATUSB_ID\n");
@@ -129,6 +154,12 @@ static int my_setup(const struct setup_request *setup)
 		gpio_cleanup();
 		return 1;
 
+#ifdef DEBUG_LOG
+	case ATUSB_FROM_DEV(ATUSB_READ_LOG):
+		usb_send(&eps[0], log_buf, sizeof(log_buf), NULL, NULL);
+		return 1;
+#endif
+
 	case ATUSB_TO_DEV(ATUSB_SLP_TR):
 		debug("ATUSB_SLP_TR\n");
 		slp_tr();
diff --git a/atusb/fw/include/atusb/ep0.h b/atusb/fw/include/atusb/ep0.h
index 391b114..d4ba0ad 100644
--- a/atusb/fw/include/atusb/ep0.h
+++ b/atusb/fw/include/atusb/ep0.h
@@ -28,6 +28,7 @@
  * ->host	ATUSB_GPIO		dir+data	mask+p#	3
  * host->	ATUSB_SLP_TR		-		-	0
  * host->	ATUSB_GPIO_CLEANUP	-		-	0
+ * ->host	ATUSB_READ_LOG		-		-	#bytes
  *
  * host->	ATUSB_REG_WRITE		value		addr	0
  * ->host	ATUSB_REG_READ		-		addr	1
@@ -82,6 +83,7 @@ enum atspi_requests {
 	ATUSB_GPIO,
 	ATUSB_SLP_TR,
 	ATUSB_GPIO_CLEANUP,
+	ATUSB_READ_LOG,
 	ATUSB_REG_WRITE			= 0x20,	/* transceiver group */
 	ATUSB_REG_READ,
 	ATUSB_BUF_WRITE,