diff --git a/backend_kodak605.c b/backend_kodak605.c
index 7fb4033..1efe133 100644
--- a/backend_kodak605.c
+++ b/backend_kodak605.c
@@ -677,6 +677,7 @@ static void kodak605_cmdline(void)
 	DEBUG("\t\t[ -R ]           # Reset printer to factory defaults\n");
 	DEBUG("\t\t[ -s ]           # Query status\n");
 	DEBUG("\t\t[ -X jobid ]     # Cancel job\n");
+//	DEBUG("\t\t[ -Z ]           # Dump all parameters\n");
 }
 
 static int kodak605_cmdline_arg(void *vctx, int argc, char **argv)
@@ -687,7 +688,7 @@ static int kodak605_cmdline_arg(void *vctx, int argc, char **argv)
 	if (!ctx)
 		return -1;
 
-	while ((i = getopt(argc, argv, GETOPT_LIST_GLOBAL "b:c:C:eFil:L:mrRsX:")) >= 0) {
+	while ((i = getopt(argc, argv, GETOPT_LIST_GLOBAL "b:c:C:eFil:L:mrRsX:Z")) >= 0) {
 		switch(i) {
 		GETOPT_PROCESS_GLOBAL
 		case 'b':
@@ -735,10 +736,13 @@ static int kodak605_cmdline_arg(void *vctx, int argc, char **argv)
 			if (!j)
 				kodak605_dump_status(ctx, &sts);
 			break;
+		}
 		case 'X':
 			j = sinfonia_canceljob(&ctx->dev, atoi(optarg));
 			break;
-		}
+		case 'Z':
+			j = sinfonia_dumpallparams(&ctx->dev);
+			break;
 		default:
 			break;  /* Ignore completely */
 		}
diff --git a/backend_shinkos6145.c b/backend_shinkos6145.c
index 0162eac..f526d90 100644
--- a/backend_shinkos6145.c
+++ b/backend_shinkos6145.c
@@ -879,6 +879,7 @@ static void shinkos6145_cmdline(void)
 	DEBUG("\t\t[ -R ]           # Reset printer to factory defaults\n");
 	DEBUG("\t\t[ -s ]           # Query status\n");
 	DEBUG("\t\t[ -X jobid ]     # Abort a printjob\n");
+//	DEBUG("\t\t[ -Z ]           # Dump all parameters\n");
 }
 
 int shinkos6145_cmdline_arg(void *vctx, int argc, char **argv)
@@ -889,7 +890,7 @@ int shinkos6145_cmdline_arg(void *vctx, int argc, char **argv)
 	if (!ctx)
 		return -1;
 
-	while ((i = getopt(argc, argv, GETOPT_LIST_GLOBAL "c:C:eFik:l:L:mr:Q:q:rR:sX:")) >= 0) {
+	while ((i = getopt(argc, argv, GETOPT_LIST_GLOBAL "c:C:eFik:l:L:mr:Q:q:rR:sX:Z")) >= 0) {
 		switch(i) {
 		GETOPT_PROCESS_GLOBAL
 		case 'c':
@@ -954,6 +955,9 @@ int shinkos6145_cmdline_arg(void *vctx, int argc, char **argv)
 		case 'X':
 			j = sinfonia_canceljob(&ctx->dev, atoi(optarg));
 			break;
+		case 'Z':
+			j = sinfonia_dumpallparams(&ctx->dev);
+			break;
 		default:
 			break;  /* Ignore completely */
 		}
diff --git a/backend_shinkos6245.c b/backend_shinkos6245.c
index 56e95d6..ec59686 100644
--- a/backend_shinkos6245.c
+++ b/backend_shinkos6245.c
@@ -799,6 +799,7 @@ static void shinkos6245_cmdline(void)
 	DEBUG("\t\t[ -R ]           # Reset printer to factory defaults\n");
 	DEBUG("\t\t[ -s ]           # Query status\n");
 	DEBUG("\t\t[ -X jobid ]     # Abort a printjob\n");
+//	DEBUG("\t\t[ -Z ]           # Dump all parameters\n");
 }
 
 int shinkos6245_cmdline_arg(void *vctx, int argc, char **argv)
@@ -809,7 +810,7 @@ int shinkos6245_cmdline_arg(void *vctx, int argc, char **argv)
 	if (!ctx)
 		return -1;
 
-	while ((i = getopt(argc, argv, GETOPT_LIST_GLOBAL "b:c:C:eFik:l:L:mrR:sX:")) >= 0) {
+	while ((i = getopt(argc, argv, GETOPT_LIST_GLOBAL "b:c:C:eFik:l:L:mrR:sX:Z")) >= 0) {
 		switch(i) {
 		GETOPT_PROCESS_GLOBAL
 		case 'b':
@@ -882,6 +883,9 @@ int shinkos6245_cmdline_arg(void *vctx, int argc, char **argv)
 		case 'X':
 			j = sinfonia_canceljob(&ctx->dev, atoi(optarg));
 			break;
+		case 'Z':
+			j = sinfonia_dumpallparams(&ctx->dev);
+			break;
 		default:
 			break;  /* Ignore completely */
 		}
diff --git a/backend_sinfonia.c b/backend_sinfonia.c
index 8488cf9..b92c12f 100644
--- a/backend_sinfonia.c
+++ b/backend_sinfonia.c
@@ -435,6 +435,20 @@ int sinfonia_getparam(struct sinfonia_usbdev *usbh, int target, uint32_t *param)
 	return ret;
 }
 
+int sinfonia_dumpallparams(struct sinfonia_usbdev *usbh)
+{
+	int i, ret;
+	uint32_t param = 0;
+
+	for (i = 0 ; i < 256 ; i++) {
+		ret = sinfonia_getparam(usbh, i, &param);
+		if (ret)
+			continue;
+		DEBUG("%02x: %08x\n", i, param);
+	}
+	return CUPS_BACKEND_OK;
+}
+
 int sinfonia_setparam(struct sinfonia_usbdev *usbh, int target, uint32_t param)
 {
 	struct sinfonia_setparam_cmd cmd;
diff --git a/backend_sinfonia.h b/backend_sinfonia.h
index 5dc6c7a..41c42bb 100644
--- a/backend_sinfonia.h
+++ b/backend_sinfonia.h
@@ -94,6 +94,7 @@ int sinfonia_settonecurve(struct sinfonia_usbdev *usbh, int target, char *fname)
 int sinfonia_button_set(struct sinfonia_usbdev *dev, int enable);
 
 int sinfonia_query_serno(struct libusb_device_handle *dev, uint8_t endp_up, uint8_t endp_down, char *buf, int buf_len);
+int sinfonia_dumpallparams(struct sinfonia_usbdev *usbh);
 
 #define BANK_STATUS_FREE  0x00
 #define BANK_STATUS_XFER  0x01