diff --git a/src/target/armv4_5.c b/src/target/armv4_5.c
index 6c30acc46..30aeb43bb 100644
--- a/src/target/armv4_5.c
+++ b/src/target/armv4_5.c
@@ -1355,6 +1355,8 @@ int armv4_5_run_algorithm_inner(struct target *target,
 	cpsr = buf_get_u32(arm->cpsr->value, 0, 32);
 
 	for (i = 0; i < num_mem_params; i++) {
+		if (mem_params[i].direction == PARAM_IN)
+			continue;
 		retval = target_write_buffer(target, mem_params[i].address, mem_params[i].size,
 				mem_params[i].value);
 		if (retval != ERROR_OK)
diff --git a/src/target/armv7m.c b/src/target/armv7m.c
index ecca0e752..ef00b9427 100644
--- a/src/target/armv7m.c
+++ b/src/target/armv7m.c
@@ -379,7 +379,8 @@ int armv7m_start_algorithm(struct target *target,
 	}
 
 	for (int i = 0; i < num_mem_params; i++) {
-		/* TODO: Write only out params */
+		if (mem_params[i].direction == PARAM_IN)
+			continue;
 		retval = target_write_buffer(target, mem_params[i].address,
 				mem_params[i].size,
 				mem_params[i].value);
diff --git a/src/target/dsp563xx.c b/src/target/dsp563xx.c
index e7306d2e4..899161694 100644
--- a/src/target/dsp563xx.c
+++ b/src/target/dsp563xx.c
@@ -1387,6 +1387,8 @@ static int dsp563xx_run_algorithm(struct target *target,
 	}
 
 	for (i = 0; i < num_mem_params; i++) {
+		if (mem_params[i].direction == PARAM_IN)
+			continue;
 		retval = target_write_buffer(target, mem_params[i].address,
 				mem_params[i].size, mem_params[i].value);
 		if (retval != ERROR_OK)
diff --git a/src/target/mips32.c b/src/target/mips32.c
index abb425596..9ac2507a3 100644
--- a/src/target/mips32.c
+++ b/src/target/mips32.c
@@ -461,6 +461,8 @@ int mips32_run_algorithm(struct target *target, int num_mem_params,
 	}
 
 	for (int i = 0; i < num_mem_params; i++) {
+		if (mem_params[i].direction == PARAM_IN)
+			continue;
 		retval = target_write_buffer(target, mem_params[i].address,
 				mem_params[i].size, mem_params[i].value);
 		if (retval != ERROR_OK)
diff --git a/src/target/stm8.c b/src/target/stm8.c
index f5df2481a..b62ff131d 100644
--- a/src/target/stm8.c
+++ b/src/target/stm8.c
@@ -1890,6 +1890,8 @@ static int stm8_run_algorithm(struct target *target, int num_mem_params,
 	}
 
 	for (int i = 0; i < num_mem_params; i++) {
+		if (mem_params[i].direction == PARAM_IN)
+			continue;
 		retval = target_write_buffer(target, mem_params[i].address,
 				mem_params[i].size, mem_params[i].value);
 		if (retval != ERROR_OK)