diff --git a/env/iss/bsp_write.c b/env/iss/bsp_write.c
index a10f78e..b6c6d6d 100644
--- a/env/iss/bsp_write.c
+++ b/env/iss/bsp_write.c
@@ -5,12 +5,32 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+#include <string.h>
+
+extern volatile uint32_t tohost;
+
 ssize_t _bsp_write(int fd, const void *ptr, size_t len) {
-  const uint8_t *current = (const uint8_t *)ptr;
+
+  // char string[] = "hello world in bsp_write";
+  // uint32_t payload_1[4] = {64, 0, (uintptr_t)string, strlen(string)};
+  // tohost = (uint32_t)payload_1;
+
+  // const uint32_t *current = (const uint32_t *)ptr;
+
   if (isatty(fd)) {
-    for (size_t jj = 0; jj < len; jj++) {
-      *((uint32_t *)0xFFFF0000) = current[jj];
-    }
+    // uint32_t payload[4] = {64, 0, (uint32_t)((uint32_t *)ptr), len};
+    // tohost = (uint32_t)payload;
+
+    uint64_t payload[4] = {64, 0, (uintptr_t)((uint32_t *)ptr), len};
+    tohost = (uint32_t)payload;
+
+    /*
+    // accoring to my understading this part is used fot uart wrrite for later
+        for (size_t jj = 0; jj < len; jj++) {
+    *((uint32_t *)0xFFFF0000) = current[jj];
+  }
+    */
+
     return len;
   }