diff --git a/armsrc/appmain.c b/armsrc/appmain.c
index 6955a55d3..d0d996770 100644
--- a/armsrc/appmain.c
+++ b/armsrc/appmain.c
@@ -80,10 +80,11 @@ void send_wtx(uint16_t wtx) {
 
 static void umm_test(void) {
 
+    umm_info(NULL, true);
     uint8_t* dest = (uint8_t*)umm_malloc(2000);    
     umm_free(dest);
     dest = (uint8_t*)umm_malloc(12000);  
-    umm_info(dest, false);
+    umm_info(dest, true);
     umm_free(dest);
 }
 
diff --git a/armsrc/dbprint.h b/armsrc/dbprint.h
index 2172040dc..19b848c60 100644
--- a/armsrc/dbprint.h
+++ b/armsrc/dbprint.h
@@ -14,6 +14,8 @@
 #include "common.h"
 #include "ansi.h"
 
+#define NOLF "\xff"
+
 #define Dbprintf_usb(...) {\
         bool tmpfpc = g_reply_via_fpc;\
         bool tmpusb = g_reply_via_usb;\
@@ -52,25 +54,46 @@ void print_result(const char *name, uint8_t *buf, size_t len);
 
 // Functions for umm_malloc
 // Alternatively, use https://github.com/rhempel/c-helper-macros/blob/develop/dbglog/dbglog.h
-#define DBGLOG_FORCE(...) {\
-    Dbprintf (__VA_ARGS__); \
+
+#define DBGLOGS_FORCE(force, format) {\
+    if (force) Dbprintf (format NOLF); \
     }
 
-#define DBGLOG_ERROR(...) {\
-    if (DBGLEVEL >= DBG_ERROR) Dbprintf (__VA_ARGS__); \
+#define DBGLOG_FORCE(force, format, ...) {\
+    if (force) Dbprintf (format NOLF, __VA_ARGS__); \
     }
 
-#define DBGLOG_CRITICAL(...) {\
-    if (DBGLEVEL >= DBG_ERROR) Dbprintf (__VA_ARGS__); \
+#define DBGLOGS_ERROR(format) {\
+    if (DBGLEVEL >= DBG_ERROR) Dbprintf (format NOLF); \
     }
 
-#define DBGLOG_DEBUG(...) {\
-    if (DBGLEVEL >= DBG_DEBUG) Dbprintf (__VA_ARGS__); \
+#define DBGLOG_ERROR(format, ...) {\
+    if (DBGLEVEL >= DBG_ERROR) Dbprintf (format NOLF, __VA_ARGS__); \
     }
 
-#define DBGLOG_TRACE(...) {\
-    if (DBGLEVEL >= DBG_EXTENDED) Dbprintf (__VA_ARGS__); \
+#define DBGLOGS_CRITICAL(format) {\
+    if (DBGLEVEL >= DBG_ERROR) Dbprintf (format NOLF); \
     }
 
-#define DBGLOG_32_BIT_PTR(...) __VA_ARGS__
+#define DBGLOG_CRITICAL(format, ...) {\
+    if (DBGLEVEL >= DBG_ERROR) Dbprintf (format NOLF, __VA_ARGS__); \
+    }
+
+#define DBGLOGS_DEBUG(format) {\
+    if (DBGLEVEL >= DBG_DEBUG) Dbprintf (format NOLF); \
+    }
+
+#define DBGLOG_DEBUG(format, ...) {\
+    if (DBGLEVEL >= DBG_DEBUG) Dbprintf (format NOLF, __VA_ARGS__); \
+    }
+
+#define DBGLOGS_TRACE(format) {\
+    if (DBGLEVEL >= DBG_EXTENDED) Dbprintf (format NOLF); \
+    }
+
+#define DBGLOG_TRACE(format, ...) {\
+    if (DBGLEVEL >= DBG_EXTENDED) Dbprintf (format NOLF, __VA_ARGS__); \
+    }
+
+#define DBGLOG_32_BIT_PTR(ptr) (ptr)
 #endif
diff --git a/armsrc/umm_info.c b/armsrc/umm_info.c
index 93fe375e5..d852665b6 100644
--- a/armsrc/umm_info.c
+++ b/armsrc/umm_info.c
@@ -3,7 +3,7 @@
 #include <stddef.h>
 #include <stdbool.h>
 
-#include <math.h>
+//#include <math.h>
 #ifdef UMM_INFO
 
 /* ----------------------------------------------------------------------------
@@ -40,8 +40,8 @@ void *umm_info( void *ptr, bool force ) {
    */
   memset( &ummHeapInfo, 0, sizeof( ummHeapInfo ) );
 
-  DBGLOG_FORCE( force, "\n" );
-  DBGLOG_FORCE( force, "+----------+-------+--------+--------+-------+--------+--------+\n" );
+  DBGLOGS_FORCE( force, "\n" );
+  DBGLOGS_FORCE( force, "+----------+-------+--------+--------+-------+--------+--------+\n" );
   DBGLOG_FORCE( force, "|0x%08x|B %5i|NB %5i|PB %5i|Z %5i|NF %5i|PF %5i|\n",
       DBGLOG_32_BIT_PTR(&UMM_BLOCK(blockNo)),
       blockNo,
@@ -125,7 +125,7 @@ void *umm_info( void *ptr, bool force ) {
       UMM_NFREE(blockNo),
       UMM_PFREE(blockNo) );
 
-  DBGLOG_FORCE( force, "+----------+-------+--------+--------+-------+--------+--------+\n" );
+  DBGLOGS_FORCE( force, "+----------+-------+--------+--------+-------+--------+--------+\n" );
 
   DBGLOG_FORCE( force, "Total Entries %5i    Used Entries %5i    Free Entries %5i\n",
       ummHeapInfo.totalEntries,
@@ -137,12 +137,12 @@ void *umm_info( void *ptr, bool force ) {
       ummHeapInfo.usedBlocks,
       ummHeapInfo.freeBlocks  );
 
-  DBGLOG_FORCE( force, "+--------------------------------------------------------------+\n" );
+  DBGLOGS_FORCE( force, "+--------------------------------------------------------------+\n" );
 
   DBGLOG_FORCE( force, "Usage Metric:               %5i\n", umm_usage_metric());
   DBGLOG_FORCE( force, "Fragmentation Metric:       %5i\n", umm_fragmentation_metric());
 
-  DBGLOG_FORCE( force, "+--------------------------------------------------------------+\n" );
+  DBGLOGS_FORCE( force, "+--------------------------------------------------------------+\n" );
 
   /* Release the critical section... */
   UMM_CRITICAL_EXIT();
@@ -168,12 +168,20 @@ int umm_usage_metric( void ) {
   return (int)((ummHeapInfo.usedBlocks * 100)/(ummHeapInfo.freeBlocks));
 }
 
+static uint32_t sqrt(uint32_t x) {
+    double n=x;
+    while((n*n-x>0.0001)||(n*n-x<-0.0001)){
+        n=(n+x/n)/2;
+    }
+    return (uint32_t)n;
+}
+
 int umm_fragmentation_metric( void ) {
   DBGLOG_DEBUG( "freeBlocks %i freeBlocksSquared %i\n", ummHeapInfo.freeBlocks, ummHeapInfo.freeBlocksSquared);
   if (0 == ummHeapInfo.freeBlocks) {
       return 0;
   } else {
-      return (100 - (((uint32_t)(sqrtf(ummHeapInfo.freeBlocksSquared)) * 100)/(ummHeapInfo.freeBlocks)));
+      return (100 - ((sqrt(ummHeapInfo.freeBlocksSquared) * 100)/(ummHeapInfo.freeBlocks)));
   }
 }
 
diff --git a/armsrc/umm_malloc.c b/armsrc/umm_malloc.c
index 8aa302c1c..454d1316e 100644
--- a/armsrc/umm_malloc.c
+++ b/armsrc/umm_malloc.c
@@ -185,7 +185,7 @@ static void umm_assimilate_up( uint16_t c ) {
      * the free list
      */
 
-    DBGLOG_DEBUG( "Assimilate up to next block, which is FREE\n" );
+    DBGLOGS_DEBUG( "Assimilate up to next block, which is FREE\n" );
 
     /* Disconnect the next block from the FREE list */
 
@@ -315,7 +315,7 @@ static void umm_free_core( void *ptr ) {
 
   if( UMM_NBLOCK(UMM_PBLOCK(c)) & UMM_FREELIST_MASK ) {
 
-    DBGLOG_DEBUG( "Assimilate down to previous block, which is FREE\n" );
+    DBGLOGS_DEBUG( "Assimilate down to previous block, which is FREE\n" );
 
     c = umm_assimilate_down(c, UMM_FREELIST_MASK);
   } else {
@@ -325,7 +325,7 @@ static void umm_free_core( void *ptr ) {
      */
     UMM_FRAGMENTATION_METRIC_ADD(c);
 
-    DBGLOG_DEBUG( "Just add to head of free list\n" );
+    DBGLOGS_DEBUG( "Just add to head of free list\n" );
 
     UMM_PFREE(UMM_NFREE(0)) = c;
     UMM_NFREE(c)            = UMM_NFREE(0);
@@ -347,7 +347,7 @@ void umm_free( void *ptr ) {
   /* If we're being asked to free a NULL pointer, well that's just silly! */
 
   if( (void *)0 == ptr ) {
-    DBGLOG_DEBUG( "free a null pointer -> do nothing\n" );
+    DBGLOGS_DEBUG( "free a null pointer -> do nothing\n" );
 
     return;
   }
@@ -492,7 +492,7 @@ void *umm_malloc( size_t size ) {
    */
 
   if( 0 == size ) {
-    DBGLOG_DEBUG( "malloc a block of 0 bytes -> do nothing\n" );
+    DBGLOGS_DEBUG( "malloc a block of 0 bytes -> do nothing\n" );
 
     return( ptr );
   }
@@ -534,7 +534,7 @@ void *umm_realloc( void *ptr, size_t size ) {
    */
 
   if( ((void *)NULL == ptr) ) {
-    DBGLOG_DEBUG( "realloc the NULL pointer - call malloc()\n" );
+    DBGLOGS_DEBUG( "realloc the NULL pointer - call malloc()\n" );
 
     return( umm_malloc(size) );
   }
@@ -546,7 +546,7 @@ void *umm_realloc( void *ptr, size_t size ) {
    */
 
   if( 0 == size ) {
-    DBGLOG_DEBUG( "realloc to 0 size, just free the block\n" );
+    DBGLOGS_DEBUG( "realloc to 0 size, just free the block\n" );
 
     umm_free( ptr );