diff --git a/Makefile b/Makefile
index 5a62825..f0ebac8 100644
--- a/Makefile
+++ b/Makefile
@@ -18,9 +18,11 @@ ELFFILE   := $(BINDIR)/core.elf
 LOGFILE   := $(BINDIR)/core.log
 
 VERBOSE   := false
+#ARCH     := m1284p
 ARCH      := m32
-#FREQ     := 7372800UL
+#FREQ     := 18432000UL
 FREQ      := 8000000UL
+#MCU      := atmega1284p
 MCU       := atmega32a
 ASP       := usbasp
 CC        := avr-gcc
@@ -34,14 +36,14 @@ CPPFLAGS  := -DF_CPU=$(FREQ) -I$(SRCDIR)
 CFLAGS    := -mmcu=$(MCU) -Os -std=c99 -Wall -Wextra -Werror
 OCFLAGS   := -j .text -j .data -O ihex
 LDFLAGS   := -mmcu=$(MCU) -Wl,-u,vfprintf -lprintf_flt
-LDLIBS    :=
+LDLIBS    := -lm
 
 # ==============================================================================
 # TARGET FILE LISTS (DERIVED FROM SOURCE TREE)
 # ==============================================================================
 
 PATHS     := $(shell find "$(SRCDIR)" -type d -printf '%P ' 2>/dev/null)
-FILES     := $(shell find "$(SRCDIR)" -type f -name "*.c"  -printf '%P ' 2>/dev/null)
+FILES     := $(shell find "$(SRCDIR)" -type f -name "*.c" -printf '%P ' 2>/dev/null)
 TMPDIRS   := $(BINDIR) $(TMPDIR) $(PATHS:%=$(TMPDIR)/%)
 OBJECTS   := $(FILES:%.c=$(TMPDIR)/%.o)
 DEPENDS   := $(FILES:%.c=$(TMPDIR)/%.d)