diff --git a/BaS_GNU/BaS_GNU/Makefile b/BaS_GNU/BaS_GNU/Makefile
index 44c5489..bc9c77a 100644
--- a/BaS_GNU/BaS_GNU/Makefile
+++ b/BaS_GNU/BaS_GNU/Makefile
@@ -16,6 +16,7 @@ TCPREFIX=m68k-atari-mint-
 
 CC=$(TCPREFIX)gcc
 LD=$(TCPREFIX)ld
+CPP=$(TCPREFIX)cpp
 
 INCLUDE=-Iinclude
 CFLAGS=-mcpu=5474 -Wall -Wno-multichar -Os -fomit-frame-pointer
@@ -25,10 +26,9 @@ OBJDIR=objs
 
 MAPFILE=bas.map
 
-# Linker control files. flash.lk is meant for BaS in flash, ram.lk (not written yet) for
-# debugging in RAM.
-LDCFILE=flash.lk
-# LDCFILE=ram.lk
+# Linker control file.
+LDCFILE=bas.lk
+LDCSRC=bas.lk.S
 
 EXEC=bas.s19
 
@@ -57,11 +57,17 @@ OBJS=$(COBJS) $(AOBJS)
 .PHONY all: $(EXEC)
 
 .PHONY clean:
-	@ rm -f $(EXEC) $(STRT_OBJ) $(OBJS) $(MAPFILE) depend
-	
-$(EXEC): $(STRT_OBJ) $(OBJS) $(LDCFILE)
-	$(LD) --oformat srec -Map $(MAPFILE) --cref -T flash.lk -s -o $@ 
+	@ rm -f $(EXEC) $(STRT_OBJ) $(OBJS) $(MAPFILE) $(LDCFILE) depend 
 
+	
+$(EXEC): $(STRT_OBJ) $(OBJS) $(LDCSRC)
+	$(CPP) -P -DTARGET_ADDRESS=0xe0000000 $(LDCSRC) -o $(LDCFILE)
+	$(LD) --oformat srec -Map $(MAPFILE) --cref -T $(LDCFILE) -s -o $@ 
+
+ram: $(STRT_OBJ) $(OBJS) $(LDCSRC)
+	$(CPP) -P -DTARGET_ADDRESS=0x01000000 $(LDCSRC) -o $(LDCFILE)
+	$(LD) --oformat srec -Map $(MAPFILE) --cref -T $(LDCFILE) -s -o $@.s19
+	
 # compile init_fpga with -mbitfield for testing purposes
 $(OBJDIR)/init_fpga.o:	CFLAGS += -mbitfield
 
diff --git a/BaS_GNU/BaS_GNU/bas.lk.S b/BaS_GNU/BaS_GNU/bas.lk.S
new file mode 100644
index 0000000..41f4503
--- /dev/null
+++ b/BaS_GNU/BaS_GNU/bas.lk.S
@@ -0,0 +1,86 @@
+MEMORY {
+   flash (RX)  : ORIGIN = TARGET_ADDRESS, LENGTH = 0x00200000
+   ram (WX) : ORIGIN = 0x1FE00000, LENGTH = 0x00100000		/* target to copy BaS to */
+}
+
+SECTIONS {
+	_Bas_base = ABSOLUTE(0x1FE00000);
+	_tos_base = ABSOLUTE(0xe00000);
+	 
+	/* Init CS0 (BootFLASH @ E000_0000 - E07F_FFFF 8Mbytes) */
+	___BOOT_FLASH           = ABSOLUTE(TARGET_ADDRESS);
+ 	___BOOT_FLASH_SIZE      = ABSOLUTE(0x00800000);
+	/* SDRAM Initialization @ 0000_0000 - 1FFF_FFFF 512Mbytes */
+ 	___SDRAM                = ABSOLUTE(0x00000000);
+ 	___SDRAM_SIZE           = ABSOLUTE(0x20000000);
+
+	/* VIDEO RAM BASIS */
+	__VRAM                = ABSOLUTE(0x60000000);
+
+	/* Memory mapped registers */
+ 	__MBAR                 = ABSOLUTE(0xFF000000);
+ 	__MMUBAR               = ABSOLUTE(0xFF040000);
+
+	/*
+	 * 4KB on-chip Core SRAM0: -> exception table and exception stack
+	 */
+ 	__RAMBAR0              = ABSOLUTE(0xFF100000);
+ 	__RAMBAR0_SIZE         = ABSOLUTE(0x00001000);
+
+ 	__SUP_SP = ABSOLUTE(__RAMBAR0 + __RAMBAR0_SIZE - 4);
+
+	/* 4KB on-chip Core SRAM1: -> modified code */
+ 	__RAMBAR1              = ABSOLUTE(0xFF101000);
+ 	__RAMBAR1_SIZE         = ABSOLUTE(0x00001000);
+
+	/* system variables */
+	
+	/* RAMBAR0 0 to 0x7FF -> exception vectors */
+	_rt_mod    = __RAMBAR0 + 0x800;
+	_rt_ssp    = __RAMBAR0 + 0x804;
+	_rt_usp    = __RAMBAR0 + 0x808;
+	_rt_vbr    = __RAMBAR0 + 0x80C;  	/* (8)01 */
+	_rt_cacr   = __RAMBAR0 + 0x810;   	/* 002 */
+	_rt_asid   = __RAMBAR0 + 0x814;   	/* 003 */
+	_rt_acr0   = __RAMBAR0 + 0x818;   	/* 004 */
+	_rt_acr1   = __RAMBAR0 + 0x81c;   	/* 005 */
+	_rt_acr2   = __RAMBAR0 + 0x820;   	/* 006 */
+	_rt_acr3   = __RAMBAR0 + 0x824;   	/* 007 */
+	_rt_mmubar = __RAMBAR0 + 0x828;		/* 008 */
+	_rt_sr     = __RAMBAR0 + 0x82c;
+	_d0_save   = __RAMBAR0 + 0x830;
+	_a7_save   = __RAMBAR0 + 0x834;
+	_video_tlb = __RAMBAR0 + 0x838;
+	_video_sbt = __RAMBAR0 + 0x83C;
+	_rt_mbar   = __RAMBAR0 + 0x844;   	/* (c)0f */
+
+	/* 32KB on-chip System SRAM */
+ 	__SYS_SRAM             = ABSOLUTE(0xFF010000);
+	__SYS_SRAM_SIZE        = ABSOLUTE(0x00008000);
+
+	.code ___BOOT_FLASH : 
+	{
+		objs/startcf.o
+	} > flash
+	
+	.text :
+	{
+		objs/sysinit.o(.text)
+		objs/init_fpga.o(.text)
+		objs/sd_card.o(.text)
+		objs/cache.o(.text)
+		objs/mmu.o(.text)
+		objs/exceptions.o(.text)
+		objs/supervisor.o(.text)
+		objs/ewf.o(.text)
+		objs/illegal_instruction.o(.text)
+		_bas = .;
+	} > flash
+
+	.bas _Bas_base : AT (ADDR(.text) + SIZEOF(.text))
+	{
+		objs/BaS.o(.text)
+		_bas_end = ABSOLUTE(.);
+	} > ram
+	
+}
\ No newline at end of file