diff --git a/.gitignore b/.gitignore
index 9b430b5..aadf46c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,7 @@ bin/blockgen/.vs/
 *.user
 bin/blockgen/vcxproj/.vs/
 bin/blockgen/vcxproj/x64/
+*.pdb
+bin/overlayhelper/.vs/
+bin/overlayhelper/vcxproj/.vs/
+bin/overlayhelper/vcxproj/x64/
diff --git a/Makefile b/Makefile
index 32b042e..a15260e 100644
--- a/Makefile
+++ b/Makefile
@@ -29,7 +29,8 @@ F256         = $(HOME)/code/f256
 #SYSLIBDIR   = $(SYSTEM)/lib
 #SYSINCDIR   = $(SYSTEM)/include
 
-TMPFLAGS	= -D F256=1 -include src/mapper.h -include blocks.h -Wno-unknown-pragmas
+#TMPFLAGS	= -D F256=1 -include src/mapper.h -include blocks.h -Wno-unknown-pragmas
+TMPFLAGS	= -D F256=1 -include src/mapper.h -Wno-unknown-pragmas
 
 
 INCCMD		=	-I$(SYSINCDIR)
diff --git a/lib/i256.flib b/lib/i256.flib
new file mode 100644
index 0000000..de369c4
Binary files /dev/null and b/lib/i256.flib differ
diff --git a/rickjr.ld b/rickjr.ld
index ebfab73..b9eca9d 100644
--- a/rickjr.ld
+++ b/rickjr.ld
@@ -34,22 +34,22 @@ MEMORY {
 }
 
 /* LMAs */
-__block8_lma	= 0x08000000|__SLOT_ADDR;
-__block9_lma	= 0x09000000|__SLOT_ADDR;
-__block10_lma	= 0x0A000000|__SLOT_ADDR;
-__block11_lma	= 0x0B000000|__SLOT_ADDR;
-__block12_lma	= 0x0C000000|__SLOT_ADDR;
-__block13_lma	= 0x0D000000|__SLOT_ADDR;
-__block14_lma	= 0x0E000000|__SLOT_ADDR;
-__block15_lma	= 0x0F000000|__SLOT_ADDR;
-__block16_lma	= 0x10000000|__SLOT_ADDR;
-__block17_lma	= 0x11000000|__SLOT_ADDR;
-__block18_lma	= 0x12000000|__SLOT_ADDR;
-__block19_lma	= 0x13000000|__SLOT_ADDR;
-__block20_lma	= 0x14000000|__SLOT_ADDR;
-__block21_lma	= 0x15000000|__SLOT_ADDR;
-__block22_lma	= 0x16000000|__SLOT_ADDR;
-__block23_lma	= 0x17000000|__SLOT_ADDR;
+__block8_lma	= ( 8<<24)|__SLOT_ADDR;
+__block9_lma	= ( 9<<24)|__SLOT_ADDR;
+__block10_lma	= (10<<24)|__SLOT_ADDR;
+__block11_lma	= (11<<24)|__SLOT_ADDR;
+__block12_lma	= (12<<24)|__SLOT_ADDR;
+__block13_lma	= (13<<24)|__SLOT_ADDR;
+__block14_lma	= (14<<24)|__SLOT_ADDR;
+__block15_lma	= (15<<24)|__SLOT_ADDR;
+__block16_lma	= (16<<24)|__SLOT_ADDR;
+__block17_lma	= (17<<24)|__SLOT_ADDR;
+__block18_lma	= (18<<24)|__SLOT_ADDR;
+__block19_lma	= (19<<24)|__SLOT_ADDR;
+__block20_lma	= (20<<24)|__SLOT_ADDR;
+__block21_lma	= (21<<24)|__SLOT_ADDR;
+__block22_lma	= (22<<24)|__SLOT_ADDR;
+__block23_lma	= (23<<24)|__SLOT_ADDR;
 
 /* Stash preloaded binary data */
 __binarydata_lma  = 0x70000;  /* At least now, its less than 64k */
@@ -107,6 +107,9 @@ SECTIONS {
   .block23    : { *(.block23    .block23.*)    } >block23  end_block23 = .;
 }
 
+/* Trick linker into exposing symbols with values larger than 16 bits */
+INCLUDE overlay.ld
+
 /* OUTPUT_FORMAT { FULL(cart_rom) } */
 OUTPUT_FORMAT {
   BYTE(0x5A)    /* pgZ */
@@ -140,10 +143,17 @@ OUTPUT_FORMAT {
   BYTE(0x00)
   TRIM(block10)
 
+/* block11 */
+  SHORT(11*0x2000)
+  BYTE(11/8)            /* block#/8 = the actual system high byte */ 
+  SHORT(end_block11 - __block11_lma)
+  BYTE(0x00)
+  TRIM(block11)
+
+
 /*
   Empty Blocks are not allowed, bring these in as you use them
 
-  TRIM(block11)
   TRIM(block12)
   TRIM(block13)
   TRIM(block14)
diff --git a/src/dat_spritesJR.c b/src/dat_spritesJR.c
index b4aef5b..686e10c 100644
--- a/src/dat_spritesJR.c
+++ b/src/dat_spritesJR.c
@@ -15,6 +15,7 @@
 
 #ifdef GFXF256
 
+// $$TODO - move this macro into it's own header
 #define STR2(x) #x
 #define STR(x) STR2(x)
 
@@ -48,6 +49,8 @@ INCBIN(".binarydata.haf", haf_256, "data/haf.256");
 // Congrats
 INCBIN(".binarydata.haf", congrats_256, "data/congrats.256");
 
+INCBIN(".block11.i256", i256lib, "lib/i256.flib");
+
 #endif /* GFXF256 */
 
 /* eof */
diff --git a/src/mapper.h b/src/mapper.h
index afcfd7c..6352635 100644
--- a/src/mapper.h
+++ b/src/mapper.h
@@ -24,6 +24,6 @@ $$JGA TODO, sort out how to mark an entire file
 #define CODE_BLOCK(index)
 #define DATA_BLOCK(index)
 
-#define PAGEIN(_function_)
+#define PAGEIN(_function_BLOCK)
 
 #endif
diff --git a/src/scr_credit.c b/src/scr_credit.c
index 4fa4c07..5ad8ffa 100644
--- a/src/scr_credit.c
+++ b/src/scr_credit.c
@@ -14,10 +14,11 @@ segment "screen";
 
 extern char credits_lz4;
 extern char incbin_sprites_256_start[];
+extern char incbin_sprites_256_start_high[];
 extern char incbin_tiles_256_start[];
 extern char incbin_splash_256_start[];
 extern char __block23_lma_high[];
-
+extern char scr_credit_BLOCK[];
 
 CODE_BLOCK(8) void scr_credit()
 {
@@ -25,8 +26,8 @@ CODE_BLOCK(8) void scr_credit()
 	//$$JGA TODO - fix this
 	*((char*)0x200) = (char)(((long)(&incbin_sprites_256_start)));
 	*((char*)0x201) = (char)(((long)(&incbin_sprites_256_start))>>8);
-	*((char*)0x202) = incbin_sprites_256_start_high;
-	*((char*)0x203) = scr_credit_BLOCK;
+	*((char*)0x202) = (char)(((long)(&incbin_sprites_256_start_high)));
+	*((char*)0x203) = (char)(((long)(&scr_credit_BLOCK)));
 //	*((char*)0x203) = (char)(((long)(__block23_lma_high))>>8);
 #endif