Add support for Super Game Boy border

Makefile

@@ -10,7 +10,7 @@ LCC = $(GBDK_HOME)bin/lcc
 TARGETS=gb pocket
 
 # Configure platform specific LCC flags here:
-LCCFLAGS_gb      = -Wl-yt0x1B # Set an MBC for banking (1B-ROM+MBC5+RAM+BATT)
+LCCFLAGS_gb      = -Wl-yt0x1B -Wm-ys # Set an MBC for banking (1B-ROM+MBC5+RAM+BATT)
 LCCFLAGS_pocket  = -Wl-yt0x1B # Usually the same as required for .gb
 LCCFLAGS_duck    = -Wl-yt0x1B # Usually the same as required for .gb
 LCCFLAGS_gbc     = -Wl-yt0x1B -Wm-yc # Same as .gb with: -Wm-yc (gb & gbc) or Wm-yC (gbc exclusive)

Makefile.targets

@@ -15,25 +15,25 @@ clean-target:
 gb-clean:
 	${MAKE} clean-target EXT=gb
 gb:
-	${MAKE} build-target PORT=gbz80 PLAT=gb EXT=gb
+	${MAKE} build-target PORT=sm83 PLAT=gb EXT=gb
 
 
 gbc-clean:
 	${MAKE} clean-target EXT=gbc
 gbc:
-	${MAKE} build-target PORT=gbz80 PLAT=gb EXT=gbc
+	${MAKE} build-target PORT=sm83 PLAT=gb EXT=gbc
 
 
 pocket-clean:
 	${MAKE} clean-target EXT=pocket
 pocket:
-	${MAKE} build-target PORT=gbz80 PLAT=ap EXT=pocket
+	${MAKE} build-target PORT=sm83 PLAT=ap EXT=pocket
 
 
 megaduck-clean:
 	${MAKE} clean-target EXT=duck
 megaduck:
-	${MAKE} build-target PORT=gbz80 PLAT=duck EXT=duck
+	${MAKE} build-target PORT=sm83 PLAT=duck EXT=duck
 
 
 sms-clean:

README.md

@@ -9,7 +9,7 @@ Download this repository and [GBDK 2020](https://github.com/gbdk-2020). Add this
 ```
 make
 ```
-Compilation last verified with GBDK 4.0.6.
+Compilation last verified with GBDK 4.1.1.
 
 ## Credits
 * Graphics and code developed by Bryant Lee