diff --git a/Makefile b/Makefile
index bb3c7a8..acff00c 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ endif
 CC65	?=	$(TREES)/cc65/bin
 APPLE2E	?=	$(TREES)/apple2e/apple2e
 
-CPU     =       6502
+CPU     =       65C02
 ROM	= 	apple2a.rom
 LIB	=	apple2rom.lib
 
@@ -16,9 +16,14 @@ CC65_FLAGS = -t none --cpu $(CPU) --register-vars
 $(ROM): a.out
 	(dd count=5 bs=4096 if=/dev/zero 2> /dev/null; cat a.out) > $(ROM)
 
+.PHONY: run
 run: $(ROM)
 	$(APPLE2E) -mute -map main.map $(ROM)
 
+.PHONY: debug
+debug: $(ROM)
+	lldb -- $(APPLE2E) -mute -map main.map $(ROM)
+
 a.out: main.o interrupt.o vectors.o exporter.o platform.o runtime.o apple2rom.cfg $(LIB)
 	$(CC65)/ld65 -C apple2rom.cfg -m main.map --dbgfile main.dbg interrupt.o vectors.o exporter.o platform.o runtime.o main.o $(LIB)
 	awk -f rom_usage.awk < main.map
diff --git a/README.md b/README.md
index 7889472..9fe3532 100644
--- a/README.md
+++ b/README.md
@@ -7,11 +7,11 @@ Runs between 5 and 30 times faster.
 Supported features: The classic way to enter programs with
 line numbers, 16-bit integer variables, `HOME`, `PRINT`, `IF/THEN`,
 `FOR/NEXT`, `GOTO`, low-res graphics (`GR`, `PLOT`, `COLOR=`, `TEXT`),
-`DIM` (arrays), `POKE`, and integer and boolean arithmetic.
+`DIM` (single-dimensional arrays), `POKE`, and integer and boolean arithmetic.
 
 Not supported: Floating point, strings,
 high-res graphics, `DATA/READ/RESUME`, `GOSUB/RETURN/POP`,
-`REM`, keyboard input, exponentiation (`A^B`), and cassette I/O.
+`REM`, multi-dimensional arrays, keyboard input, exponentiation (`A^B`), and cassette I/O.
 
 # Dependencies