Create README.md

Author: infval

README.md

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+# StrikeLZSS
+LZSS compressor & decompressor for *Desert Strike*, *Jungle Strike*, *Urban Strike* (Sega Mega Drive/Genesis).
+## Usage
+### Editing ROM
+Apply master code:
+```
+Desert Strike - 0FFFC4:4E71
+Jungle Strike - 1FF2E0:4E75
+ Urban Strike - 1FF0D4:4E75
+```
+### Searching compressed art
+Set the execution (PC) breakpoint at:
+```
+Desert Strike - $006112
+Jungle Strike - $04619C
+ Urban Strike - $00762A
+```
+When execution stops, register `A2` contains the offset in the ROM.
+### Program usage
+Decompress:
+```
+StrikeLZSS -d input.bin output.bin -p 0x12AB
+```
+-p OFFSET - the starting position in the input file (hex - 0xAB or dec - 171).
+
+Compress:
+```
+StrikeLZSS input.bin output.bin
+```