# AdvSys files have a marker string "ADVSYS" at bytes 2-7, and a 16-bit
# version number at bytes 8 and 9.  AdvSys 1.2 refuses the file if the
# version number is not 101 or 102.

# There's a minor complication with this, however.  AdvSys stores its game
# data in "complemented" format, transforming each byte from the input file 
# with new = ~(old + 30).  So, "ADVSYS" actually appears as A0 9D 8B 8E 88 8E,
# and 101 or 102 as 7B E1 or 7C E1.

engine_type="AdvSys"
engine_name="AdvSys"
engine_version="1.2"

acceptor_offset=2
acceptor_length=8
acceptor_pattern="^a0 9d 8b 8e 88 8e 7[bc] e1$"

author_name="David Betz"

builder_name="Simon Baldwin"
builder_email="simon_baldwin@yahoo.com"

engine_description=\
"ADVSYS is a special purpose programming language that was specifically
 designed to be used to write computer text adventure games.  The Glk port
 code is by Michael Chen.\n"
engine_copyright="Copyright (C) 1986 by David Betz.\n"