CHICKEN (c) 2008-2013, The Chicken Team (c) 2000-2007, Felix L. Winkelmann Version 4.8.2 windows-mingw32-x86 [ manyargs dload ptables ] compiled 06.04.2013 on RIVO-PC (MinGW) #;1> (define p (##sys#make-pointer)) #;2> (##sys#set-pointer-address! p -1) #;3> p # #;4> (##sys#pointer->address p) 4294967295. #;5> (eq? -1 (##sys#pointer->address p)) #f #;6> (eq? #xffffffff (##sys#pointer->address p)) #f