Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!zaphod.mps.ohio-state.edu!think!mintaka!ogicse!blake!ridges
From: ridges@blake.acs.washington.edu (ryan ridges)
Newsgroups: comp.sys.handhelds
Subject: Re: Tank Battle for HP28s
Message-ID: <5856@blake.acs.washington.edu>
Date: 20 Feb 90 23:18:17 GMT
References: <5764@blake.acs.washington.edu>
Reply-To: ridges@blake.acs.washington.edu (ryan ridges)
Organization: University of Washington, Seattle
Lines: 16


Pete Ashdown noticed that MOVBUL calls SPRITE, which was not included in the 
Tank Battle program listings.  If you replace SPRITE with SPRITE2 in MOVBUL
the game will still run, but things won't be quite as lovely.  SPRITE 
is basically a non-destructive version of SPRITE2 -- shape data is ORed with 
existing screen data so the background shows through.  Here's the listing for 
SPRITE:

SPRITE  [5C74]
<< C->R -> SHP X Y << SHP 1 GET SHP 2 GET -> W H << 32 Y - 8 / IP -> BR << 0 
H FOR I LCD-> DUP I BR + 137 * X + -> OF << 1 OF 1 - SUB SWAP OF OF W + SUB 
SHP I 3 + GET OR + ->LCD >> NEXT >> >> >> >>

Coming next: COKE -- faster animation through caffeine

ryan ridges