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- Newsgroups: comp.sys.amiga.games
- Path: sparky!uunet!think.com!ames!saimiri.primate.wisc.edu!usenet.coe.montana.edu!giac1.oscs.montana.edu!osymh
- From: osymh@giac1.oscs.montana.edu (Michael L. Hitch)
- Subject: Re: Lemmings demo doesnt work!!!!
- Message-ID: <1992Nov18.151313.9040@coe.montana.edu>
- Keywords: lemmingsn
- Sender: usenet@coe.montana.edu (USENET News System)
- Organization: Montana State University, Bozeman MT
- References: <Nov.17.19.16.25.1992.4540@pilot.njin.net>
- Date: Wed, 18 Nov 1992 15:13:13 GMT
- Lines: 25
-
- In article <Nov.17.19.16.25.1992.4540@pilot.njin.net> justin@pilot.njin.net (Justin Warburton) writes:
- >I got lemm2-demo.dms from amiga.physik.unizh.ch which when umpacke rebooted
- >I got that nice title screen then a guru. I tried using nofastmem that didnt
- >work. so I went and got LemmingsII-demo.dms from hubcap.clemson.edu that
- >didnt even unpack that gave me CRC errors. I did all this on an A1000
- >w/ 512k chipram and 2 megs fastram.Please help me I want to try this!
-
- I found that it wouldn't run on my A1000 with 512K chip and 1.5M fast
- memory. I looked at the startup code in the executable and found a bug in
- the code that runs when there is only 512K chip memory. The code allocates
- 512K of fast memory to use in place of the 2nd half of 1M chip memory. The
- bad code is attempting to adjust the fast memory start/size for later
- allocation.
-
- I patched the test executable and it now runs on my A1000. The patch I
- made was to change the byte at offset 0xd5 from 0x80 to 0x81 and the byte
- at offset 0xdb from 0x40 to 0x41. [The offsets are relative to the start
- of the file; offsets from the start of the code segment are 0xb5 and 0xbb.]
-
- Michael
- --
- Michael L. Hitch BITNET: OSYMH@MTSUNIX1.BITNET
- Computer Services Consultant INTERNET: osymh@msu.oscs.montana.edu
- Office of Systems and Computing Services
- Montana State University Bozeman, MT USA
-