Path: utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!rutgers!ucsd!ucsdhub!hp-sdd!ncr-sd!crash!pnet01!sreeb From: sreeb@pnet01.cts.com (Ed Beers) Newsgroups: comp.sys.atari.st Subject: Re: A scheme for updating/patching gemdos Message-ID: <3377@crash.cts.com> Date: 30 Aug 88 04:36:10 GMT Sender: news@crash.cts.com Organization: People-Net [pnet01], El Cajon CA Lines: 12 After reading lots of messages on the merits of using the 0xAxxx ***RESERVED*** instruction trap, I have to add my 2 cents. Using the 0xAXXX or 0xFXXX traps is bad news. It limits compatibility with future 68000 family products. Apple atleast avoided using the 0xFXXX trap which is why they have had 68881 support for sometime while we still only have somewhat kludged, semi-supported floating point support much less a 68020/68030 version of the ST. If you want to have pointers for each routine, it wouldn't add many instructions to use a legal trap and vector in software. UUCP: {cbosgd hplabs!hp-sdd sdcsvax nosc}!crash!pnet01!sreeb ARPA: crash!pnet01!sreeb@nosc.mil INET: sreeb@pnet01.cts.com