Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!ucsd!ucbvax!VMD.CSO.UIUC.EDU!FREE0066
From: FREE0066@VMD.CSO.UIUC.EDU (Scott Alfter)
Newsgroups: comp.sys.apple2
Subject: 6502 Startup Process
Message-ID: <9005021814.AA27026@garcon.cso.uiuc.edu>
Date: 2 May 90 18:02:38 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
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I have a 6502 lying around now from when I put an enhancement kit in my IIe,
and I was thinking of possibly putting it to use outside the Apple--maybe as
a calculator that does logic functions or something.  (It would be handy for
someone like me who does lots of machine-level work, and no, a 6502 would not
be improperly used in a calculator--look at what Hewlett-Packard does with
the 6502 and (more recently) the 65816.)  There's only one problem I can think
of--how does the thing start up?

Every day for the past five years I've taken the 6502's startup process pretty
much for granted when it throws "Apple ][" (or more recently, "Apple //e")
across the top of the monitor and starts loading a DOS in from the drive.  How
does the processor get to that point, though?  I know what ROM routines are
responsible for the boot process, but how does the 65(C)02 know where those
routines are, and how does it call them?  I don't think this is something the
_Apple_IIe_Technical_Reference_Manual_ covers, as it is not a IIe-specific
thing, but is related more to the processor than anything else.

Scott Alfter-------------------------------------------------------------------
  Bitnet: free0066@uiucvmd             _/_ Apple II: the power to be your best!
Internet: alfter@mrcnext.cso.uiuc.edu / v 
          cs122aw@ux1.cso.uiuc.edu   (    (             A keyboard--how quaint!
          saa33413@uxa.cso.uiuc.edu   _^_/                    --M. Scott, STIV