Path: utzoo!utgpu!news-server.csri.toronto.edu!mailrus!cs.utexas.edu!uwm.edu!ux1.cso.uiuc.edu!ux1.cso.uiuc.edu!uxa.cso.uiuc.edu!wogg0743
From: wogg0743@uxa.cso.uiuc.edu
Newsgroups: comp.sys.apple2
Subject: Re: 6502 Startup Process
Message-ID: <139800008@uxa.cso.uiuc.edu>
Date: 4 May 90 00:16:00 GMT
Lines: 11
Nf-ID: #R:<9005021814.AA27026@garcon.cso.u:-40:uxa.cso.uiuc.edu:139800008:000:596
Nf-From: uxa.cso.uiuc.edu!wogg0743    May  3 19:16:00 1990


You have to rig it so when the power comes on, the processor gets a
RESET (you bring high the reset line, I think).  You could do this
simply by providing yourself with a button that completes a circuit
(thus giving you a reset button into the bargain, but also making this
part of the manditory start-up process) or else rig a more complicated
circuit to do this once ever time the power comes on (like Apple uses)

The other half of it is that you have to use a ROM at the top of memory
to hold the interupt vectors (including the one for reset).  Point the
reset vector to your startup code.