I fixed the broken links to this on my website.
This has the theory of operation and a schematic
of the KIM-4 expansion board.

Try http://www.learnmicros.com/kim-4.html

For a much more visually accurate version, there's
the rather big (11 MB!) PDF of the same:
http://www.learnmicros.com/kim-4.pdf ...

I see there are other folks here interested in writing
a cycle-accurate simulator for 6502. Me too.

First, does anyone know of a "stand alone" (not infested
with Windoze calls or graphics) 6502 simulator
written in "C" that would be a good candidate for
stripping off a user interface and using as ...

I've developed a very small bootstrap monitor for the 6502which listens for an Intel Hex download from the serialport (6551) and fills memory as it downloads programsor data at 19200,n,8,1. At this speed, most program downloads go pretty fast.I stuffed a copy of this at:http://www.shortwaveplanet ...

All signed arithmetic on the 6502, including
relative branch calculations, are Two's Complement.

I don't have an assembler handy to prove this, but

vaguely remember than an offset of 0 means the
instruction following the end of the branch statement,
because the PC has already incremented to point ...

Just some general ramblings,

Your idea seems very reasonable for a first effort.
Have you seen Grant Searle's UK101 replicomp
project off the www.6502.org website? It's very
close to what you're talking about doing, and would get
you going with a real OS and I/O and known good software
for a simple ...

I have a KIM-1 I want to bring back to life, and advice is sought.
Any KIM-o-philes out there?

Problem #1:
I applied +5 and +12, and everything came to life. Keypad has
some bounces / flakiness (the "0" key is awful, PC key is dead,
rest are pretty good.)
Although I'd love to find a genuine ...