I've 'inherited' a custom board (with schems and datasheets etc, thank
God!). I've never done any embedded work at all really and I've been
having a play with this, with a little success.

What I have a is a custom bootloader (S-Record, no source) and a RAM
loader tool for the board. As I understand it, I basically set the
board to Bootstrap and the RAM loader is a set of Bootstrap Records
which setup some basic functionality like Chip Selects etc. We then
load in our Bootloader S-Record which then has lots of fancy options
for doing things like turning on the LCD screen, printing test
patterns, poking memory addresses etc. It also has an option to run
code from a memory location that you give it.

By adding Bootstrap Record lines to the RAM Loader, I've managed to do
things like switch the LCD backlight on, switch the LCD display on and
even display a pattern on the screen. Using Easy68K, I've written some
ASM that performs the exact same operations as my Bootstrap Records
(change THIS register to THIS value). This code runs fine in the
Simulator and all the memory addresses are changed as I'd expect. When
I run it on the board itself, it just hangs. I'm not sure whether (for
example) I need to include a STOP or RTS at the end of the code to
complete operation or a jump back to the memory address of the
original code.

Basically, I'm looking for any ideas about the above as well as any
recommendations for books, online tutorials, code examples (especially
code written for the Motorola MC68VZ328 ADS dev board) and just any
pointers and tips at all to help a complete newbie get started!!

Replies to email or the board will be fine. Thanks in advance for any
help/support I get!!