the ps1 has a whole BOARD dedicated solely to power, while the mobo is mainly the same size as the psONE main mobo.
the power board is the huge brown board
the power board COULD be bypassed, only that the on/ off/ reset buttons would have to be re-wired.
also the controller port board is much bigger.
also the cd drive uses a ribbon that is identical to the kind found in most $12.99 cd walkmen. and those drives are much smaller.
if you hack at most of it, you could prolly make a legitamate sized portable.
here are some photos i took of my hacked open ps1 that i plan on portablizing.
i diddnt take the RF shield off because i dont quite have all the materials yet, and dont plan on embarking on this untill i have everything i need, and detailed instructions.






