[comp.sys.atari.st] Hardware knowledge request

DDP100@PSUVM.BITNET (05/09/89)

     What requirements (both hardware and software) are there for
adding a hard drive to my 520 ST?

     Also, has anyone personally soldered (piggybacked) ram chips
on the ST?  What has to be done and how safe is it?

     Finally, How can I interface a 720k drive to my 360k drive?

     Thanks for any help.

      DDP100@psuvm.bitnet
    or ddp@psuecl.bitnet