grayd@jove.cs.pdx.edu (David R. Gray) (09/15/89)
Hi! I'm new to the net. I have this burning desire to upgrade my 520 ST to 1 meg. I understand that I need to piggyback the RAM, and am willing to wield a soldering iron. I have heard that I need to jumper some lines from the MMU, but don't know which ones. Could anyone help me on this? Are there other things I should be aware of? Any comments will be greatly appreciated. On a different but related topic: does anyone know where I can locate schematics to the 520? Or are these considered proprietary to Atari? I figure if I am going to hack around with the board I should know what it is. I haven't seen anything in my local Atari shop. Thank you in advance for any comments you might have. David Gray