Tuesday, October 25, 2016
Apple II+ RAM Replacement - Power
Replacing the RAM in my Apple II+ has become a bit of a project in and of itself. Sure I could just buy some 4116 (16 bit) DRAM, but that's not very exciting, and its not an upgrade. So, Instead, I have been figuring out how I can use 4264 (64 bit) DRAM in its place. There are a lot of considerations that need to be made including power, refresh circuit, and addressing the new RAM. The descriptions below are for an RFI Revision 01 board, and may be different for other revisions. Click below to see the details of re-routing the RAM power lines and my preliminary results.