Hi Matt,

today SRAM up to 512kBytes easy available (e.g. HM628512).

DRAM can not be direct connected to the 8051.
You need always a DRAM controller and address multiplexers.

How about using micro controllers with Z80 core ?
The Z80 support DRAM refresh, so I think the micro controllers too.

Also, if data must be altered not often, how about Atmels
serial data flash (up to 4MByte) ?


Regards,

Peter