Circuit details for the internal 512K RAM upgrade
Posted: Wed Feb 14, 2018 9:01 am
Hi - Does anyone have any circuit details for the internal 512K dynamic RAM upgrade that was done with piggy back 256K DRAM chips?
Specifically I am after the bit that drives CAS and multiplexes the aditional address pin on the dram chips...
Specifically I am after the bit that drives CAS and multiplexes the aditional address pin on the dram chips...