A 2 IC SRAM replacement for the Commodore 64 that offers all of the advantages of the VSP-fixed 64kB SRAM modules plus 2 megabytes of directly accessible RAM using a full featured memory management unit (MMU).
Introduction
UltiMem64 replace the 2 4464 DRAM ICs on newer Commodore 64 motherboards (and can be installed in older 8-IC 4164 DRAM based motherboards using the DRAMCarrier PCB) and provides access to 2 megabytes of direct memory access (not REU access). The memory is instantly available when requested, no DMA needed. The Color RAM IC installs in the 2114 space on motherboards containing a 2114 Color RAM and provides access to 64 kilobytes of Color memory nybbles.