Specifications Memory - 2
Memory
RAM
Perf 550, 560: 4 MB of dynamic RAM on board
Perf 575, 577: 5 MB of dynamic RAM on board
Perf 578: 8 MB of dynamic RAM on board
Expandable to 36 MB (80 ns or faster SIMMs)
72-pin DRAM SIMM connector
ROM
1 MB of ROM
PRAM
256 bytes of clock/calendar/parameter memory
Long-life lithium battery