PowerBook 100.pdf - Apple Collection

Specifications Memory - 2
Memory
RAM
2 MB of 100 ns pseudostatic RAM (PSRAM) standard, expandable
to 8 MB
ROM
256K (two 128K by 8-bit devices); 150 ns access time;
addressing supports up to 4 MB
PRAM
128 bytes of parameter memory
VRAM
32K of pseudostatic video display memory
Clock/Calendar
CMOS custom chip with long-life lithium battery