In the IIe, you have 4 ROMs: two 2764s that hold BASIC, the monitor, the mini-assembler, and the 80-columm video routines (UE8 covers $C100-$DFFF and UE10 covers $E000-$FFFF), a 2732 that serves as the character generator (UF4), and a 2716 that is used as part of the keyboard decoder (UE12).