342-0133-A

Video Character Generator ROM chip used in unenhanced Apple IIe and Apple IIc computer systems - Purpose: This chip serves as the character generator, responsible for storing the font and character set displayed on the screen.
Compatibility: It is specifically the US-NTSC version of the video ROM.
Chip Type: It is typically a 24-pin, 4KB (2732 series) ROM.
System Role: In the unenhanced Apple IIe, this chip is part of the standard motherboard configuration. When users performed the "Enhanced" upgrade to their systems, this chip was replaced with part number 342-0265-A to enable "MouseText" characters and other graphical improvements