251913 BASIC/KERNAL

BASIC 901226 and KERNAL 901227 combined

CMOS 16KiB ROM, based on MOS 23128 ROM

PCB ASSY NO. usage:

250469

Pinout

          +-----\/-----+
    Vcc --|01        28|-- Vcc
    A12 --|02        27|-- Vcc
     A7 --|03        26|-- A13
     A6 --|04        25|-- A8
     A5 --|05        24|-- A9
     A4 --|06        23|-- A11
     A3 --|07        22|-- CS_l
     A2 --|08        21|-- A10
     A1 --|09        20|-- Vss/GND
     A0 --|10        19|-- D7
     D0 --|11        18|-- D6
     D1 --|12        17|-- D5
     D2 --|13        16|-- D4
Vss/GND --|14        15|-- D3
          +------------+

Contains the Commodore 64 BASIC interpreter (corresponding to the 8KiB 2364 ROM chip 901226) and the Commodore 64 KERNAL (corresponding to the 8KiB 2364 ROM chip 901227) in that order.

Also used in some versions of the Commodore 128.