5416489 CPU, Floppy, Printer: Program Socket? Site Type Description 23-008M1 Y E4 8051 Disk Interface 23-097K5 N E24 16R8 PAL 23-330E4 Y E33 2764 Character Generator 23-331E4 Y E42 2764 Character Generator 23-371E4 N E1 6616 2Kx8 The pc238 uses a DC381 gate array for E25, and a DC382 gate array for E30, which may make reproduction difficult. The parts 23-330E4 and 23-331E4 are interchangeable. The firmware self-identifies with different version numbers: 32H/4010 Common, no known problems. 32I/4011 Obscure version, differences unknown. The relationship of the software version to the hardware part numbers is unclear. ROM part numbers for the option cards also need to be explored.