IBM 2274 - Manual (Page 43)

General Information 9
Parallel port Supports SPP (IBM PC/XT, PC/AT,
PS/2) compatible, EPP (IEEE 1284
compliance), ECP (IEEE 1284
compliance) interface.
IEEE 1284 compliant
Game port Game port interface for joystick. It
also supports MIDI.
USB Supports Universal UHCI
Specification for USB 1.1
Item Interface