1551 Parts

Location       Part Number     Description
U4             318008-01       23128 ROM DOS 2.6 C000-FFFF
U5                             6116 2K x 8 Static RAM
U6                             HD61J215P 42 pin Gate Array
U7             251829-01       64H157 20 pin Gate Array
U2                             6510T CPU
U3                             6525A TPI
U11            251853-01       R/W Hybrid

Interface Cartridge:
U2                             6523 Tri-Port Interface
U1             251641-03       82S100 PLA