CBM II Parts

                   Low Profile B128(610)/B256(620)
                High Profile CBM128(710)/CBM256(720)


 B(6x0)   CBM(7x0)
Location  Location  Part Number  Description
U26, U58  U9, U29                2016 (2) 1K x 8 static RAM
U64-U79                          4864-2 (16) 64K x 1 dynamic RAM
U29-U36                          4864-2 (8) 64K x 1 dynamic RAM (256K)
U45-U52                          4864-2 (8) 64K x 1 dynamic RAM (256K)
          U37-U92                4864-2 (16 or 32) 64K x 1 dynamic RAM
U9        U26                    6509A CPU
U2, U28   U8, U84                6525A (2) TPI
U1        U11                    6526A CIA
U15       U7                     6551A ACIA
U10       U6                     6581 SID
U7        U10                    68B45 CRTC
U18       U75       906114-04    82S100 PLA
U18       U75       906114-05    82S100 PLA
          U41       901232-01    2332A ROM character
U25                 901237-01    2332A ROM character
U60       U13       901240-03    2364A ROM Basic 4.0 A000-BFFF (256K)
U59       U12       901241-03    2364A ROM Basic 4.0 8000-9FFF (256K)
U60       U13       901242-02    2364A ROM Basic 4.0 A000-BFFF (128K)
U59       U12       901243-02    2364A ROM Basic 4.0 8000-9FFF (128K)
U61       U17       901244-03    2364A ROM Basic 4.0 E000-FFFF
U60       U60       901240-04    8K ROM Basic 4.0r A000-BFFF (256K)
U59       U59       901241-04    8K ROM Basic 4.0r 8000-9FFF (256K)
U60       U13       901242-04    8K ROM Basic 4.0r A000-BFFF (128K)
U59       U12       901243-04    8K ROM Basic 4.0r 8000-9FFF (128K)
U61       U17       901244-04    8K ROM Basic 4.0r E000-FFFF

NOTE: -04 ROMs were not officially released.

NOTE: 906114-05 PLA is necessary for proper operation of a coprocessor.