1540/1541/1541A/SX-64 Parts

Location       Part Number    Description
                              2016 2K x 8 bit Static RAM (short board)
UA2-UB3                       2114 (4) 1K x 4 bit Static RAM (long board)
               325572-01      64H105 40 pin Gate Array (short board)
               325302-01      2364-130 ROM DOS 2.6 C000-DFFF
               325303-01      2364-131 ROM DOS 2.6 (1540) E000-FFFF
               901229-01      2364-173 ROM DOS 2.6 rev. 0 E000-FFFF
               901229-03      2364-197 ROM DOS 2.6 rev. 1 E000-FFFF
               901229-05      8K ROM DOS 2.6 rev. 2 E000-FFFF
                              6502 CPU
                              6522 (2) VIA
drive                         Alps DFB111M25A
drive                         Alps FDM2111-B2
drive                         Newtronics D500

1541B/1541C Parts

Location       Part Number    Description
UA3                           2016 2K x 8 bit Static RAM
UC2                           6502 CPU
UC1, UC3                      6522 (2) CIA
UC4            251828-02      64H156 42 pin Gate Array
UC5            251829-01      64H157 20 pin Gate Array
UD1          * 251853-01      R/W Hybrid
UD1          * 251853-02      R/W Hybrid
UA2            251968-01      27128 EPROM DOS 2.6 rev. 3 C000-FFFF
drive                         Newtronics D500
  * Not interchangeable.

1541-II Parts

Location       Part Number    Description
U5                            2016-15 2K x 8 bit Static RAM
U12                           SONY CX20185 R/W Amp.
U3                            6502A CPU
U6, U8                        6522 (2) CIA
U10            251828-01      64H156 40 pin Gate Array
U4             251968-03      16K ROM DOS 2.6 rev. 4 C000-FFFF
drive                         Chinon FZ-501M REV A
drive                         Digital System DS-50F
drive                         Newtronics D500
drive                         Safronic DS-50F