Changes
/* Custom Chips */
40051 32K ROM; BIOS and BASIC for CPC6128 (French)
40054 32K ROM; Spectrum +2
40056 Spectrum +2 ASIC (ULA7K010E5 - main ULA)
40057 Spectrum +2 ASIC (ULA1050E - Joystick)
40058 Spectrum +2 ASIC
40077 Spectrum +3 ASIC
