Changes
/* Custom Chips */
40057 Spectrum +2 ASIC (ULA1050E - Joystick)
40058 Spectrum +2 ASIC
40077 Spectrum +2A/+2B/+3 ASIC
40078 PC1512 character ROM (with Greek characters)
40087 PCW9xxx printer controller ASIC
40092 Spectrum +3 /+2B/+3B ROM 1 (English; 256K) 40093 Spectrum +3 /+2B/+3B ROM 2 (English; 256K)
40100 PC1640 EGA ROM
40107 PPC512 BIOS (even addresses)