The NTSC version of Turbo-Basic XL 1.5 in not functionally different from the PAL version. The contains the following adaptations - Change the "READY" prompt to "Turbo" - Change background color during loading to normal editor blue instead of red-brown - Change the TIME and TIME$ statements to work with 60Hz instead of 50Hz File differences ================ Name of change PAL Offset in file: Bytes NTSC Offset in file: Bytes Change background color during loading to normal editor blue instead of red-brown AF: A9 10 8D C6 02 AF: A9 94 8D C6 02 Change "READY" message to "Turbo" 1C38: 59 44 41 45 52 YDAER 1C38: 6F 62 72 75 54 obroT Change computation factors for TIME$ (50/60 Hz) 4235: 04 32 00 4235: 05 18 40 Match found at: FB6F (ba r FB6F L3) Change computation routine for TIME (50/60 Hz) 426B: 20 F2 FB 20 EC FB ;FR1=FR1*50 426B: 20 13 FC EA EA EA ;FR1=FR1*60 s 2000 LE000 20 13 FC EA EA EA Match found at: FBA5 (b FBA5) MUL10 FBEC: 06 E0 LFBEC ASL FR1 FR1=(FR1*2)+(FR1*2*4) = FR1*10 FBEE: 26 E1 ROL $E1 FBF0: 26 E2 ROL $E2 MUL5 FBF2: A4 E2 LDY $E2 ; FR1=FR1+FR1*4 = FR1*5 FBF4: A5 E0 LDA FR1 FBF6: A6 E1 LFBF6 LDX $E1 FBF8: 06 E0 ASL FR1 FBFA: 26 E1 ROL $E1 FBFC: 26 E2 ROL $E2 FBFE: 06 E0 ASL FR1 FC00: 26 E1 ROL $E1 FC02: 26 E2 ROL $E2 FC04: 65 E0 ADC FR1 FC06: 85 E0 STA FR1 FC08: 8A TXA FC09: 65 E1 ADC $E1 FC0B: 85 E1 STA $E1 FC0D: 98 TYA FC0E: 65 E2 ADC $E2 FC10: 85 E2 STA $E2 FC12: 60 RTS MUL60 FC13: 20 EC FB LFC13 JSR $FBEC ;JSR MUL10 MUL6 FC16: A4 E2 LDY $E2 ;FR1=(FR1+FR1*2)*2=FR1*6 FC18: A5 E0 LDA FR1 FC1A: A6 E1 LDX $E1 FC1C: 06 E0 ASL FR1 FC1E: 26 E1 ROL $E1 FC20: 26 E2 ROL $E2 FC22: 65 E0 ADC FR1 FC24: 85 E0 STA FR1 FC26: 8A TXA FC27: 65 E1 ADC $E1 FC29: 85 E1 STA $E1 FC2B: 98 TYA FC2C: 65 E2 ADC $E2 FC2E: 06 E0 ASL FR1 FC30: 26 E1 ROL $E1 FC32: 2A ROL FC33: 85 E2 STA $E2 FC35: 60 RTS