English Amiga Board - View Single Post - PAL Amiga 500: Can I use a NTSC (US) Power Supply?

AmigaHope · 22 January 2021, 06:14

There is a slight difference in CPU speed between NTSC and PAL A500 too, with PAL being slightly slower. It usually does not come into play as nothing written for NTSC pushes the limits enough to not run on a PAL system, and the speed difference is usually not enough to screw up timing on most PAL stuff.

The only problems I've run into came from forcing PAL/NTSC mode via hardware jumper on a dual-mode system. When you do it via software, the OS adjusts the timings to match the oscillator in the system, but when you make the change via hardware jumper it then assumes you have the other oscillator.

Either way, an ECS agnus will let you have the best of both worlds instead of having to swap between NTSC and PAL systems.

22 January 2021, 06:14	#8
AmigaHope Registered User Join Date: Sep 2006 Location: New Sandusky Posts: 942	There is a slight difference in CPU speed between NTSC and PAL A500 too, with PAL being slightly slower. It usually does not come into play as nothing written for NTSC pushes the limits enough to not run on a PAL system, and the speed difference is usually not enough to screw up timing on most PAL stuff. The only problems I've run into came from forcing PAL/NTSC mode via hardware jumper on a dual-mode system. When you do it via software, the OS adjusts the timings to match the oscillator in the system, but when you make the change via hardware jumper it then assumes you have the other oscillator. Either way, an ECS agnus will let you have the best of both worlds instead of having to swap between NTSC and PAL systems.