English Amiga Board - View Single Post - Real-world difference between bus speeds

grond · 17 December 2018, 14:49

Well, it is an oversimplification because some programs may have a stupid approach and set pixels individually which may lead to working directly with planar graphics which would be very slow. This would be faster with ZII than AGA. However, the important factors here are that AGA has twice the bus speed as ZII due to the 32 bit bus (if I'm not very much mistaken) and that chunky2planar conversion can be hidden pretty much in the copying of the buffer to chip memory (even more so if AGA had as slow a bandwidth as ZII).

17 December 2018, 14:49	#18
grond Registered User Join Date: Jun 2015 Location: Germany Posts: 1,920	Well, it is an oversimplification because some programs may have a stupid approach and set pixels individually which may lead to working directly with planar graphics which would be very slow. This would be faster with ZII than AGA. However, the important factors here are that AGA has twice the bus speed as ZII due to the 32 bit bus (if I'm not very much mistaken) and that chunky2planar conversion can be hidden pretty much in the copying of the buffer to chip memory (even more so if AGA had as slow a bandwidth as ZII).