Quote:
Originally Posted by ross
Just to get along 
You're both right, simply the 6502 if it had a 16-bit bus would access the memory at twice the speed of 68k.
But since we are in the real world, the 6502 actually reads the same data at (if it ever existed) same speed.
 |
Sigh. People are taking this too personally. I am only interested in comparing the bus interface timing here. No that one CPU is better than the other. Why can’t people ever take what I say in the context I say it...
I was simply pointing out that the 6502 could access RAM faster. It can! That is fact. It has a narrower bus so it’s overall memory throughput is the same. And because the instruction architecture is different the amount of data you can move with a cpu is lower.. I never disputed this.
My point is that if the 68000 had used the same mechanism for its bus interface it would have been way better. It’s my lasting frustration with that chip.
It is my opinion that only getting 0.5mips from 8Mhz is poor given the rest of the hardware in the machine.