Best/Worst Assembly Language Instruction Set

i develope only three things with the ARM, its really interessting. A stopwatch, calculator and a chipreader is my creation with it.

i use hitop:

 

What? No 6809???

I'm surprised no one has mentioned the 6809. I think the only semi-popular machine this chip was ever put in was the Radio Shack CoCo. But the chip was really fun to program, cause at the time, no chip had as rich an instruction set (at least, no chip that normal people could get their hands on). Among other projects, I wrote a multi-tasking Forth compiler for the thing, and they actually paid me to do it.

 

My only experience with the 6809 was my Percom floppy drive for the Atari - it uses a 6809 processor. I looked at the CoCo in '82, but went with an Atari 400 instead.

My prefs for ISA:
680x0
PowerPC
MIPS
ARM
SuperH
Z80
6809
6502
x86

Pretty much anything RISC will be better in my opinion, with only the 680x0 of the CISC processors scoring higher.