There are so many 6502 assemblers. Here's a few: https://web.archive.org/web/20151021054219/http://hoop-la.ca/apple2/#assembler https://web.archive.org/web/2015

There are so many 6502 assemblers. Here's a few: https://web.archive.org/web/20151021054219/http://hoop-la.ca/apple2/#assembler https://web.archive.org/web/20151021054219/http://hoop-la.ca... There are so many, I don't even know which "tass" you are asking about. 64tass? https://sourceforge.net/projects/tass64/ https://sourceforge.net/projects/tass64/ 64tass looks really good as it supports 6502, 65C02, R65C02, W65C02, 65CE02, 65816, DTV, 65EL02, 4510. I use Merlin32 which supports 65816, but I pretty much stick to 6502. I do use xa from time to time. Others have mentioned ca65 which is popular and can support macros and lots of other things that make it incompatible with other assemblers. Advantages for no 6502 assembler in particular because there are so many available! * compatibility, ease of use, ease of install, ease of building from source, portability, size, speed, lack of dependencies, vintage, hack-ability, written in $MY_PROGRAMMING_LANGUAGE ...