I was wrong, it has been too long since I took a look at 8 bits assembly code, I think that it was what they called OPCODES (Instructions), and for the addresses they used Hexadecimal (A combination of: 0 1 2 3 4 5 6 7 8 9 and A B C D E F) and or Decimal (0 1 2 3 4 5 6 7 8 9), the assembler would assemble the opcode(s) instructions into machine language (Binary), I think, but I don't remember for sure, I only took a quick look at that language a very long time ago, the 8 bits assembler was not that hard to learn, but I was not very interested in it, I should had learned and Basic too along with it, I also took a quick look at Commodore 64 basic (Basic 2, I think it was), I might just take up Basic again, maybe using a C-64 emulator such as Vice, that is, if it will allow Basic programming as if it was a real C-64, I will see, other-wise it will be either GWBasic and or QuickBasic (QBasic), after all these years I am finally going  to try to learn some Basic, I could of course just start with Visual Basic, but I want to start with good old Basic.