EP1200 Hack Assembly / Machine Language

Machine Language, Assembly, Assembler

Assembly is a symbolic representation of machine language instructions, which is in binary representation. The assembler translates assembly into machine language.

Is this command valid? D=!D;JEQ

Yes

A, D, PC registers. and “M”.

A-register stores a 16-bit value, typically used as a memory address or constant.

D-register stores a 16-bit value.
PC-register stores (15-bit) the address of the next instruction in ROM.

M refers to RAM[A].

RAM, ROM, Registers, ALU, PC

RAM = data memory

ROM = instructions memory (given, can’t be changed / read-only)

Registers = PC, A,D (M refers to register whose address is stored in A-register)

ALU = processing various functions

stored program concept

 

The program is stored in the memory like the data, and can be manipulated.

CPU?

includes the ALU, registers, and a logic to decode instructions.