If I use this opcode
JMP
Jump to New Location
(PC+1) -> PCL
(PC+2) -> PCH
N Z C I D V
- - - - - -
addressing assembler opc bytes cycles
absolute JMP oper 4C 3 3
and give it a hex value of say 0x0604 will it jump to that location execute what's there and then continue until it gets back to the JMP statement, or will it execute whats at 0x0604 and then do the next instruction after the JMP
A JMP $0604 instruction will change the program counter to the value $0604 and then start executing the instructions starting at address $0604. It will not return back to the instruction after the JMP. To accomplish that you need to change the JMP to a JSR, and make sure the subroutine code at $604 has an RTS instruction to return from the subroutine.