Register A4 in the 68000 can be used as a stack pointer. 68000 assembler directi
ID: 1716046 • Letter: R
Question
Register A4 in the 68000 can be used as a stack pointer. 68000 assembler directives are handled internally by the assembler. Two's complement number format has two different representations for the number zero the 68000's JMP instruction causes a return address to be pushed onto the system stack IEEE floating-point format has a specific representation for infinity Execution of the 68000's CMP instruction does not alter the destination register or memory the 68000's N flag is found in the Program Counter (PC) register. 68000 longword operations to memory require addresses exactly divisible by four. In the 68000's LEA instruction, the destination must be a data register. the 68000 processor can directly address up to 32 MBytes of external memory.Explanation / Answer
(a) F (false)
because in 68000 one active stack pointer exists it is called as A7.
(b) T(true)
because the assembler maintains a program counter type of register called an address counter.
(c) F (false)
(d) T (true)
(e) T (true)
(f) T (true)
(g) F (false)
(h) F (false)
(i) F (false)
because the destination must be an address register
(j) T (true)