# `move` [M68K Documentation](https://asm-editor.specy.app/documentation/m68k.md) › [Instructions](https://asm-editor.specy.app/documentation/m68k/instruction.md) Web page: https://asm-editor.specy.app/documentation/m68k/instruction/move **Move data** Category: Data movement Moves the value from the first operand to the second operand. Used in: [Bytes, words and longs](https://asm-editor.specy.app/learn/courses/m68k/introduction/bytes-words-and-longs.md) (M68K assembly), [The M68K instruction set](https://asm-editor.specy.app/learn/courses/m68k/introduction/the-m68k-instruction-set.md) (M68K assembly), [Addressing modes](https://asm-editor.specy.app/learn/courses/m68k/introduction/addressing-modes.md) (M68K assembly), [The condition code register](https://asm-editor.specy.app/learn/courses/m68k/introduction/the-condition-code-register.md) (M68K assembly), [org, equ, dc and ds](https://asm-editor.specy.app/learn/courses/m68k/introduction/org-equ-dc-and-ds.md) (M68K assembly), [Memory regions and executable files](https://asm-editor.specy.app/learn/courses/m68k/introduction/memory-regions-and-executable-files.md) (M68K assembly), [Compare and branch](https://asm-editor.specy.app/learn/courses/m68k/think-in-assembly/compare-and-branch.md) (M68K assembly), [Loops and dbra](https://asm-editor.specy.app/learn/courses/m68k/think-in-assembly/loops-and-dbra.md) (M68K assembly), [Arithmetic, logic and bits](https://asm-editor.specy.app/learn/courses/m68k/think-in-assembly/arithmetic-logic-and-bits.md) (M68K assembly), [Arrays, strings and (a0)+](https://asm-editor.specy.app/learn/courses/m68k/think-in-assembly/arrays-strings-and-postincrement.md) (M68K assembly) ## Flags | Flag | Effect | | --- | --- | | X | not changed | | N | set from the result | | Z | set from the result | | V | always 0 | | C | always 0 | ## Forms - `move , ` · Sizes .b .w .l, .w by default - Source: Dn, An, (An), (An)+, -(An), d(An), d(An,Xn), abs, d(PC), d(PC,Xn), #imm (all modes) - Destination: Dn, An, (An), (An)+, -(An), d(An), d(An,Xn), abs (alterable) - `move , ccr` · Size .w - Source: Dn, (An), (An)+, -(An), d(An), d(An,Xn), abs, d(PC), d(PC,Xn), #imm (data) - `move sr, ` · Size .w · Privileged on the 68010 and 68020 - Destination: Dn, (An), (An)+, -(An), d(An), d(An,Xn), abs (data alterable) ## Privileged These forms require supervisor mode, the mode a program starts in. In user mode they raise a privilege violation. See [user and supervisor mode](https://asm-editor.specy.app/documentation/m68k/exceptions/modes.md). - `move , sr` · Size .w - Source: Dn, (An), (An)+, -(An), d(An), d(An,Xn), abs, d(PC), d(PC,Xn), #imm (data) - `move usp, An` · Size .l - `move An, usp` · Size .l ## 68010 and later These forms are available on the 68010 and 68020. Select `opt p=68010` or `opt p=68020` before any code or data. - `move ccr, ` · Size .w - Destination: Dn, (An), (An)+, -(An), d(An), d(An,Xn), abs (data alterable) ## Operands - [``](https://asm-editor.specy.app/documentation/m68k/addressing-mode.md): An operand using one of the addressing modes listed for this form. The list determines whether it can be a register, memory or an immediate value. With `opt p=68020`, an allowed `d(An,Xn)` or `d(PC,Xn)` mode also permits the corresponding 68020 indexed and memory indirect forms. See [68020 addressing](https://asm-editor.specy.app/documentation/m68k/addressing-mode/68020.md). - [`ccr`](https://asm-editor.specy.app/documentation/m68k/addressing-mode/status-registers.md): The condition-code register: the low byte of `sr`, containing the `X`, `N`, `Z`, `V` and `C` flags. - [`sr`](https://asm-editor.specy.app/documentation/m68k/addressing-mode/status-registers.md): The 16-bit status register. Its upper byte contains system flags; its lower byte contains the condition codes. - [`usp`](https://asm-editor.specy.app/documentation/m68k/addressing-mode/user-stack-pointer.md): The user stack pointer: the `a7` a program has in user mode. Supervisor code reads and sets it through an address register, as in `move.l usp, a0`. - [`An`](https://asm-editor.specy.app/documentation/m68k/addressing-mode/direct.md): An address register, `a0` to `a7`; `sp` is another name for `a7`. - [`#imm`](https://asm-editor.specy.app/documentation/m68k/addressing-mode/immediate.md): An immediate value written after `#`: a number, character or label, such as `#10`, `#$FF` or `#'a'`. It must fit the operation’s size: byte `-128` to `255`, word `-32768` to `65535`, or long `-2147483648` to `4294967295`; signed and unsigned spellings are accepted. ## Description An address-register destination uses [movea](https://asm-editor.specy.app/documentation/m68k/instruction/movea.md). `move.l a0, usp` writes the user stack pointer, and `move.l usp, a0` reads it. Both forms require supervisor mode. See [user and supervisor mode](https://asm-editor.specy.app/documentation/m68k/exceptions/modes.md). `move.w sr, d0` copies the status register. This is allowed in user mode on the 68000, but requires supervisor mode on the 68010 and 68020. Those processors also provide `move.w ccr, d0`, which lets user code read the condition codes. ## Example ```m68k * --- Different sizes --- move.b #$FF, d0 move.w #$1234, d1 move.l #$AABBCCDD, d2 * --- Register to register --- move.l d2, d3 * --- Immediate to memory --- lea $2000, a0 move.l #$DEADBEEF, (a0) move.w #$1234, 4(a0) * --- Memory to register --- move.l (a0), d4 move.w 4(a0), d5 * --- Post-increment and pre-decrement --- lea $2000, a1 move.l (a1)+, d6 move.l #$11223344, -(a1) * --- The user stack pointer, for supervisor code only --- lea $8000, a2 move.l a2, usp ; the a7 of user mode will start at $8000 move.l usp, a3 ```