Motorola MPC564EVB Manuel d'utilisateur télécharger pdf (Page 58)

3-8 MPC564EVB User’s Manual

Commands

ASM Assembler

Usage: ASM <<addr> stmt>

The ASM command is a primitive assembler. The <stmt> is assembled and the resulting code

placed at <addr>. This command has an interactive and non-interactive mode of operation.

The value for address <addr> may be an absolute address specified as a hexadecimal value, or a

symbol name. The value for stmt must be valid assembler mnemonics for the CPU.

For the interactive mode, the user enters the command and the optional <addr>. If the address is

not specified, then the last address is used. The memory contents at the address are disassembled,

and the user prompted for the new assembly. If valid, the new assembly is placed into memory, and

the address incremented accordingly. If the assembly is not valid, then memory is not modified,

and an error message produced. In either case, memory is disassembled and the process repeats.

The user may press the <Enter> or <Return> key to accept the current memory contents and skip

to the next instruction, or a enter period to quit the interactive mode.

In the non-interactive mode, the user specifies the address and the assembly statement on the

command line. The statement is the assembled, and if valid, placed into memory, otherwise an error

message is produced.

Examples:

To place a NOP instruction at address 0x0001_0000, the command is:

asm 10000 nop

To interactively assembly memory at address 0x0040_0000, the command is:

asm 400000

Frees

cale Semiconductor,

Freescale Semiconductor, Inc.

For More Information On This Product,

Go to: www.freescale.com

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Motorola MPC564EVB Manuel d'utilisateur Page 58