Motorola MVME2600 Series User Manual download pdf (Page 320)

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101

Source Program Coding

4-10

An ASCII string which contains spaces may not be used as an

argument to the WORD directive, even if the string is enclosed

inside single quotes. In this case, the mm command may be used in

place of the assembler's WORD directive. Note that to use mm, the

one-line assembler must be exited.

The following example illustrates the Assembler Error which will

occur if the user attempts to enter a string containing spaces using

the WORD directive. Following the error is an example of the use

of the mm command to put the string into memory instead.

PPC1-Bug>as 80000

user enters WORD 'abcd', which works Þne

00080000 61626364 ORI R2,R11,$6364

user enters WORD 'ab d', which is invalid

00080004 00000000 WORD $00000000? WORD 'ab d'

Assembler Error: Operand Conversion

exit the one-line assembler

00080004 00000000 WORD $00000000? .

use mm command instead

PPC1-Bug>mm 80004

00080004 00000000? 'ab d'

00080008 00000000? .

verify this using md command

PPC1-Bug>md 80000:4

00080000 61626364 61622064 00000000 00000000 abcdab d........

SYSCALL System Call Directive

The function of this directive is to aid you in making the

appropriate system call entry to the debugger system call routines.

The format for this directive is:

SYSCALL <.ROUTINE>

This is assembled as:

ADDI R10,R0,

$XXXX

Where

$XXXX

is the 16-bit code for the system call routine.

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Motorola MVME2600 Series User Manual Page 320

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