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RES (Reserve Uninitialized Memory)

The RES directive reserves a block of memory for uninitialized data.

See also DATA.B (Reserve Initialized Memory).

Syntax:

The RES directive requires a constant expression argument. A label is optional.

RES const_expr

label RES const_expr

The const_expr argument designates the number of bytes to reserve as an

uninitialized data block.

Although the allocated data is uninitialized, the Neuron Chip’s and Smart

Transceiver’s system firmware always clears all RAM to zero as part of the

power-up sequence. Thus, RAM variables do need not to be explicitly initialized

to zero.

Example:

The following example reserves space for a two-byte global variable in the

RAMFAR segment:

SEG RAMFAR

ORG

APEXP %globalVar

%globalVar RES d’2

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