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Chapter 18. H8/500 Dependent Features

18.2.3. Addressing Modes

as understands the following addressing modes for the H8/500:

Rn

Register direct

@Rn

Register indirect

@(d:8, Rn)

Register indirect with 8 bit signed displacement

@(d:16, Rn)

Register indirect with 16 bit signed displacement

@ Rn

Register indirect with pre decrement

@Rn+

Register indirect with post increment

@aa:8

8 bit absolute address

@aa:16

16 bit absolute address

#xx:8

8 bit immediate

#xx:16

16 bit immediate

18.3. Floating Point

The H8/500 family has no hardware floating point, but the

.float

directive generates ieee floating 

point numbers for compatibility with other development tools.

18.4. H8/500 Machine Directives

as

has no machine dependent directives for the H8/500. However, on this platform the

.int

and

.word

directives generate 16 bit numbers.