beautypg.com

Pointers, I/o address spaces, Able – Zilog Z80380 User Manual

Page 37: I/o m, Achine, Nstructions

background image

UM004001-COR1103

2–3

C-Compiler Overview

pointers

POINTERS

A pointer to a qualified memory type can not be converted to a different qualified memory
type.

S

IZE

OF

P

OINTERS

Pointers are always 32-bits in size for the 380 C-compiler .

I/O ADDRESS SPACES

The compiler automatically generates the appropriate I/O instructions for accessing data in
the __INTIO and __EXTIO memory spaces. The machine instructions are described in
Table 2-1.

T

ABLE

2-1. I/O M

ACHINE

I

NSTRUCTIONS

Action

__EXTIO

__INTIO

Load

IN/INA/INAW

IN0

Store

OUT/OUTA/OUTAW

OUT0

See also other documents in the category Zilog Sensors: