beautypg.com

Figure 42. expanded i/o address space (16-bit dec – Intel 386 User Manual

Page 55

background image

Intel386™ EX EMBEDDED MICROPROCESSOR USER’S MANUAL

4-4

(See Figure 4-2.) Thus, each slot has 1 Kbyte addresses (in four 256-byte segments) that can po-
tentially contain extended peripheral registers.

Figure 4-2. Expanded I/O Address Space (16-bit Decode)

General Slot I/O

Slot 15

FFFFH (64K)

FC00H (63K)

General Slot I/O

Slot 15

F800H (62K)

General Slot I/O

Slot 15

F400H (61K)

General Slot I/O

Slot 15

F000H (60K)

1FFFH (8K)

General Slot I/O

Slot 1

1C00H (7K)

General Slot I/O

Slot 1

1800H (6K)

General Slot I/O

Slot 1

1400H (5K)

General Slot I/O

Slot 1

1000H (4K)

General Slot I/O

Slot 0

0C00H (3K)

General Slot I/O

Slot 0

0800H (2K)

General Slot I/O

Slot 0

0400H (1K)

General Slot I/O

Slot 0

0000H (0K)

A2499-02

ISA Platform I/O