Memory Space For Each Bus Mode - Fujitsu F2MC-16LX Hardware Manual

6.1.3

Memory Space for Each Bus Mode

This section describes the correspondence between access areas and physical
addresses, depending on the specified bus mode.
■ Memory Space for Each Bus Mode
As shown in Figure 6.1-2, the ROM image of an FF bank can be seen in high-order bits of a 00
bank. This makes the small model of the C compiler effective. Low-order 16 bits are designed
to provide the same effect so that tables in the ROM can be referenced without "far"
specification in pointer declaration.
For example, if 00C000
the ROM area in the FF bank exceeds 48K bytes, the entire image of the FF bank cannot be
stored in the 00 bank. Therefore, ROM data in FF4000
in 004000
area from FF4000
See "CHAPTER 22 ROM MIRROR FUNCTION SELECTION MODULE" when ROM without the
mirror function is selected.
is accessed, the ROM contents in FFC000
H
to 00FFFF , and so it is recommended that the ROM data table be stored in the
H H
to FFFFFF .
H H
6.1 Memory Access Mode Overview
are accessed. Because
H
to FFFFFF can be seen in the image
H H
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