Table of Contents
Advertisement
MB96300 Super Series Hardware Manual
Table 32.2-2 description of Mirror size select bits MS[1:0]
MI
SZ1
SZ0
1
1
1
Note:
Do not write the ROM mirroring register (ROMM) when code is executed from addresses inside the mirrored
memory area.
FF.FFFF
FF.8000
FF.0000
01.FFFF
01.8000
01.0000
00.FFFF
00.8000
00.1000
00.0000
mirrored
ROM/RAM-
Size
32k
ROM
RAM
0k
Figure 32.2-1 example for ROM-Mirroring function
default
ROM
RAM
32k-ROM-Mirror
28k-RAM
IO-area
CHAPTER 32 ROM/RAM MIRRORING MODULE
selected ROM/RAM-area
for mirroring
(physical address)
Fx.8000
- Fx.FFFF
H
H
no RAM-Mirroring
ROMM:SZ[1:0]='01';
ROMM:BS='1111'
ROM
FF.C000
01.C000
RAM
16k-ROM-Mirror
00.C000
16k-RAM-Mirror
28k-RAM
IO-area
ROM/RAM-mirrored to
area
(logical address)
00.8000
- 00.FFFF
H
H
no RAM-Mirroring
ROM-area from
FF.C000
-FF.FFFF
H
H
mirrored to
00.C000
-00.FFFF
H
H
RAM-area from
01.8000
-01.BFFF
H
H
mirrored to
00.8000
-00.FFFF
H
H
835
Advertisement
Table of Contents
