Armadillo-9
hardware manual ver.1.02
Each virtual area can be used as follows.
8bit virtual area
8-bit access using data bus (D7 - D0)
16bit virtual area
8-bit access to odd numbered addresses using data bus (D15 - D8)
8-bit access to even numbered addresses using data bus (D7 - D0)
16-bit access using data bus (D15 - D0)
Accessing the physical areas can be accomplished as follows:
8(16)bit Base A Physical Area offset Address
+0x0
+0x1
+0x2
+0x3
+0x4
+0x5
D0
D7
+0x0
+0x2
+0x4
D0
D7
+0x1
+0x3
+0x5
D8
D15
+0x0
+0x2
+0x4
D0
D7
D8
D15
:
:
:
:
8bit Base Address
16bit Base Address
16bit Base Address
8bit Physical Area Access
16bit Physical Area 8bit Access
16bit Physical Area 16bit Access
+0x0
+0x1
+0x2
+0x3
+0x4
+0x5
+0x6
+0x7
:
Physical Area
8bit Virtual Area
16bit Virtual Area
16bit Virtual Area
Figure 5-3 Method to Access PC/104 Bus
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