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System Memory Map
4-3
System Memory Map
Address
Size
Waits
Function
Chip Ram (ROM after reset and before first 8520
access)
$000000-$f FFFFE
32
Alice
$200000-SA7FFFE
16
0
SA80000-SB7FFFE
16
0
SB80000-SB87FFE
32
0
SB88000-SBFFFFE
16
0
SB90000-SB9FFFF
16
Alice
8BAOOOO-SBDFFFE
16
0
SBE0000-SBEFFFE
16
0
8BF0000-SBFCFFE
16
8520
SBFDrOO
16
8520
$BFDr02-$BFDrFC
16
8520
SBFDrFE
16
8520
SBFErOO
16
8520
SBFEr02-SBFDrFC
16
8520
$BFErFE
16
8520
SBFFOOO-SBFFFFE
16
8520
8C00000-SCFFFFE
16
Alice
SD00000-SDEFFFE
16
0
SDF0000-SDFFFFE
16
Alice
SE00000-SE7FFFF
16
0
SE80000-SF7FFFE
16
0
SF80000-SFFFFFE
16
0
AUTOCONFIG Space
ROM (Reserved)
Akiko Registers
Reserved
Amiga
Chip
registers
Reserved
Reserved
Illegal 8520 access/unsupported
8520A legal decode for 8520 A register r
Illegal space that may or may not hit 8520A
8520A legal decode for 8520 A register r
85206 legal decode for 8520 B register r
Illegal space that may or may not hit 8520B
8520B legal decode for 8520 B register r
Illegal 8520 access/unsupported
Illegal (Hits RGAs for compatibility with old ROMs)
Reserved
RGA The one true location
for
Amiga
Chips
ROM
Reserved
ROM
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