メインシステム空間
|
物理空間 |
|
|
6809モード論理空間 |
|
|
|
| $00000 |
標準RAM
128KB |
|
$0000 |
RAM
63KB |
|
|
|
|
|
|
|
| $10000 |
|
|
|
|
|
| $20000 |
拡張RAM
128KB
※1 |
$2000 |
|
|
|
|
| $30000 |
|
|
|
|
|
| $40000 |
拡張RAM
768KB |
$4000 |
$FC00 |
RAM
128bytes |
|
|
|
| $50000 |
$5000 |
BOOT ROM
4KB |
|
|
|
$FC80 |
共有RAM
128bytes |
| $60000 |
$6000 |
|
|
|
|
|
| $70000 |
|
$FD00 |
I/O
256bytes |
|
|
|
| $80000 |
$8000 |
|
|
|
|
| $90000 |
|
|
|
|
|
| $A0000 |
$A000 |
$FE00 |
RAM |
|
|
|
| $B0000 |
|
|
|
|
|
| $C0000 |
$C000 |
|
|
|
|
| $D0000 |
|
|
|
|
|
| $E0000 |
$E000 |
|
|
|
|
| $F0000 |
$F000 |
|
|
$FC00 |
→ |
$FFF2 |
| $FFFFF |
$FFFF |
$FFFF |
VECTOR 14bytes |
| ※1：BS/AD2+では標準RAM |
|
ディスプレイサブシステム空間
|
|
| $0000 |
GVRAM
32KB
×6 |
|
|
|
|
|
|
|
|
| $2000 |
|
|
|
| $4000 |
|
|
|
| $6000 |
|
|
|
| $8000 |
CVRAM |
|
|
| $9000 |
RAM |
| $9F80 |
共有RAM |
| $A000 |
I/O |
|
| $B000 |
拡張モニタROM
4KB
|
|
| $C000 |
キャラクタROM |
| $C800 |
CRTモニタROM
14KB |
|
|
| $E000 |
|
|
|
| $FFFF |
|
|