8088单板机地址映射表
| 内存类型 | 段地址:偏移地址范围 | 物理地址范围 | 容量 |
|---|---|---|---|
| RAM | 0000:0000 - 0000:7FFF | 00000H - 07FFFH | 32 KB |
| ROM | F000:0000 - F000:FFFF | F0000H - FFFFFH | 64 KB |
8088单板机端口地址表
| 代号 | 地址线 A19...A12 | 地址线 A11 A10 A9 A8 | 地址线 A7...A0 | 端口地址 |
|---|---|---|---|---|
| CS_LED | X...X | X 0 0 0 | X...X | 000H |
| CS_232 | X...X | X 0 0 1 | X...X | 100H-107H (A2 A1 A0片内寻址) |
| CS_8255 | X...X | X 0 1 0 | X...X | 200H-203H (A1 A0片内寻址) |
| CS_8253 | X...X | X 0 1 1 | X...X | 300H-303H (A1 A0片内寻址) |
| CS_IC4 | X...X | X 1 0 0 | X...X | 400H |
| CS_IC5 | X...X | X 1 0 1 | X...X | 500H |
| CS_IC6 | X...X | X 1 1 0 | X...X | 600H |
| CS_IC7 | X...X | X 1 1 1 | X...X | 700H |
说明：
- X = 任意值（0或1）
- 端口地址由74LS138译码器生成（基于A8-A10）
- CS信号直接连接至对应芯片的片选引脚