File: IBM PC/AT

About: I/O Address Map

> +---------------+-------------------------+
> | 0x000 - 0x01F | DMA controller 1        |
> +---------------+-------------------------+
> | 0x020 - 0x03F | 8259A, Primary          |
> +---------------+-------------------------+
> | 0x040 - 0x05F | Timer                   |
> +---------------+-------------------------+
> | 0x060 - 0x06F | Keyboard                |
> +---------------+-------------------------+
> | 0x070 - 0x07F | CMOS                    |
> +---------------+-------------------------+
> | 0x080 - 0x09F | DMA page register       |
> +---------------+-------------------------+
> | 0x0A0 - 0x0BF | 8259A, Secondary        |
> +---------------+-------------------------+
> | 0x0C0 - 0x0DF | DMA controller 2        |
> +---------------+-------------------------+
> | 0x0F0         | Clear Math Coprocessor  |
> +---------------+-------------------------+
> | 0x0F1         | Reset Math Coprocessor  |
> +---------------+-------------------------+
> | 0x0F8 - 0x0FF | Math Coprocessor        |
> +---------------+-------------------------+
> | 0x1F0 - 0x1F8 | Fixed Disk              |
> +---------------+-------------------------+
> | 0x200 - 0x207 | Game I/O                |
> +---------------+-------------------------+
> | 0x278 - 0x27F | Parallel printer port 2 |
> +---------------+-------------------------+
> | 0x2F8 - 0x2FF | Serial port 2           |
> +---------------+-------------------------+
> | 0x300 - 0x31F | Prototype card          |
> +---------------+-------------------------+
> | 0x360 - 0x363 | PC Network (low)        |
> +---------------+-------------------------+
> | 0x368 - 0x36B | PC Network (high)       |
> +---------------+-------------------------+
> | 0x378 - 0x37F | Parallel printer port 1 |
> +---------------+-------------------------+
> | 0x380 - 0x38F | SDLC, bisynchronous  2  |
> +---------------+-------------------------+
> | 0x3B0 - 0x3BF | Monochrome Display      |
> +---------------+-------------------------+
> | 0x3D0 - 0x3DF | Color Monitor Adapter   |
> +---------------+-------------------------+
> | 0x3F0 - 0x3F7 | Diskette controller     |
> +---------------+-------------------------+
> | 0x3F8 - 0x3FF | Serial port 1           |
> +---------------+-------------------------+