CP/486DX2 I/O MAP
| CP/486DX2 I/O ADDR. MAPPING | ||
|---|---|---|
| I/O Addr. Range | CP/486DX2 Usage | PC/AT Standard |
| 000h - 00Fh | 8237 DMA Controller #1 | 8237 DMA Controller #1 |
| 020h - 021h | 8259 Master Interrupt Controller | 8259 Master Interrupt Controller |
| 022h - 024h | System Controller | --- |
| 040h - 043h | 8253 Programmable Timer | 8253 Programmable Timer |
| 060h - 06Fh | 8042 Keyboard Controller | 8042 Keyboard Controller |
| 070h - 07Fh | RTC, NMI Mask Register | RTC, NMI Mask Register |
| 080h - 09Fh | Diagnostic Port, DMA Page Registers | DMA Page Registers |
| 0A0h - 0B1h | 8259 Slave Interrupt Controller | 8259 Slave Interrupt Controller |
| 0C0h - 0DFh | 8237 DMA Controller #2 | 8237 DMA Controller #2 |
| 0F0h - 0F1h | Math Coprocessor | Math Coprocessor |
| 0F8h - 0FFh | Math Coprocessor | Math Coprocessor |
| 170h - 177h | Unused | Hard Disk Controller #2 |
| 1F0h - 1F8h | Hard Disk Controller #1 | Hard Disk Controller #1 |
| 200h - 207h | Unused | Game Port |
| 238h - 23Bh | Unused | Bus Mouse |
| 23Ch - 23Fh | Unused | Alt. Bus Mouse |
| 240h - 277h | Unused | Unused |
| 278h - 27Fh | Parallel Printer | Parallel Printer |
| 280h - 2AFh | Unused | Unused |
| 2B0h - 2BFh | Unused | EGA |
| 2C0h - 2CFh | Unused | EGA |
| 2D0h - 2DFh | Unused | EGA |
| 2E0h - 2E7h | Unused | GPIB |
| 2E8h - 2EFh | Serial Port | Serial Port |
| 2F8h - 2FFh | Serial Port | Serial Port |
| 300h - 30Fh | On-board LAN and System Port | Prototype Card |
| 310h - 31Fh | On-board LAN and System Port | Prototype Card |
| 320h - 32Fh | On-board LAN | Hard Disk Controller XT |
| 330h - 33Fh | On-board LAN | Unused |
| 340h - 36Fh | Unused | Unused |
| 370h - 377h | Unused | Floppy Disk Controller #2 |
| 378h - 37Fh | Parallel Printer | Parallel Printer |
| 380h - 38Fh | Unused | SDLC Adapter |
| 390h - 39Fh | Unused | Unused |
| 3A0h - 3AFh | Unused | SDLC Adapter |
| 3B0h - 3BBh | Unused | MDA Adapter |
| 3BCh - 3BFh | Parallel Printer | Parallel Printer |
| 3C0h - 3CFh | Unused | VGA/EGA Adapter |
| 3D0h - 3DFh | Unused | CGA Adapter |
| 3E8h - 3EFh | Serial Port | Serial Port |
| 3F0h - 3F7h | Floppy Controller #1 | Floppy Controller #1 |
| 3F8h - 3FFh | Serial Port | Serial Port |
Please note: Donīt use the address range 0x300 - 0x31F for other I/O boards. If there any other I/O board in this address space, the CP/486DX2 canīt access all parts of the FLASH BIOS and the on-board FLASH SSD.