![](/images/new-backgrounds/1165695/16569591x1.webp)
DMAs
PCS |
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DMA0 | IEEE1284 ECP port or Sound Blaster | |
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DMA1 | IEEE1284 ECP port (BIOS Setup) or Sound Blaster | |
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DMA2 | Floppy Disk Controller | |
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DMA3 | Sound Blaster | |
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DMA4 |
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DMA5 | unassigned | |
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DMA6 | unassigned | |
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DMA7 | unassigned | |
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I/O Address List
Never attempt to access an I/O address for which no device exists.
I/O Address | Device |
0000 to 000F | DMA controller |
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0020 to 0021 | Interrupt controller |
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0040 to 0043 | System timer |
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0060 to 0064 | Keyboard controller, NMI status and control is at 0061 |
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0070 to 0071 | |
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0080 to 008F | DMA bank register |
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0094 to 009F | VGA controller |
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00A0 to 00A1 | Interrupt controller |
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00B2 to 00B3 | Power Management |
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00C0 to 00DE | DMA controller 2 |
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00F0 to 00FF | Coprocessor |
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0102 to 010F | VGA controller |
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0220 to 022F | Sound generator |
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02E8 to 02EE | Serial port COM4 |
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02F8 to 02FE | Serial port COM2 |
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0378 to 037F | Parallel port |
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0388 to 038B | Sound generator |
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0398 to 0399 | Super I/O #1 |
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03B4 to 03DA | VGA controller |
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03E8 to 03EE | Serial port COM3 |
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03F0 to 03F7 | Floppy disk controller |
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03F8 to 03FE | Serial port COM1 |
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0CF8 to 0CFF | PCI bus controller |
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46E8 to 46E9 | VGA controller |
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Appendix B: Programming Interface 35