Chapter 3 |
| Hardware | |
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| Address (hex) | Subsystem |
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| Programmable Interrupt Timer (Clock/Timer) |
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| Keyboard Controller |
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| RTC/ NMI enable |
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| DMA Page |
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| 0094 | Motherboard VGA enable |
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| Slave Interrupt Controller (#2) |
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| Secondary DMA Controller (#2) |
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| 0102 | VGA setup register |
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| Primary IDE (configurable) |
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| Secondary IDE (configurable) |
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| 0201 | Watchdog trigger (configurable, disabled by default) |
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| COM4 (configurable) |
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| COM2 (configurable) |
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| 0376 | Secondary IDE (see 170) |
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| LPT 1 (configurable, disabled by default) |
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| LPT 1 (only in EPP modes) |
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| VGA registers (monochrome mode only) |
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| 03BA | VGA registers (monochrome mode only) |
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| VGA registers |
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| VGA registers (color mode only) |
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| 03DA | VGA registers (color mode only) |
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| COM3 (configurable) |
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| Super I/O Configuration |
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| Floppy Disk Controller (configurable) |
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| 03F6 | Primary IDE (see 1F0) |
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| 03F7 | Floppy Disk Controller (see 3F0) |
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| COM1 (configurable) |
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| LPT 1 (only in ECP modes) |
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| 0CF8 | PCI Configuration Address |
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| PCI Configuration Data |
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| 46E8 | VGA |
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| General Purpose I/O for customer use |
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| Board control |
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| IDE Bus Master registers (PCI mode) |
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| Secondary IDE Control (PCI mode) |
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| Secondary IDE Command (PCI mode) |
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| Primary IDE Control (PCI mode) |
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| Primary IDE Command (PCI mode) |
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Note: Configurable indicates the device’s base address can be configured and/or the device can be disabled, either through BIOS Setup or hardware jumpers.
CoreModule 420 | Reference Manual | 21 |