Chapter 3 Hardware
CoreModule 420 Reference Manual 21
Address (hex) Subsystem
0040-0043 Programmable Interrupt Timer (Clock/Timer)
0060-0064
Keyboard Controller
0070-0071 RTC/ NMI enable
0080-008F DMA Page
0094 Motherboard VGA enable
00A0-00A1 Slave Interrupt Controller (#2)
00C0-00DF Secondary DMA Controller (#2)
0102 VGA setup register
01F0-01F7 Primary IDE (configurable)
0170-0177 Secondary IDE (configurable)
0201
Watchdog trigger (configurable, disabled by default)
02E8-02EF COM4 (configurable)
02F8-02FF COM2 (configurable)
0376
Secondary IDE (see 170)
0378-037B LPT 1 (configurable, disabled by default)
0378-037F LPT 1 (only in EPP modes)
03B4-03B5 VGA registers (monochrome mode only)
03BA VGA registers (monochrome mode only)
03C0-03CF VGA registers
03D4-03D5 VGA registers (color mode only)
03DA VGA registers (color mode only)
03E8-03EF COM3 (configurable)
03F0-03F1 Super I/O Configuration
03F0-03F5 Floppy Disk Controller (configurable)
03F6 Primary IDE (see 1F0)
03F7 Floppy Disk Controller (see 3F0)
03F8-03FF COM1 (configurable)
0778-077A LPT 1 (only in ECP modes)
0CF8 PCI Configuration Address
0CFC-0CFF PCI Configuration Data
46E8 VGA add-in mode enable register
D000-D007 General Purpose I/O for customer use
D400-D407 Board control
E400-E43F On-Board Ethernet
E800-E80F IDE Bus Master registers (PCI mode)
EC00-EC0F Secondary IDE Control (PCI mode)
F000-F00F Secondary IDE Command (PCI mode)
F400-F40F Primary IDE Control (PCI mode)
F800-F80F Primary IDE Command (PCI mode)
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.
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