Mercury Green 320, Service Manual

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Hexadecimal Range Devices Usage
00-01F Master DMA Controller System
20-03F Master interrupt controller System
40-05F Timer/Counter System
60,064 Keyboard controller System
(60h) KBC data System
(61h) System speaker System
(64h) KBC command/status System
70-77 RTC/CMOS/NMI-disable System
78-7F -available for system use- System
80 -reserved- (debug port) System
81-8F DMA page registers System
90-91 -available for system use- System
92 System control System
93-9F -available for system use- System
A0-BF Slave interrupt controller System
C0-DF Slave DMA controller System
E0-FF -available for system use- System
100-CF7 -available for system use* System
CF8-CFB PCI configuration address System
CFC-CFF PCI configuration data System
D00-FFFF -available for system use- System
378-37F Parallel port (standard & EPP) I/O
3F0-3F1 Configuration index/data I/O
3F0-3F7 Floppy controller I/O
778-77A Parallel port (ECP extensions) (port 378+400) I/O