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PCA-6780 User Manual 72
Appendix C System Assignments
C.1 System I/O Ports
Table C.1: System I/O ports
Addr. range (Hex) Device
00-0F Master DMA controller
20-21F Master Interrupt controller
40-5F Timer/Counter
60-6F Keyboard controller
(60h) KBC Data
(61h) Misc Functions & Spkr Ctrl
(64h) KBC Command/Status
70-77 RTC/COMS/NMI-Disable
78-7F -available for system use-
80 -reserved-(debug port)
81-8F DMA Page Registers
90-91 -available for system use-
92 System Control
93-9F -available for system use-
A0-A1H Slave Interrupt Controller
C0-DF Slave DMA Controller
E0-FF -available for system use-
100-CF7 -available for system use-
CF8-CFB PCI Configuration Address
CFC-CFF PCI Configuration Data
D00-FFFF -available for system use-
200-20F Game Port
2F8-2FF COM2
378-37F Printer Port (Standard & AFF)
3F0-3F1 Configuration Index/Data
3F0-3F7 Floppy Controller
3F8-3FF COM1