
I/O Address Map
Hex range
Device
000-01 F
8237A-5 DMA Controller #1
020-03F
8259A Interrupt Controller #1
040-05F
8254-2 Timer
060-06F
8042 Keyboard Controller
070-07F
Real Time Clock NMI (Non-Maskable Interrupt) Mask
080-09F
74LS612 DMA Page Register
0A0-0BF
8259A Interrupt Controller #2
0C0-0DF
8237A-5 DMA Controller #2
0F0
Clear Math Coprocessor Busy
0F1
Reset Math Coprocessor
OF&OFF
Math Coprocessor
378-37F
Parallel Printer Port on Board
3F0-3F7
Floppy Disk Drive Control on Board
3F8-3FF
Serial Port on Board
Note: l/O address, hex 000 to FFF are reserved for the system board
110.
Hex 100 to 3FF are available on the l/O channel.
Specifications A-5
Содержание CW3S20A Canadian Product
Страница 1: ...SX386E OPERATIONS GUIDE...
Страница 17: ...Appendix C Connector Pinouts I OPorts C l Expansion Slot Connectors C 5 Contents xvii...
Страница 145: ...Figure 7 6 Mounting the Internal Hard Disk Drive 7 16 Expanding Your System...
Страница 148: ...l Memory Bank Configurations l BIOS ROM 64K byte 150ns 2ea Specifications A 3...