I/O Map - Xycom XVME-655 Manual

I/O Map

Table Chapter 4 -2 illustrates the XVME-655's I/O map.
Serial and parallel port addresses are controlled in the BIOS setup
menus. Changing the setting will change the I/O location.
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Table Chapter 4 -2. I/O Map
Address Range Device
000-01F DMA controller 1, 8237A-5 equivalent
020-021 Interrupt controller, 8259 equivalent
022-023 Available
025-02F Interrupt controller 1, 8259 equivalent
040-05F Timer, 8254-2 equivalent
060-06F Keyboard, 8742 equivalent
070-07F Real-time clock, bit 7 NMI mask
080-091 DMA page register
93-9F DMA page register
0A0-0BF Interrupt controller 2, 8259 equivalent
0C0-0DF DMA controller 2, 8237A-5 equivalent
0F0 N/A
0F1 N/A
0F2-0FF N/A
100 Available
102 Available
103-1EF Available
1F0-1F7 IDE controller (AT drive)
218 Xycom Temp/Abort port
219 Xycom LED/BIOS port
278-27F Alternate parallel port
280-2F7 Available
2F8-2FF Serial port 2
300-36F Available
370-377 Alternate floppy disk controller
378-37F Parallel port 1
380-3BF Available
3C0-3DF VGA/EGA
3E0-3EF Available
3F0-3F7 Primary floppy disk controller
3F8-3FF Serial port 1
4D0 ELCR1 edge- or level-triggered interrupt
4D1 ELCR2 edge- or level-triggered interrupt
CF8 PCI configuration address register
CF9 Reset control register
CFC PCI configuration data register
Note
Chapter 4 – Programming
4-2