Arkon AIMB-258 user manual DMA Channel Assignments, Table B.16 System I/O Ports

B.16 System I/O Ports

Table B.16: System I/O Ports

Addr. range (Hex)	Device
000-01F	DMA controller
020-021	Interrupt controller 1, master
022-023	Chipset address
040-05F	8254 timer
060-06F	8042 (keyboard controller)
070-07F	Real-time clock, non-maskable interrupt (NMI)
	mask
080-09F	DMA page register
0A0-0BF	Interrupt controller 2
0C0-0DF	DMA controller
0F0	Clear math co-processor
0F1	Reset math co-processor
0F8-0FF	Math co-processor
1F0-1F8	Fixed disk
200-207	Game I/O
290-29F	On-board hardware monitor
2F8-2FF	Serial port 2
300-31F	Prototype card
360-36F	Reserved
380-38F	SDLCm bisynchronous 2
3A0-3AF	Bisynchronous 1
3C0-3CF	Reserved
3D0-3DF	Color/graphics monitor adapter
3F0-3F7	Diskette controller
3F8-3FF	Serial port 1
3E8-3EF	Serial port3
2E8-2EF	Serial port4
4F8-4FF	Serial port5
4E8-4EF	Serial port6

B.17 DMA Channel Assignments

Table B.17: DMA Channel Assignments

Channel	Function
0	Available
1	Available
2	Floppy disk (8-bit transfer)
3	Available
4	Cascade for DMA controller 1
5	Available
6	Available
7	Available

Appendix B Pin Assignments

73 AIMB-258 User Manual