PORTIBM PC Portable (uses same BIOS as XT) 0481-048B - EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus). DMAsee Direct Memory Access page registers
Note:	these registers are also supported on many non-EISA machines, e.g. by
	  most machines using Intel PCI chipsets
SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 0401h-040Bh"EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus).",PORTIBM PC Portable (uses same BIOS as XT) 04C6h-04CFh"EISA(Enhanced Industry-Standard Architecture) A 32-bit superset of the IBMInternational Busiuness Machines ATIBM PC AT's expansion bus (which is now known as the ISA or Industry-Standard Architecture bus)."

0481  RW  DMAsee Direct Memory Access channel 2 address byte 3 (high)
0482  RW  DMAsee Direct Memory Access channel 3 address byte 3 (high)
0483  RW  DMAsee Direct Memory Access channel 1 address byte 3 (high)
0487  RW  DMAsee Direct Memory Access channel 0 address byte 3 (high)
0489  RW  DMAsee Direct Memory Access channel 6 address byte 3 (high)
048A  RW  DMAsee Direct Memory Access channel 7 address byte 3 (high)
048B  RW  DMAsee Direct Memory Access channel 5 address byte 3 (high)