PORTIBM PC Portable (uses same BIOS as XT) 0401-040B - 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 Controller
SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 0481h-048Bh"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) 04D4h-04D6h"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)."

0401  RW  DMAsee Direct Memory Access channel 0 word count byte 2 (high)
0403  RW  DMAsee Direct Memory Access channel 1 word count byte 2 (high)
0405  RW  DMAsee Direct Memory Access channel 2 word count byte 2 (high)
0407  RW  DMAsee Direct Memory Access channel 3 word count byte 2 (high)
040A  -W  extended DMAsee Direct Memory Access chaining mode register, channels 0-3 (see #P0884)
040A  R-  channel interrupt (IRQ13) status register (see #P0885)
040B  -W  DMAsee Direct Memory Access extended mode register for channels 0-3 (see #P0886)
	(bit settings same as PORTIBM PC Portable (uses same BIOS as XT) 04D6h)


Bitfields for 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). extended DMAsee Direct Memory Access chaining mode register (channels 0-3):
Bit(s)	Description	(Table P0884)
 7-5	reserved
 4	=0  generate IRQ13
	=1  generate terminal count
 3	=0  do not start chaining
	=1  programming complete
 2	=0  disable buffer chaining mode (default)
	=1  enable buffer chaining mode
 1-0	DMAsee Direct Memory Access channel select
SeeAlso: #P0885,#P0886,#P0893


Bitfields for 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). channel interrupt (IRQ13) status register:
Bit(s)	Description	(Table P0885)
 7-5  interrupt on channels 7-5
 4	  reserved
 3-0  interrupt on channels 3-0
SeeAlso: #P0884


Bitfields for 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 extended mode register (channels 0-3):
Bit(s)	Description	(Table P0886)
 7	=0 enable stop register
 6	=0 terminal count is an output for this channel	(default)
 5-4	DMAsee Direct Memory Access cycle timing
	00 ISA-compatible (default)
	01 type A timing mode
	10 type B timing mode
	11 burst DMAsee Direct Memory Access mode
 3-2	Address mode
	00 8-bit I/O, count by bytes (default)
	01 16-bit I/O, count by words, address shifted
	10 32-bit I/O, count by bytes
	11 16-bit I/O, count by bytes
 1-0	DMAsee Direct Memory Access channel select
SeeAlso: #P0884,#P0894