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