PORTIBM PC Portable (uses same BIOS as XT) 0279 - Plug-and-Play - CONFIGURATION REGISTER SeeAlso: PORTIBM PC Portable (uses same BIOS as XT) 0A79h 0279 -W index into Plug-and-Play register set for Read Data Port and Write Data Port I/O (see #P0550,#P0551) (Table P0550) Values for Plug-and-Play Card-Level Registers: 00h set Read Port address bits 9-2 of Read Data port address (bits 15-10 are always 0, bits 1-0 are always 11); valid Read Port addresses are 0203h-03FFh 01h serial isolation 02h configuration control 03h Wake command (specifies which card is accessed through configuration registers) 04h resource data 05h status 06h Card Select Number (CSN) 07h logical device number (selects which logical device on card is accessed at locations 30h-FFh) (see #P0551) 08h-1Fh reserved 20h-2Fh vendor-specific Note: there is one set of these registers per installed card SeeAlso: #P0551 (Table P0551) Values for Plug-and-Play Logical Device Registers: 30h activate bit 0: device is active on ISA(Industry-Standard Architecture) The expansion bus used by the IBMInternational Busiuness Machines PCIBM PC/ATIBM PC AT. See also EISA. bus bits 7-1: reserved (0) 31h I/O range check bit 0: I/O Read Pattern select (if bit 1 set, then I/O reads return 55h if this bit is set, AAh if this bit is clear) bit 1: I/O Range Check Enable: if set, all reads from device I/O registers return 55h or AAh, depending on bit 0 bits 7-2: reserved (0) 32h-37h reserved 38h-3Fh vendor-specific 40h-44h 24-bit ISA(Industry-Standard Architecture) The expansion bus used by the IBMInternational Busiuness Machines PCIBM PC/ATIBM PC AT. See also EISA. memory descriptor 0 45h-47h reserved 48h-4Ch 24-bit ISA(Industry-Standard Architecture) The expansion bus used by the IBMInternational Busiuness Machines PCIBM PC/ATIBM PC AT. See also EISA. memory descriptor 1 4Dh-4Fh reserved 50h-54h 24-bit ISA(Industry-Standard Architecture) The expansion bus used by the IBMInternational Busiuness Machines PCIBM PC/ATIBM PC AT. See also EISA. memory descriptor 2 55h-57h reserved 58h-5Ch 24-bit ISA(Industry-Standard Architecture) The expansion bus used by the IBMInternational Busiuness Machines PCIBM PC/ATIBM PC AT. See also EISA. memory descriptor 3 5Dh-5Fh reserved 60h-6Fh I/O configuration registers 0-7 70h-71h IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. channel select 0 72h-73h IRQ(Interrupt ReQuest) A hardware line connected to the interrupt controller chip which signals that a CPU interrupt should be generated. channel select 1 74h-75h DMAsee Direct Memory Access configuration registers 0-1 76h-7Eh 32-bit memory range configuration register 0 7Fh reserved 80h-88h 32-bit memory range configuration register 1 89h-8Fh reserved 90h-98h 32-bit memory range configuration register 2 99h-9Fh reserved A0h-A8h 32-bit memory range configuration register 3 A9h-EFh reserved for logical device configuration F0h-FEh vendor-specific FFh reserved Note: there is one set of these registers per logical device SeeAlso: #P0550