MEMMAP.TXT Driver File Contents (HP-J2970A.zip)

                       MEMORY MAP INFORMATION FOR
                   HP DESKDIRECT 10/100  PCI LAN ADAPTER
 
 This file describes drivers' memory-mapped mode support and which portions
 of the computer's memory address space each driver can use.
 
 The PCI Plug-and Play BIOS adapter will automatically assign an 8 Kbyte
 region of memory address space in case memory-mapped data transfer mode
 is chosen.  Note the default for the HP DeskDirect adapter is to use 
 busmaster data transfer mode.
 
 In the memory-mapped data transfer mode the card uses the 8 Kbyte region
 of memory address space to transfer data between the computer and adapter
 memory.
 
 Normally, there is no need to configure the HP DeskDirect adapter's
 Memory-Map Address Range because the Plug-and-Play PCI BIOS will make
 sure that the 8 Kbyte block of addresses is configured in an area not
 used by any other device in the computer.  This is good and bad.  It
 is good because no conflicts will occur.  It is bad because the address
 range typically assigned is above extended memory (eg. beyond the last byte
 of RAM installed on the computer) and DOS drivers, which cannot access
 addresses above 1 Mbyte, cannot reach it.
 
 NOTE: See the note labeled "Memory-Map in Upper Memory Area for DOS ODI
       and NDIS2 Drivers" below.
  
 The two regions of memory where the PCI BIOS can assign the 8 Kbytes of
 memory address space the HP DeskDirect adapters use for memory-mapped mode:
 
    Upper Memory Area     - the 384 Kbyte of addresses above 640K and
                            below 1024K (1 Mbyte)
    Above Extended Memory - any unused addresses above the last byte of
                            extended memory
 
                                         Upper Memory    Above Extended
      Driver                                Area             Memory
 -------------------------------------  --------------  ----------------
 16-bit ODI for DOS or Windows           Supported[1]    NOT SUPPORTED
 16-bit NDIS 2.01 for DOS or Windows     Supported[1]    NOT SUPPORTED
 16-bit ODI for OS/2                     Supported       Supported
 16-bit NDIS 2.01 for OS/2               Supported       Supported
 32-bit ODI for NetWare, NT              Supported       Supported
 32-bit NDIS 3.0 for NT, WFWG, WIN95     Supported       Supported
 32-bit LLI and MDI for SCO              Supported       Supported
 ----------------------------------------------------------------------
 [1] By use of the MEM or MEMORYMAPBASE keyword.  See the note below.
 
 
 Memory-Map in Upper Memory Area for DOS ODI and NDIS2 Drivers
 =============================================================
 The PCI Plug-and-Play BIOS will assign HP DeskDirect a Memory-Map Address 
 Range above extended memory.  DOS drivers (ODI and NDIS2) cannot access these
 addresses due to the one megabyte address limit of the CPU in real-mode.
 
 To force the HP DeskDirect adapter memory-map range into the upper memory area
 between 640K and 1024K (1 Mbyte), use the MEM keyword in the NET.CFG or
 MEMORYMAPBASE keyword PROTOCOL.INI.
 
 For the DOS ODI driver, see the file \DOS\README.DOS for syntax of the MEM
 keyword.
 
 For the NDIS2 driver, see the \NDIS2\PROTOCOL.TXT file for syntax of the 
 MEMORYMAPBASE keyword.
 
 NOTE: If you are running a DOS expanded memory manager on your computer
       (EMM386, QEMM, 386MAX, etc), make sure to use an EXCLUDE statement
       on its command line in the CONFIG.SYS file to prevent usage of the
       8 Kbyte area allocated for the adapter by the expanded memory manager.
       For example, to exclude an adapter's memory-mapped region of 8 Kbyte
       at D0000h using Microsoft's EMM386:
 
          DEVICE=EMM386.SYS X=D000-D1FF
 
 NOTE: The MEM/MEMORYMAPBASE keywords might not work on computers with
       multiple PCI busses.  See the section labeled "Multiple PCI Bus
       Computers" in the file \TECHNOTE\PCI_INFO.TXT.
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