# NDIS Implementation Information
for IBM LAN Systems
NDIS Extensions

## Table of Contents

- About This Document

- 1.0 New General Request to Modify OPEN Parms
- 1.1 Syntax of ModifyOpenParms NDIS Primitive
- 1.2 Change to Service Flags to Support ModifyOpenParms

- 2.0 Proposed Changes to the MAC SSC

- 3.0 Proposed Changes to the MAC 802.5 Media Specific Statistics

- 4.0 Proposed Changes to the Status Indication General Request

- Notices
  - Copyrights
  - Disclaimers
  - Trademarks

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## About This Document

This document proposes extensions to the current Network Driver Interface Specification (NDIS) 2.0.1 dated October 5, 1990. These extensions are required in order for IBM* to properly implement the IEEE 802.2 CCB interface as an NDIS protocol driver. These extensions would not necessarily require a change to existing media access control (MAC) device drivers. In fact, these extensions are intended only for 802.5 type MAC device drivers. A MAC device driver can indicate that the extensions in this document are supported by setting the minor NDIS version to 02 in the common characteristics table.

The proposal would add a new primitive to the NDIS interface and also extend the MAC service specific characteristics table (SSC) and the MAC media specific statistics (MSS) for 802.5 Details of these extensions are given in the following sections.

Note: NDIS 2.0.1 is jointly authored by 3Com** and Microsoft.** The SSC and MSS are tables defined in the NDIS. The extensions to NDIS 2.0.1, as described in this document, are derived by IBM.

This document refers to the following publications for additional information:

- Microsoft/3Com LAN Manager** Network Driver Interface Specification (NDIS), Version 2.0.1, October 8, 1990.
- Microsoft LAN Manager Programmer's Guide for NDIS, Version 2.0.1, June 1990
- IBM LAN Technical Reference

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## 1.0 New General Request to Modify OPEN Parms

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### 1.0 New General Request to Modify OPEN Parms

    Purpose: Modify Open Parameters

    PUSH WORD	ProtID  	;Module ID of Protocol
    PUSH WORD	ReqHandle	;Unique handle for this request or 0
    PUSH WORD	OpenOptions	;New Open Options for adapter
    PUSH WORD	0	        ;Pad parameter - must be 0
    PUSH WORD	16	        ;Opcodes for this request
    PUSH WORD	MACDS   	;DS of called MAC module
    Call Request

    Returns:

               0x0000	SUCCESS
               0x0002	REQUEST_QUEUED
               0x0003	OUT_OF_RESOURCE
               0x0007	INVALID_PARAMETER
               0x0008	INVALID_FUNCTION
               0x0009	NOT_SUPPORTED
               0x00FF	GENERAL_FAILURE

Description:

This command directs a MAC device driver to change the adapter specific OpenOptions on the adapter. For IBM Token-Ring compatible adapters, OpenOptions are defined in the IBM LAN Technical Reference Manual.

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### 1.2 Change to Service Flags to Support ModifyOpenParms

Bit 17 of the Service flags in the MAC device driver SCC indicates if the MAC device driver supports the modification of the Open parameters with the new ModifyOpenParms NDIS primitive.

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## 2.0 Proposed Changes to the MAC SSC

The MAC SSC will be extended to include a pointer to a new table.

Note: The pointer to this new table is included immediately following the Max number of data blocks in the current definition of the MAC SSC.

This new table has the following structure:

    	BYTE    	AdapterConfig (DIR. STATUS)
    	BYTE    	Reserved
    	BYTE(10)	MicroCodeLevel (DIR.STATUS)
    	DWORD   	AdapterParmsAddr (DIR.STATUS)
    	DWORD   	AdapterMACAddr (DIR. STATUS)
    	WORD    	SRAMAddress (DIR. INITIALIZE)
    	WORD    	BringUps (DIR. INITIALIZE and DIR.OPEN.ADAPTER)
    	WORD    	AdapterType (DIR. STATUS)

The previous values are needed to support the IBM IEEE 802.2 CCB interface DIR.STATUS and DIR.INITIALIZE commands. These commands are defined in the IBM LAN Technical Reference as follows:

Previous Value | New Value and Location
AdapterConfig | adapter_config in DIR.STATUS
MicroCodeLevel | microcode_level in DIR.STATUS
AdapterParmAddr | adapter_parms_addr in DIR.STATUS
AdapterMACAddr | adapter_mac_addr in DIR.STATUS
SRAMAddress | SRAM_address in DIR.INITIALIZE
BringUps | bring_ups in DIR.INTIALIZE and DIR.OPEN.ADAPTER
AdapterType | adapter_type in DIR.STATUS

Note that a protocol can determine if the MAC device driver supports this extended table format by looking at the minor NDIS version byte of the common characteristics table. This byte is set to 02 for this version. A MAC device driver may not need to support the extended SSC format but needs to support version 2.02 for some other reason (for example ModifyOpenParms). This can be done by setting the minor NDIS version byte of the CCT to 02 and setting the pointer to the previously defined structure to NULL.

Also note that even though link speed is already returned in the common characteristics table, it should also be returned in the AdapterConfig byte.

Certain adapter cards may not be able to support all of the fields in this structure. For these MAC device drivers, binary 0's can be inserted in those fields that are not supported.

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## 3.0 Proposed Changes to the MAC 802.5 Media Specific Statistics

The MAC media specific statistics (MSS) are extended to include the following information:

        WORD	RingUtilizationMeasurement (DIR.STATUS)

Note: The fields defined here are included immediately following the number of underruns in the current definition of the MAC MSS.

The previous value is needed in order to support the IBM IEEE 802.2 CCB interface DIR.STATUS. It is defined in the IBM LAN Technical Reference as follows:

    RingUtilizationMeasurement is ring utilization measurement in (DIR.STATUS)

Note that a protocol can determine if the MAC device driver supports this extended table format by looking at the minor NDIS version byte of the common characteristics table. This byte is set to 02 for this version. 'The 802.5 statistics structure version level is also 02 in the 802.5 MSS.

Note that if this counter is not supported, it must be set to FFFF.

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## 4.0 Proposed Changes to the Status Indication General Request

An additional Status Indication is being proposed to inform the upper layers of status changes concerning the presence of the PCMCIA LAN adapters. Existing protocol stacks that do not support this new NDIS primitive will have to rely on existing NDIS support for error indications. For situations where the new Status Indication is not supported the existing Ring Status Status Indication of Lobe Wire Fault would be appropriate. The Status Indication is called AdapterPresence.

    Purpose: Return a change in the Presence of a LAN Adapter.

    PUSH WORD   	MACID   	;Module ID of MAC
    PUSH WORD   	Status  	;New Adapter Status
    PUSH LPBYTE  	Indicate	;Virtual address if indicate flag
    PUSH WORD   	6       	;Adapter Presences Indication
    PUSH WORD   	ProtDS   	;DS of called protocol module
    Call Status

    Returns:
                     0x0000  SUCCESS

Called by LAN MAC drivers to indicate a change in the presence of a LAN Adapter. The status codes for the MAC drivers are encoded in a 16 bit mask, where the bits for the mask are defined as:

Bit | Meaning
15 | Ejection Request
14 | Ejection Complete
13 | Insertion Request
12 | Insertion Complete
11 | Card Insertion
10 | Card Removal
9 | PM Resume(Reserved)
8 | PM Suspend (Reserved)
7-0 | Reserved

For further details refer to the PCMCIA Card Services Interface Specification, Release 2.00 and Network Driver Interface Specification, Version 2.01.

Note: Currently, only the NetBEUI device driver supports these proposed extensions. This implementation in NetBEUI only supports the Card Insertion and Card Removal status codes. The Card Removal status code is reported as a Lobe Wire Fault to the application.

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## Notices

May, 1995

Issued by:

IBM Corporation
Personal Software Products
11400 Burnet Road
Austin, Texas 78758

First Edition (May 1992)

Second Edition (May 1993)

Third Edition (May 1995)

The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties in certain transactions, therefore, this statement may not apply to you.

This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. IBM may make improvements and/or changes in the product(s) and/or program(s) described in this publication at any time.

It is possible that this publication may contain reference to, or information about, IBM products (machines and programs), programming, or services that are not announced in your country. Such references or information must not be construed to mean that IBM intends to announce such IBM products, programming, or services in your country.

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### Copyright Notices

© Copyright International Business Machines Corporation 1992, 1995. All rights reserved.

Note to U.S. Government Users - Documentation related to restricted rights - Use, duplication or disclosure is subject to restrictions set forth in GSA ADP Schedule Contract with IBM Corp.

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### Disclaimers

References in this publication to IBM products, programs, or services do not imply that IBM intends to make these available in all countries in which IBM operates. Any reference to an IBM product, program, or service is not intended to state or imply that only IBM's product, program, or service may be used. Any functionally equivalent product, program, or service that does not infringe any of IBM's intellectual property rights or other legally protectible rights may be used instead of the IBM product, program, or service. Evaluation and verification of operation in conjunction with other products, programs, or services, except those expressly designated by IBM, are the user's responsibility.

IBM may have patents or pending patent applications covering subject matter in this document. The furnishing of this document does not give you any license to these patents. You can send license inquiries, in writing, to the IBM Director of Commercial Relations, IBM Corporation, Purchase, NY 10577.

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### Trademarks

The following terms, denoted by an asterisk (*) in this publication, are trademarks of the IBM Corporation in the United States and/or other countries:

IBM | OS/2

The following terms, denoted by a double asterisk (**) in this publication, are trademarks of other companies as follows:

Microsoft | Microsoft Corporation
Microsoft LAN Manager | Microsoft Corporation
3Com | 3Com Corporation