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98 lines
2.9 KiB
Plaintext
98 lines
2.9 KiB
Plaintext
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; File: 802Equ.a
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;
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; Contains: Equates for IEEE network standards
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;
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; Written by: Kerry E. Lynn, Sean Findley
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;
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; Copyright: © 1990, 1992 by Apple Computer, Inc., all rights reserved.
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;
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; Change History (most recent first):
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;
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; <1> 10/6/92 GDW New location for ROMLink tool.
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; <1> 3/26/92 FM first checked in
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; <1> 12/14/90 JK Added to build
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;
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; To Do:
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;
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;-----------=-----------=-------------------------------=---------------------------------------
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; 802Equ.a - Equates for IEEE network standards
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;
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; Kerry E. Lynn
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; Feb 1989
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;
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; Copyright (C) 1989 by:
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;
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; Apple Computer, Inc.
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; 20525 Mariani Ave.
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; Cupertino, CA 95014
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;
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; All Rights Reserved.
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;-----------=-----------=-------------------------------=---------------------------------------
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; 24-bit quantities, left justified
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AppleCode EQU $08000700 ; Apple's vendor code for 802.2 Individual addr
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MultiCode EQU $09000700 ; Apple's vendor code for 802.2 Group addr
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; Size of a MAC addr
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MACAddrSz EQU 6 ; max size (in bytes) for data link addr
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MaxMCastSz EQU MACAddrSz ; max size (in bytes) for multicast addr
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;---------------------------------------
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; 802.3 MAC packet header
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;---------------------------------------
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MDstAddr EQU 0 ; Offset to destination address
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MSrcAddr EQU MDstAddr+MACAddrSz ; Offset to source address
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MLength EQU MSrcAddr+MACAddrSz ; Offset to LLC length
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MHdrSize EQU MLength+2 ; 802.3 MAC header size
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;---------------------------------------
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; 802.2 LLC (Type 1) packet header
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;---------------------------------------
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LDSAP EQU 0 ; Offset to destination Service Access Point (SAP)
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IGBIT EQU 0 ; I/G = 0 if Individual DSAP, = 1 if Group DSAP
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LSSAP EQU LDSAP+1 ; Offset to source SAP
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CRBIT EQU 0 ; C/R = 0 if Command, = 1 if Response
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LCtrl EQU LSSAP+1 ; Offset to LLC CONTROL field (see below)
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LHdrSize EQU LCtrl+1
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LInfo EQU LHdrSize ; Offset to LLC Information
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GlobalSAP EQU $FF
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NullSAP EQU 0
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;---------------------------------------
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; CONTROL field bits for 802.2 Type 1 LLC Protocol Data Units (PDUs)
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;---------------------------------------
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UI EQU %00000011 ; value for "Unnumbered Information" (P/F bit must be 0)
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XID EQU %10101111 ; mask for "Exchange Identification" (P/F bit may be 0 or 1)
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TEST EQU %11100011 ; mask for "Test" (P/F bit may be 0 or 1)
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PFBIT EQU 4 ; P/F = 0 if Poll (command), = 1 if Final (response)
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;---------------------------------------
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; XID information field
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;---------------------------------------
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XIDformat EQU %10000001 ; indicates IEEE basic format
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XIDinfo1 EQU %00000001 ; indicates Type 1 AND Class I LLC
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XIDinfo2 EQU %00000000 ; receive window size = N/A
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XIDinfoSz EQU 3 ; number of bytes in an XID response
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;---------------------------------------
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; Sub-Network Access Protocol (SNAP) packet header
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;---------------------------------------
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SType EQU 0 ; 5-byte protocol discriminator
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SHdrSize EQU SType+5
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