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Format of MAC Service-Specific Characteristics Table

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Offset Size Description

00h

WORD

length of table in bytes

02h

16 BYTEs

ASCIZ MAC type name, "802.3", "802.4", "802.5", "802.6", "DIX", "DIX+802.3", "APPLETALK", "ARCNET", "FDDI", "SDLC", "BSC", "HDLC", or "ISDN"

12h

WORD

length of station addresses in bytes

14h

16 BYTEs

permanent station address

24h

16 BYTEs

current station address

34h

DWORD

current functional adapter address (00000000h if none)

38h

DWORD

pointer to multicast address list

3Ch

DWORD

link speed in bits/sec

40h

DWORD

service flags (see #01439)

44h

WORD

maximum frame size which may be both sent and received

46h

DWORD

total transmit buffer capacity in bytes

4Ah

WORD

transmit buffer allocation block size in bytes

4Ch

DWORD

total receive buffer capacity in bytes

50h

WORD

receive buffer allocation block size in bytes

52h

3 BYTEs

IEEE vendor code

55h

BYTE

vendor adapter code

56h

DWORD

pointer to ASCIZ vendor adapter description

5Ah

WORD

IRQ used by adapter

5Ch

WORD

transmit queue depth

5Eh

WORD

maximum supported number of data blocks in buffer descriptors

60h

N BYTEs

vendor-specific info

See Also:

#01440