Cirrus Logic CRYSTAL LAN CS890 Technical Reference Manual page 53

Addr. Description
24h Adapter Configuration
Optimization Flags
Reserved
DC/DC Converter Polarity
Media Type in Use
LA Decode Circuitry
HW Standby
10Base-2 Circuitry
AUI Circuitry
10Base-T Circuitry
25h EEPROM Revision
26h Reserved
27h Mfg Date
Year
Month
Day
28-2Ah IEEE Individual Addr
2Bh Reserved
2Ch Reserved
2Dh Reserved
2Eh Reserved
2Fh Checksum
30h EISA ID (low word)
31h EISA ID (high word)
32h Serial No (low word)
33h Serial No (high word)
34h Serial ID Checksum
Marker Byte
LFSR Checksum
Table 3.2. Format of EEPROM the Driver Configuration Block (cont.)
AN83REV1
CS8900 Technical Reference Manual
Bit(s) Function
(Continued)
12-11 00 = Server, 01 = DOS Client, 10 = Multi-OS Client
10-8 Reserved for future use, set to 0
7 0 = Low enable, 1 = High enable
6-5 0 = Auto Detect, 1 = 10Base-T, 2 = AUI, 3 = 10Base-2
4 0 = Not Present, 1 = Present (Req'd for decode above 1MB)
3 0 = HW Standby not supported, 1 = HW Standby supported
2 0 = Not Present, 1 = Present
1 0 = Not Present, 1 = Present
0 0 = Not Present, 1 = Present
15-0 Revision number of the EEPROM format definition used
15-0 Reserved for future use, set to 0
15-9 e.g. 1011111b = 1995, 0000001b = 2001
8-5 e.g. 1b = Jan, 1100b = Dec
4-0 e.g. 1b = 1, 11111b = 31
47-0 Copy of words at 1C-1Eh
15-0 Reserved for future use, set to 0
15-0 Reserved for future use, set to 0
15-0 Reserved for future use, set to 0
15-0 Reserved for future use, set to 0
15-0 Word-wide checksum of words 1Ch to 2Fh (zero sum)
15-0 EISA ID bits[7-0], EISA ID bits[15-8]
15-0 EISA ID bits[23-16], EISA ID bits[31-24]
15-0 32-bit OEM assigned serial number, bits[15-8], bits[7-0]
15-0 32-bit OEM assigned serial number, bits[31-24], bits[23-16]
15-8 Constant 0Ah in high byte of checksum word
7-0 8-bit LFSR checksum of words 30h to 33h
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