Cirrus Logic AN83 - Manual (Page 51)

AN83
AN83REV3 51
Adapter Configuration Word
Bits 15-13 Reserved (set to 0)
Bits 12-11 Optimization Flags
Used to specify the platform’s OS configuration to the driver. Each driver configures the
CS8900A for optimum performance based on the platform’s OS and driver architecture
(NDIS 2X, ODI, NDIS 3X, etc.). Default is DOS (single threaded OS).
Bits 10-8 Reserved (set to 0)
Bit 7 DC to DC Converter Polarity
Refer to “10BASE-2 Interface” on page 27. (Must be initialized by OEM before shipping
adapter.)
Bit 6-5 Media Type In Use
Specifies the type of media the driver should use (10BASE-T, AUI, 10BASE-2) or if driver
should auto-detect media in use. Default is auto-detect.
Bit 4 Adapter Provides LA Decode Circuitry
Specifies the presence of LA decode circuitry on the adapter. Refer to “Extended Memory
Mode” on page 31. (Must be initialized by OEM before shipping adapter.)
Bit 3 Adapter Provides HW Standby Circuitry
Specifies the presence of hardware standby circuitry on the adapter. Refer to the CS8900A
Data Sheet. (Must be initialized by OEM before shipping adapter.)
Bit 2 Adapter Provides 10BASE-2 Circuitry
Specifies the presence of 10BASE-2 circuitry on the adapter. (Must be initialized by OEM
before shipping adapter.)
Bit 1 Adapter Provides AUI Circuitry
Specifies the presence of AUI circuitry on the adapter. (Must be initialized by OEM be-
fore shipping adapter.)
Bit 0 Adapter Provides 10BASE-T Circuitry
Specifies the presence of 10BASE-T circuitry on the adapter. (Must be initialized by OEM
before shipping adapter.)
EEPROM Revision
Specifies the revision level of the format definition used by this EEPROM. A value of 0 indicates the first
revision level, a value of 1 indicates the second revision level, and so on.