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Inside Macintosh: Devices /

Chapter 2 - Slot Manager / Slot Manager Reference

Data Structures

Slot Information Record

The Slot Manager creates a slot information record for each slot. This structure is defined by the SInfoRecord data type.

   TYPE SInfoRecord =               {slot information record}
   PACKED RECORD
      siDirPtr:       Ptr;          {pointer to sResource directory}
      siInitStatusA:  Integer;      {initialization status}
      siInitStatusV:  Integer;      {status returned by vendor }
                                    { initialization routine}
      siState:        SignedByte;   {initialization state}
      siCPUByteLanes: SignedByte;   {byte lanes used}
      siTopOfROM:     SignedByte;   {highest valid address in ROM}
      siStatusFlags:  SignedByte;   {status flags}
      siTOConstant:   Integer;      {timeout constant for bus error}
      siReserved:     PACKED ARRAY [0..1] OF SignedByte; 
                                    {reserved}
      siROMAddr:      Ptr;          {address of top of ROM}
      siSlot:         Char;         {slot number}
      siPadding:      PACKED ARRAY [0..2] OF SignedByte; {reserved}
   END;

Field Description

siDirPtr

A pointer to the sResource directory (described in "The sResource Directory" on page 2-12).

siInitStatusA

The initialization status code set by the Slot Manager. A value of 0 indicates the card is installed and operational. Any other value is a Slot Manager error code indicating why the initialization failed.

siInitStatusV

The initialization status code returned by the card's PrimaryInit routine in the seStatus field of the SEBlock parameter block (described on page 2-27). Negative values cause the card initialization to fail. Values in the range svTempDisable ($8000) through svDisabled ($8080) are used to temporarily disable a card. See "Enabling and Disabling NuBus Cards" on page 2-17 for more information.

siState

Reserved for use by the Slot Manager.

siCPUByteLanes

The byte lanes used by the declaration ROM.

siTopOfROM

The least significant byte of the address stored in siROMAddr.

siStatusFlags

Slot status flag field set by the Slot Manager. If the fCardIsChanged flag (bit 1) is set, the board ID of the installed card does not match the board ID stored in parameter RAM. Other flag bits are reserved.

siTOConstant

The number of retries that will be performed when a bus error occurs while accessing the declaration ROM. The default is 100.

siReserved

Reserved for use by the Slot Manager.

siROMAddr

The highest address in the declaration ROM.

siSlot

The slot number.

siPadding

Reserved for use by the Slot Manager.