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Important: The information in this document is obsolete and should not be used for new development.

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Inside Macintosh: Devices /
Chapter 2 - Slot Manager / Slot Manager Reference
Low-Level Routines /


SCalcSPointer

This function is used only by the Macintosh Operating System.

FUNCTION SCalcSPointer (spBlkPtr: SpBlockPtr): OSErr;
spBlkPtr
A pointer to a Slot Manager parameter block.
<-->spsPointerPtrA pointer to a byte in declaration ROM.
-->spOffsetDataLongIntThe offset in bytes to desired pointer.
-->spByteLanesSignedByteThe byte lanes used.

DESCRIPTION
The SCalcSPointer function returns a pointer to a given byte in the declaration ROM of an expansion card.

ASSEMBLY-LANGUAGE INFORMATION
The trap macro and routine selector for the SCalcSPointer function are
Trap macroSelector
_SlotManager$002C

On entry, register D0 contains the routine selector and register A0 contains the address of the Slot Manager parameter block. When _SlotManager returns, register D0 contains the result code.
Registers on entry
A0Address of the parameter block
D0$002C
Registers on exit
D0Result code

RESULT CODES
noErr0No error
smNoMoresRsrcs-344Requested sResource not found

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© Apple Computer, Inc.
3 JUL 1996