Legacy Document

Inside Macintosh: Devices /

Chapter 2 - Slot Manager / Slot Manager Reference

Low-Level Routines /

SFindSInfoRecPtr

This function is used only by the Macintosh Operating System.

FUNCTION SFindSInfoRecPtr (spBlkPtr: SpBlockPtr): OSErr;

spBlkPtr

A pointer to a Slot Manager parameter block.

<--	spResult	LongInt	A pointer to the slot information record.
-->	spSlot	SignedByte	The slot number.

DESCRIPTION

The SFindSInfoRecPtr function returns a pointer to the slot information record for a particular slot.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for the SFindSInfoRecPtr function are

Trap macro	Selector
_SlotManager	$002F

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
A0	Address of the parameter block
D0	$002F

Registers on exit
D0	Result code

RESULT CODES

noErr	0	No error
smNoMoresRsrcs	-344	Requested sResource not found

SEE ALSO

For information about the high-level routine for reading the slot information record, see the description of the SReadInfo function on page 2-61.