Legacy Document

Important: The information in this document is obsolete and should not be used for new development.

Chapter 2 - Slot Manager / Slot Manager Reference

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.

<--> spsPointer Ptr A pointer to a byte in declaration ROM.
--> spOffsetData LongInt The offset in bytes to desired pointer.
--> spByteLanes SignedByte The 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 macro Selector
_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
A0 Address of the parameter block
D0 $002C

Registers on exit
D0 Result code

RESULT CODES
noErr 0 No error
smNoMoresRsrcs -344 Requested sResource not found

Trap macro	Selector
_SlotManager	$002C

Registers on entry
A0	Address of the parameter block
D0	$002C

Registers on exit
D0	Result code

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<-->	`spsPointer`	`Ptr`	A pointer to a byte in declaration ROM.
-->	`spOffsetData`	LongInt	The offset in bytes to desired pointer.
-->	`spByteLanes`	SignedByte	The byte lanes used.

noErr	0	No error
smNoMoresRsrcs	-344	Requested sResource not found

Legacy Document

SCalcSPointer

DESCRIPTION

ASSEMBLY-LANGUAGE INFORMATION

RESULT CODES noErr0No error smNoMoresRsrcs-344Requested sResource not found

RESULT CODES
noErr 0 No error
smNoMoresRsrcs -344 Requested sResource not found