Legacy Document

Inside Macintosh: Devices /

Chapter 2 - Slot Manager / Slot Manager Reference

Slot Manager Routines / Accessing Expansion Card Parameter RAM

SPutPRAMRec

You can use the SPutPRAMRec function to change the values stored in a slot's parameter RAM.

FUNCTION SPutPRAMRec (spBlkPtr: SpBlockPtr): OSErr;

spBlkPtr

A pointer to a Slot Manager parameter block.

-->	spsPointer	Ptr	A pointer to an SPRAMRecord data structure (described on page 2-27).
-->	spSlot	SignedByte	The slot number.

DESCRIPTION

The SPutPRAMRec function allows you to change the values stored in the parameter RAM of a slot.

In the parameter block you point to in the spBlkPtr parameter, you specify the slot number with the spSlot field and provide the new parameter RAM values in a SPRAMRecord data structure pointed to by the spsPointer field.

The SPutPRAMRec function copies the information from the six vendor-use fields into the parameter RAM for the slot. This function does not copy the boardID field, which is Apple-defined.

ASSEMBLY-LANGUAGE INFORMATION

The trap macro and routine selector for the SPutPRAMRec function are

Trap macro	Selector
_SlotManager	$0012

You must set up register D0 with the routine selector and register A0 with 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	$0012

Registers on exit
D0	Result code

RESULT CODES

noErr	0	No error
smEmptySlot	-300	No card in this slot