Inside Macintosh: Devices /

Chapter 1 - Device Manager / Device Manager Reference

Device Manager Functions / Writing and Installing Device Drivers

Stash

You can use the Stash routine to store the next character from the data buffer.

DESCRIPTION

The Stash routine places the character in register D0 into the data buffer pointed to by the ioBuffer field of the parameter block of the pending request and increments the ioActCount field by 1. If the ioActCount field equals the ioReqCount field, this routine sets bit 15 of register D0. After stashing the last byte requested, the driver should jump to the IODone routine.

ASSEMBLY-LANGUAGE INFORMATION

Registers on entry
A1	Pointer to DCE
D0	Character to stash

Registers on exit
D0	Bit 15 = 1 if this is the last character in the buffer

Jump vector
JStash