Legacy Document

Important: The information in this document is obsolete and should not be used for new development.

Chapter 1 - Device Manager / Device Manager Reference

Device Manager Functions / Writing and Installing Device Drivers

Fetch
You can use the Fetch routine to get the next character from the data buffer.

DESCRIPTION
The Fetch routine gets the next character from the data buffer pointed to by the ioBuffer field of the parameter block of the pending request. It increments the ioActCount field by 1. If the ioActCount field equals the ioReqCount field, this routine sets bit 15 of register D0. After receiving the last byte request, the driver should jump to the IODone routine.
Registers on entry
A1 Pointer to the device control entry

Registers on exit
D0 Character fetched; bit 15 = 1 if this is the last character in the buffer

Jump vector
JFetch