Important: The information in this document is obsolete and should not be used for new development.
BOn
You can use theBOn
procedure to turn on the power to serial port B.
PROCEDURE BOn;DESCRIPTION
TheBOn
procedure switches on power to the SCC, the -5 volt supply, and the serial driver chips.ASSEMBLY-LANGUAGE INFORMATION
The MPW development system provides an assembly-language macro to execute theBOn
routine. That macro calls the_SerialPower
trap. To call the_SerialPower
trap directly, you must first put a longword routine selector in the D0 register. ForBOn
, the routine selector is $0.