Commodore Amiga A500 - Janus.Library

Section 4.3
Janus.Library
PREFACE
THE PUBLIC ROUTINES
Contents
Descriptions
This is a brief description of the janus code. This code supports low
level access to the
')anusw system -the link between a PC and an
Amiga.
m AllocJanusMem
m CheckJanuslnt
m CleanupJanusSig
m FreeJanusMem
m GetJanusStart
m GetParamOffset
m JBCopy
m JanusLock
m JanusMemBase
m JanusMemToOffset
m JanusMemType
m JanusUnLock
m SendJanuslnt
m SetJanusEnable
m SetJanusHandler
m SetJanusRequest
m SetParamOffset
m SetupJanusSig
The code is packaged as a library (specifically ')anus.library"), which
is loaded during Autoconfig procedure.
All routines that return a value return it in DO. There is a link library
for C routines,
'j'lib.lib".
oldHandler = SetJanusHandler( jintnum. intserver )
DO A1
This routine sets up an interrupt handler for a particularjanus inter-
rupt. The old interrupt is returned. A null means that there
is no in-
terrupt handler. If there is no interrupt handler then interrupts not
will be processed for that
jintnum.
oldEnable = SetJanusEnable( jintnum, newvalue )
DO D 1