AMX 68000, Target Guide cjksivtx cjksivtx

AMX 68000 Target Guide

DAK

B-23

cjksivtx cjksivtx

Purpose Exchange an Entry in the AMX Vector Table

Used by n Task n ISP n Timer Procedure n Restart Procedure n Exit Procedure

Setup Prototype is in file

CJZZZIF.H.

#include "CJZZZ.H"

CJ_ERRST CJ_CCPP cjksivtx(int vector,

CJ_ISPPROC newproc,

CJ_ISPPROC *oldproc);

Description vector is the processor vector number (0 to 255).

Vectors 12, 16 to 23 and 59 to 63 are reserved by Motorola.

newproc is a pointer to the new Interrupt Service Procedure.

oldproc is a pointer to storage for the previous Interrupt Service

Procedure pointer (or exception service procedure pointer) retrieved

from the AMX Vector Table.

Interrupts o Disabled o Enabled o Restored

Returns Error status is returned.

CJ_EROK Call successful.

*oldproc contains the previous Interrupt Service Procedure pointer (or

exception service procedure pointer).

Errors returned:

For all errors, *oldproc is undefined on return.

CJ_ERNOACCESS AMX Vector Table is not accessible.

AMX was launched with access to its

Vector Table denied.

Restrictions You must NOT use this procedure to alter the task trap vectors (vector =

CJ_PRVNZD, CJ_PRVNCH or CJ_PRVNTV). Use cjksitrap for that purpose.