AMX 68000 User Manual download pdf (Page 85)

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.

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AMX 68000 User Manual Page 85