Path: utzoo!attcan!uunet!lll-winken!ames!hc!pprg.unm.edu!unmvax!indri!polyslo!vlsi3b15!lehi3b15!lafcol!pilgrimk
From: pilgrimk@lafcol.UUCP (Kenwyn A. Pilgrim)
Newsgroups: comp.lang.pascal
Subject: Re: Drive not ready message
Summary: has to do with INT24
Message-ID: <878@lafcol.UUCP>
Date: 27 Apr 89 17:33:25 GMT
References: <2215@botter.cs.vu.nl>
Organization: Academic Computer Center, Lafayette College
Lines: 22

In article <2215@botter.cs.vu.nl>, cjveenm@tjalk.cs.vu.nl (Veenman CJ) writes:
# 
# 	Question:
# 
# When you try to open a file for reading or writing and that file is
# on a drive which isn't ready yet, you will get a message that tells you
> about your mistake.
# 
# Using Turbo Pascal 3 this will happen after the RESET(file) or 
# REWRITE(file), but in TP4 it won't. At least when I am doing so.
# 
# Why is that?
# 

TP40 rets IN24 to its own interrupt procedure, hence 
Disk errors (Drive not ready, file not found, etc) would be treated
like any other I/O error. 
If you don't like this then simply reset INT24 to its original interrupt!
SetIntVec($24, SaveInt24);
See p291. of TP40 manual

-Kenwyn