Path: chuka.playstation.co.uk!news
From: "Matt Verran" <mverran@btinternet.com>
Newsgroups: scee.yaroze.freetalk.english
Subject: loading an exe and using Exec()
Date: Sun, 15 Apr 2001 10:23:17 +0100
Organization: PlayStation Net Yaroze (SCEE)
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Hi All

I spent the whole of yesterday puzzling over this yaroze problem. I'm trying
to load and execute an exe file from disk, which would allow yarozers the
ability to play update disks (gta london, beatmania 2, 3, 4, 5, etc) without
the original disk.

I used the following code to (I think) successfully load the yaroze boot
disk app and execute it:

if( CdSearchFile(0, "\\DTL_S30.35;1") == 0 )
   {
    printf("\n not found \n");
    }
  else
    {
    printf("\n found \n");

    exec_struct = CdReadExec( "\\DTL_S30.35;1" );

    result = CdReadSync(0, 0);

    printf("\n loaded, result:  %d    \n\n", result);

    if (result==0)
      {
      printf("\n executing \n");
      EnterCriticalSection();
      Exec(exec_struct, 0, 0);
      ExitCriticalSection();
      }
    }

But all the other disks I tried, FF8, OPM coverdisks, beatmania 2, first had
trouble with the CdSearchFile() function, they didn't find the file 100% of
the time. Then always failed at the CdReadExec/CdReadSync statements, I just
got timeouts.

I though it might be that the CdReadExec is trying to overwrite the current
code that is executing, but if I quit after the timeout and reexecute the
proggy it works fine.   I also wondered if the filesystem has to be reset
somehow if the disk is changed?

Yes I am using original black disks and know that any other type of CD can
only be used for audio. I also remembered to set the two strings correctly
(indicated by the CdSearchFile sometimes finding the file).

Anyone used these functions successfully, or able to point me to some other
yarozers site who has?

cheers
Matt