From: kunst AT prl DOT philips DOT nl
Subject: Re: PDCurses's demo problem.
To: mbsfptt AT menhpd DOT eng DOT man DOT ac DOT uk (T K Tsai)
Date: Mon, 31 Jan 1994 18:21:58 +0100 (MET)
Cc: djgpp AT sun DOT soe DOT clarkson DOT edu (DJGPP users list),
        mark AT snark DOT itc DOT gu DOT edu DOT au (Mark Hessling)


TzeKih Tsai (mbsfptt AT menhpd DOT eng DOT man DOT ac DOT uk) writes:
> 
> Hi,
>   I have got a problem with PDcurses.  I just download it and compile it
> with djgpp 1.11m2 using Contura 4/25 and dos6.  Everything seem to be okay, 
> and it generate all the demo programs without any error.  However it did 
> give some warnings about the include file <time.h> of having empty 
> declaration.  

The <time.h> has not been updated in dj111m2. I've sent DJ already
a patch for fixing the mentioned problem. You should change one line
in <time.h> to get rid of the warnings:

OLD:   #ifndef _stddef_h        (in <time.h> )
NEW:   #ifndef _STDDEF_H


> Apart from that it produce the neccessary .exe files for the 
> demo programs.  When I try to execute one of the demo, firework, I got the 
> following error,
> 
> Unsupported INT 0x0d
> General Protection Fault at eip=7717
> eax=0000fe00 ebx=00000008 ecx=00000607 edx=00001800 esi=00000000 edi=00000000
> ebp=7ffffb1c esp=7ffffafc cs=d8 ds=48 es=48 fs=48 gs=48 ss=48 cr2=000034e0
> Call frame traceback EIPs:
>   0x00007717
>   0x00004273
>   0x00002ffd
>   0x0000191d
>   0x000011bb
> 
> In fact non of the demo work on my computer.  Can anyone help ?

You have to disable (or remove) the DESQview shadow buffer routine, 
which uses int86x(), in PDCurses source file 'private/_queryad.c' as follows:

-------------------------------------------------------------------------------
                /* Check for DESQview shadow buffer */
/*
        regs.h.ah = 0xfe;
        regs.h.al = 0;
        regs.x.di = _cursvar.video_ofs;
        segs.es   = _cursvar.video_seg;
        int86x(0x10, &regs, &regs, &segs);        ?????
        _cursvar.video_ofs = regs.x.di;
        _cursvar.video_seg = segs.es;
*/
-------------------------------------------------------------------------------

When you recompile this file (with the above patch), and rebuild the 
PDCurses library, all programs work correctly with DJGPP 1.11m2. 
I use it myself...

PS The programs (with the patch) even work inside DESQview ;-)

> I am new to C programming.  Thanks in advance.
> 
> TzeKih Tsai
> Simon Engineering Building
> Univ. of Manchester.
> 

Regards,

 .^^^^^^^^           _____________________________________
 |      |          / Pieter Kunst (P.J.)                   \
 |  _  _|        /   Philips Research Laboratories,          \
.--(o)(o)      /     Building WY3, Prof. Holstlaan 4,         \
|@      _)   /       5656 AA  Eindhoven, The Netherlands.      |
  | ,___|   /        e-mail: kunst AT prl DOT philips DOT nl             /
  |   /     \_______________________________________________/
  /____\

===============================================================================

The latest version of PDCurses is 2.1 and can be obtained from:

  site:  ftp.gu.edu.au    132.234.1.1
  files: /src/PDCurses/pdcurs21.zip

To compile the whole library with DJGPP 1.11, you'll need a copy
of DMAKE as well, which can be obtained from:

  site: plg.uwaterloo.ca (129.97.140.10)
  file: pub/dmake/dmake38-msdos-exe.zip

===============================================================================