Re: pds 7.1 dtr patch

 BBS: Inland Empire Archive
Date: 01-20-93 (19:52)             Number: 325
From: RICK PEDLEY                  Refer#: NONE
  To: JASON HUEBEL                  Recvd: NO  
Subj: Re: pds 7.1 dtr patch          Conf: (2) Quik_Bas
 On 01-19-93 Jason Huebel wrote to Jason Huebel...

 JH>  JH> Speaking of PDS 7.1, do you happen to know anybody who has a PDS
 JH> 7.1
 JH>  JH> DTR Patch so that the modem won't hang up when you exit a
 JH> program?

Here's a snippet from way back:

 BBS: The Wildcat Modem Zone BBS
Date: 02-18-92 (06:13)                Number: 6292
From: DONN BLY                        Refer#: NONE
  To: JOHN SNEERINGER                  Recvd: NO
Subj: PDS 7.1 DTR PATCH                 Conf: (13) QuickBasic

 => I asked a while ago if anyone had a PDS DTR patch, I
 => guess either no one has ever attempted communications
 => with PDS, no one owns PDS, or perhaps no one cares (g).
 => Probably the latter, but anyway, if anyone knows of a
 => way to patch the DTR problem in PDS, let me know.

I have a DTR patch for 7.0, but the critical information should be the
same for 7.1 (if it doesn't work for you, let me know (preferably via
NetMail since I usually don't frequent this echo) and I will track it
down for you).  As you know, to increase the efficiency of the
compiled code, several different libraries are used, and the patch
should be applied to all of the following:


Search for the sequence of:   B8 07 0C CD 21
      and patch it to read:   B8 07 0C 90 90
                                       ^^ ^^
Basically, you are just NOPing out the interrupt 21 call.

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