Subject: Re: ADT query-- ADTCHECK
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From: Rubywand <rubywand@swbell.net>
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Date: Mon, 27 Dec 1999 13:10:11 -0600
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Bart writes ...
> 
> >c:\a2\adt\adt 2 19200
> >
> >Which I guess is just telling ADT to use serial port 2 on the PC
> 
> -Did that.  Actually, I did it manually instead of a .bat file but
> it is the same..  Here is the main symptom if anyone can figgure it out:
> Everything seems loaded OK, ADT gives the Line1 Line2 Line3 screen on the PC
> side./  On the Apple side it is the standard ADT screen that looks like a
> modified speradsheet.  Now, whenever I issue "D" as in dir, the Apple's
> screen goes blank. An esc brings it back.
 ....

     One thing to check is that your ADT file is okay-- i.e. that it was
correctly transferred. Here is a short Applesoft BASIC program you can type in
and save on your ADT disk-- SAVE ADTCHECK-- which calculates a check sum.

 10  TEXT : HOME
 20  PRINT  CHR$ (4)"BLOAD ADT,A$4000"
 40  FOR I = 0 TO 2579
 50 Z = Z +  PEEK (16384 + I)
 55  IF I / 500 =  INT (I / 500) THEN  PRINT "CURRENT SUM= ";Z
 60  NEXT I
 70  PRINT "CHECKSUM= ";Z


     The results for ADT versions 1.21 and 1.22 are ...

   ADT (v1.21)      ADT(v1.22)

    76               76
    53958            53958
    101079           101079
    158919           158919
    224503           224504
    307268           307117
    313020           312869   <-- final value

     If you don't care about intermediate checks, leave out Line 55. The result
should be 313020 for v1.21; 312869 for v1.22.

     The check is not an absolute guarantee that ADT is not corrupted; but, if
the sum is 'correct', the odds are pretty good that ADT is okay.


     Other things to check are ...

o- ADT on the PC is started under DOS, _not_ Windows or a DOS window in
Windows-- i.e., if you normally start your PC under Win95/98, do a 'Restart in
MS-DOS mode' and run ADT under DOS

o- ADT on the PC is set to the correct COM port

o- Your baudrates on the A2 and PC match


     You may need to experiment with a lower baudrate. Like, you may need to go
to 9600 or 2400.



Rubywand