From: t1000@rogerwilco.org   
      
   On Wed, 18 Jul 2007 15:48:17 -0600, Mike Y wrote:   
      
   >   
   > "Mark Whitlock" wrote in message   
   >   
   >> This may be the problem,   
   >>     The Tandy 1000 series had different BIOS tables that are over-   
   >> ridden   
   >> By DOS. Do you have the Tandy version of DOS installed on the hard   
   >> drive ? The standard version of DOS will most likley conflict with at   
   >> least the sound vectors. It seems like you have MS-DOS installed.   
   >> The IRQ should be fine as the jumper redirects the *LINES* and the   
   >> controller couldn't give a hoot about the actual vector, it just sends   
   >> the   
   >> pulse. The Tandy specific version of dos should be available on the   
   >> web.   
   >   
   > I put generic MS-DOS 5.0 on my Tandy 1000 with no problems.  Well,   
   > other than the fact that I lost some Tandy 'enhancements' like the CGAjr   
   > modes from BASIC, but programs that used them and had it 'built in' were   
   > fine.  In fact, with just a little bit of fudging, I even got the light   
   > pen   
   > to work   
   > and had a program that would bring up a 'big text' list of kids games   
   > that   
   > my kids could use the light pen to pick and choose from.   
   >   
   > I never saw any problems with sound.  Same thing as with the 'jr'   
   > graphics.   
   > If the programs supported it, it worked, but it was missing from the   
   > generic   
   > GWBASIC.   
   >   
      
   As Mike says, standard PC/MS-DOS seems to work fine on these Tandy's, for   
   me anyway.  I've used PC-DOS 3.3, MS-DOS 3.1 and the originally supplied   
   Tandy version of MS-DOS 2.11 without any difficulties over the years.  Of   
   course, I'm booting them from floppy since that's been the only way with   
   no hard disk.   
      
   Mark, I may not have described the situation, originally, as clearly as I   
   should have.  Please understand that the problems I'm experiencing are   
   well before an attempt to *boot* DOS from either the hard disk or the   
   floppy.  My system will generally hang as soon as the POST/pre-boot   
   hardware discovery sequence 'touches' the hard disk.  In all of my efforts   
   so far, I'm still trying to boot from my Tandy 2.11 DOS floppy, not the   
   hard disk.  The only reason I referenced the fact that I have PC-DOS 3.3   
   on the hard disk was to evidence the fact that the hardware   
   (disk+controller) works fine in a more 'ordinary' system, which would   
   suggest looking elsewhere for the problem.   
      
   I should further re-report that I have dug up two machines, both 1000A's,   
   both with BIOS 01.01.00.  I mispoke (mis-wrote?) earlier when I stated   
   that they were identically configured.  Turns out that the first machine   
   (that started this whole mess!) has the PLUS memory expansion board with   
   512KB and RS-232 daughter board.  Machine #2 has the simpler expansion   
   board (25-1004) with a maximum of 256KB installed.  In both cases, I   
   cannot locate anything that looks like a PAL at socket U14 on either   
   board, so those references about PAL replacements on the oldskool website   
   still have me very confused.  Anyway, same results with both machines, and   
   that's why I'm starting the suspect that the 01.01.00 version of the BIOS   
   did not fix the DMA issue after all.  Both machines have that particular   
   BIOS, which has been noted as the 'fixed' BIOS (to allow proper DMA with   
   hard disks) with no further updates.  And now I've tried multiple   
   controllers (but, yes, the same brand/model), multiple hard drives, in two   
   different machines, with two different models of memory/DMA boards, with   
   the same no-go results.   
      
   Anyway, still curious to hear from *anyone* that has installed a   
   non-Tandy-kit hard disk in a 1000A.  I'd like to know what controller they   
   used.  But, on the other hand...if someone offered me a Tandy hardcard (of   
   any capacity) I'd surely jump at the chance!  ;)   
      
   As interesting developments occur, I'll post news of my progress.   
      
   - Jared   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)