From: t1000@rogerwilco.org   
      
   All right, all of you Tandy 1000 experts...here's one for you:   
      
   I'm trying to add a vintage hard disk to my vintage 1000A.  I know there   
   are   
   lot's of choices, even IDE or SCSI is a possiblity with these old systems,   
   but I'm trying to keep this all in the realm of mid-1980's tech.   
      
   My 1000A (BIOS 01.01.00) has seen the Intel 8088 replaced with a NEC V-20   
   CPU long ago, and has a PLUS Memory Expansion board installed with   
   512KB of RAM and the PLUS RS-232 daughter board in the left-most   
   (outside) slot.  Otherwise, the system is in it's original configuration.   
      
   I'm trying to add a 20MB MFM drive (a Seagate ST-225) using a Western   
   Digital WD1002S-WX2 controller.  I have tested both the controller and the   
   hard disk in a Leading Edge Model D PC clone, and confirmed that they   
   are fully functional.  I have cut the W7 hardwire trace on the solder-side   
   of   
   the WD controller, and jumpered pins 2-3 to select IRQ 2.   
      
   Here's what happens:   
      
   When booting up I see the normal MEMORY=640K message, then the   
   floppy drive spins with the drive select LED showing for a second, then a   
   pause, and then one or the other of:   
      
   A) The hard drive's LED lights up and stays on forever, and the system   
   hangs at that point and never boots.  CTRL-ALT-DEL is effective for a   
   warm reboot.   
      
   B) The hard drive's LED briefly flicks on and off, another pause, and then   
   the system boots from my boot floppy.  But any subsequent attempt to   
   access the hard drive results in the hard drive LED lighting up and staying   
   on, and the machine hangs forever.  A CTRL-ALT-DEL is effective for a   
   warm booting.   
      
   So, it seems that I don't have everything set up just right.  I'm at a   
   loss,   
   since all of my online research indicates that as long as I have the 01.01.   
   00 BIOS, the memory expansion board with DMA,  and use IRQ 2 on the   
   controller, it should "just work".   
      
   I was lucky to get my hands several WD1002S-WX2 controllers at the   
   same time, and I've tried all five of them (yes, I mod-ed each for IRQ 2),   
   with the same results.   
      
   Any ideas?   
      
   TIA,   
      
   Jared   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)