From: me@yyzkevin.com   
      
   Okay,  my first attempt at inspecting disassembled  bios code moved me a step   
   forward, may still all be pointless though.    not sure how this applies to   
   the 286 planar, but more important is  A3 connected to Pin31 on J11 in a model   
   30 286? it is not on    
   the schematic so that is not promising.   I have not acquired a 286 model 30   
   yet, still working on that.   
      
   It seems bit0    of   port 65h   controls if   320-32f is masked or not,      
   when set to 1    the io read/writes  to  0x32X  appear at J11 as expected with   
   cs1fx being properly asserted..          
      
   I do not see port 65h mentioned in my undocumented PC  book,     other    
   general references refer to it as part of the keyboard controller.      
      
   Now I can move onto phase2 of my  ps/2 crime spree.   
      
      
   On Friday, 14 July 2023 at 00:24:59 UTC-4, Kevin Moonlight wrote:   
   > I see from the planar schematic that Pin23 (CS1FX) on J11 is controlled by   
   Pin62 on U9 / 72X8203, which seems is the factory programed gate array so that   
   is a dead end for me.    
   >    
   > I guess this is a case of inspecting the bios if it is not already common   
   knowledge. It would seem the misuse of this connector and the unlisted A3 line   
   I was dreaming about may not be possible.   
   > On Thursday, 13 July 2023 at 20:29:57 UTC-4, Kevin Moonlight wrote:    
   > > I am working with my Model 30, 8530-021. I wanted to do some direct   
   interrogation to the hard disk registers, but when I attempt io read/writes to   
   320h - 32fh (using debug, or basic , etc) they do not actually get to the   
   drive no activity on cs1fx,   
   iow,ior etc, but when I run fdisk etc there is activity.    
   > >    
   > > Is there a secret way to access directly/unask/ and not through dos int?   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)