From: gneuner2@nospicedham.comcast.net   
      
   On Sun, 4 Dec 2022 03:28:17 -0800 (PST), Paul Edwards   
    wrote:   
      
   >On Tuesday, November 29, 2022 at 5:08:37 AM UTC+8, anti...@nosp   
   cedham.math.uni.wroc.pl wrote:   
   >   
   >> Concerning debugging, integrated debug support is relatively   
   >> late, but there were external circuits that could single   
   >> step the processor, stop it on access to some specific   
   >> address and similar. High-end systems on this sort were   
   >> expensive, but established company could easily afford   
   >> them.   
   >   
   >By "integrated debug" I assume you mean things like   
   >the TF triggering an interrupt. That doesn't sound like   
   >something complicated. Is there a reason for it to be   
   >"relatively late"?   
   >   
   >Thanks. Paul.   
      
   I assume (perhaps wrongly) that the poster is referring to JTAG.   
      
   JTAG was developed originally in the 1980's, but it was not widespread   
   or really affordable to small developers really the mid/late 2000's.   
      
   Some people do consider ~15 years ago to be 'recent'.   
      
   George   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)