🚀 go-pugleaf

In article <10210006@hpspcoi.HP.COM> dlow@hpspcoi.HP.COM (Danny Low) writes:
>>Is there a good low-level debugger for DOS machines that will take over
>>the system when it crashes?
>
>There are ICE machines for Intel based PCs. Intel makes them as
>does Hewlett Packard. The HP 64000
>will support all Intel processers (except the 486) up to 25MHZ. There are
>also PC hardware debugging boards that snoop the SPU. The Atran Probe is one
>that comes to mind. If you are willing to pay the money there are some
>very good low-level debuggers for DOS machines that are just what you
>are looking for.

If you're on a really tight budget, it might be enough to install an NMI
breakout switch.  The current issue of PC Techniques gives details; all
it involves is connecting a normally open momentary contact switch from 
one of the bus lines (A1, I think, but don't trust my memory!) to ground.
With a debugger like Borland's Turbo Debugger fielding NMI interrupts,
this might let you break out of an infinite loop even with interrupts 
disabled.

Duncan Murdoch