🚀 go-pugleaf

Hi Salty

I must confess that either I don't understand anything about PM or you still
don't know what I mean. 
By PM I mean :
When you switch to PM from Real Mode all your segment registers don't work
anymore the way they did before. Now you have GS and LS (don't remember
exactly ) and special segments (one for each register) that show how memory is
arranged. Then you have segment register for interrupts (IS, perhaps) and
segment that show where your interrupt programs are. Besides all old interrupt
vectors such as 01,02,08,09 are now reserved for special events such as
different violations of memory and port access and many others. If you try to
get access to memory using,say DS, CPU calculates physical address in different
way than in Real Mode. Intel386 CPU has additional virtual mode for 8086.
I'm sure that most of what I just said is not correct 'cause I read a book
about PM almost a year ago and I've never tried to write anything for PM. But
considering all these facts you must admit that program , written for Real
Mode, would not work in PM, especially my program which allows to use standard
debuggers while game is running.
I'd like to repeat again that I didn't try to crack DOOM, I tried to trace it
and this seemed to be successful.
So if you have any comments I'll be happy to hear from you.

Sincerely yours, PVP

-- 
Oleg Pestovsky
p...@iastate.edu