Hi!
Forwarding this question from Paul Edwards aka mutazilah on gmail on freedos-user, in case there are more developers here. Are there? Given that CWSDPMI uses a different API, that DPMI16BI with RTM are 16 bit, that DPMIONE provides mainly bare DPMI, that there are other extenders I do not know about, I would indeed be curious what the landscape of DOS extenders is now and has been in the 1990s :-) Regards, Eric Hi all. A short time ago I was made aware of this: http://dos32a.narechk.net/manual/index.html which is a 32-bit INT 21H AH=40H call that does a "write". Exactly the same as 16-bit INT 21H, except with 32-bit registers. Given that Microsoft don't have such a thing, it means that anyone who created such an API got to make up registers themselves. In this case, bx was changed to ebx etc, so everything seems sensible. But I'm wondering how many different variations of this there are. Or did DOS/4GW set the industry standard and almost everyone copied them? In particular I'm interested to know if EMX 0.9d copied them. I know that EMX internally uses a 32-bit a.out file, but what I'd like to know is if that a.out file does an INT 21H above (in 32-bit protected mode), does the EMX DOS extender handle that (and obviously end up doing one or more 16-bit INT 21H calls), or does EMX only support INT 31H (DPMI) or something else? Thanks. Paul. _______________________________________________ Freedos-devel mailing list Freedos-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/freedos-devel
