[comp.sys.ibm.pc] Running Non-Dedicated Server on PS/II

jrb@nbires.nbi.com (John Barr) (11/03/88)

	I'm having problems running a non-dedicated file server 
	on the PS/II (MS-Dos). We originally wrote it for the 
	AT and it has reached a somewhat mature state in both
	functionality and reliability. 

	It runs off of both INT 28 and INT 70 on the AT. We had hoped
	that this would also work on the PS/II but apparently our checks
	to determine if it is safe to make DOS calls when entered via
	INT 70 are not sufficient on the PS/II.

	Currently when entered via INT 70 we check to see if

		1. We are re-entering ourselves/netbios/tcp.
		2. We were in IO.SYS (interrupted segment <= 070h)
		3. We were in an INT 21 call.
		4. We were in an INT 13 call.
		5  We were in ROM (interrupted segment >= 0a000h)
		6. We were in a Dos critical section.

		before we attempt any Dos calls.


	I was wondering if anyone had any ideas as to what we were missing.