-> I have been using OS/2 to run my BBS since feb. 1996 and have yet to
-> find a DOS program that doesn't work under OS/2+DOS.

Borland C++ 3.1 fails.

-> The BBS is running under Warp 4 FP12.

FP12 seems good here too. But I had to use IBM1S506.ADD from MCP2 to get
my SIS IDE controller using UDMA.  And the IBM com.sys driver from MCP2
works with my PCI serial card.

Running a stress test with SIO (1.60d) shows that it uses 100% of the
CPU on an inbound transfer at 115200. The IBM com.sys only uses 3% on
the same test. SIO gives the app many small packets, hammering the CPU.

--- PCBoard (R) v15.4/M 250 Beta