COM4/IRQ2 w/FAS 2.08

[Jose L. Gomez-Rubio]

Anyone know what it takes to make Xenix/386 2.3.2 COM4/IRQ2 serial port
to work?  Meaning, I can talk with my modem at COM3/IRQ5 but not with
COM4/IRQ2.

I'm using FAS 2.08.  I followed the instructions in the INSTALLATION notes
for using 4 ports for XENIX (editing /usr/sys/conf/master).

I've modified the fas_vec array to include vectors 0x4, 0x3, 0x5, and 0x9.
fas_port array is initialized as 0x3f8, 0x2f8, 0x3e8, 0x2e8.  I've also
added MC_SET_OUT2 to the fas_mcb array, and an extra modem control flag to
fas_modem array.  Same for fas_flow array.  Extra zero added to fas_ctl_port
and fas_ctl_val array.

I've even modified /usr/sys/conf/io/sioconf for COM3 & 4.

Then ran ./link_xenix and ./hdinstall.  FAS 2.08 recognizes the UARTs but
Xenix doesn't know about COM4/IRQ2.

Thanks for the help.
--
gomez at enuxha.eas.asu.edu