🚀 go-pugleaf

This is a slightly revised (more detailed) version of my question of 
yesterday.

For only $30, a store around here is selling a Precision Instruments
High Speed Controller Card (ISA Bus, 16c550), supporting 2 16c550
serial ports, an ecp/epp parallel, floppy and game port, etc...

I bought it because my old 386sx has an 8250 uart. That's the only 
reason I got it.  I thought i could
just plug it in (and disable the comm port on my motherboard).
Well, it's easy enough to disable the comm port on the MB with jumper
switches: i've done that before.   But i plugged in the card, attached
the external modem to the serial port, turned on the pc, and it 
wouldn't boot up: the A-floppy drive light stayed continuously lit
and everything froze after the first second of turning it on (no hard
drive action, either).  I took the card out, and it's fine.  

It must have something to do with interrupts or the fact that
the card is also an IDE controller (that may conflict with the
HD controller card i already have plugged in--not IDE, actually). 

But the user manual doesn't show any way to change any settings or jumpers
on this new card, at least i can't see any way.
The manual (a one page sheet) only says (in CAPS IS WHAT
THEY SAY;  i put my comments in lower case): 

KEY FEATURES:

1.  ......ISA IDE PORT CAN BE SELECTED AS ENABLED OR DISABLED.
(my question is: how?  There's nothing on the card to change).


2. SERIAL PORTS EQUIP (that's they're spelling) with 16-byte fifo and are
software compatible with 16c550

(i assume the above means that there is a 16550 chip on the serial
ports!).

3. ISA IDE PORT CAN BE SELECTED AS PRIMARY IDE CHANNEL OR SECONDARY

...then a more things, not relevant.

JUMPER SETTINGS:

This is wierd.  All it says is:

ISA LED:  IDE DRIVE LED INDICATOR  (what does this mean?  I know what 
led usually means, but..)  

JRD & JWR FOR FUTURE USE

JUMPER ARRAY: followed by four columns:

PIN      DEFINITION     DEFAULT     OPTION

Then there are letters under the pin column, definitions like "ISA IDE 
PORT EN/DISABLE, default's like "ENABLE (H)", and options like "DISABLE (L)".


That's it!  If i could, i would disable anything related to IDE drive, since
i don't want that interfering with my hard drive or floppy (both driven
by non-ide controller cards in my pc).  But there's nothing at all on this 
new controller card that can be "set" or "adjusted", at least as far
as i can see.   I know that some internal modems let you change pin settings
on the card by pulling out little pins and placing them somewhere else.
This has nothing like that (unless i'm not seeing it), and i just stared
at it for about 30 minutes!.  SHOULD THERE DEFINITELY BE SOMETHING ON THE
CARD (A SWITCH OR SOMETHING, OR PINS) TO DISABLE THE IDE PART OF IT?

Well, all i know is, it's not like just plugging in an internal modem
(which always works).