UM82C86

This is an ISA AT Card featuring:

• 1 IDE port
• 1 floppy port
• 2 serial ports
• 1 parallel port
• 1 game port

The card was part of a 486DX66.

It has two ICs:

• UM82C863F
• UM82C865F

The PCB is marked with TK-82C863/865-2J-D02

There is a jumper block:

Jumper	Position		Description
	1-2	2-3
JP1	COM2	COM4	Serial port 2 switch
JP2	Enabled	Disabled	Serial port 2
JP3	Enabled	Disabled	Game port
JP4	COM1	COM3	Serial port 1 switch
JP5	LPT1	LPT2	Parallel port switch
JP6	Enabled	Disabled	Serial port 1
JP7	Enabled	Disabled	Floppy Controller
JP8	Exist	Not Exist	Other HDC
JP9	Enabled	Disabled	IDE HDC
JP10	Enabled	Disabled	Parallel port

And two additional jumpers:

• J1: IDE IOCHRDY (OPTIONAL)
• J2: HD LED

COM1 and 3 use IRQ 4, and COM2 and 4 use IRQ 3.

If this IO Card is the only HDC in your computer, then the switch JP8 must be at NOT EXIST.

Thanks to the info I found here.

The card may be of interest because:

• it has an old floppy controller (which is important for floppy imaging)
• it has an old parallel port (for use with an X1541 cable)

The difficulty is to avoid IRQ conflicts. How to disable the on board devices in pentium-age PCs in favour of this card?