The Quadram Quadboard was an 8-bit ISA RAM expansion card used in XT class machines. The card also featured games (joystick) and printer ports, and a real-time clock (backed by a Varta 2/100 DKO 2.4V PCB mounted battery).

'Quadram now gives IBM PC and XT users greater flexibility and more expansion possibilities with Quadboard. Regardless of whether the IBM Personal Computer is being used at home or at the office, Quadboard can solve a major problem many users have. Because Quadram has taken 9 of the most-needed IBM PC functions and combined them all onto one board requiring just one expansion slot. This leaves the IBM with the rest of its slots free for future expansion.

Quadboard contains a serial RS-232C communications port, a Centronics compatible parallel printer port, up to 384K of RAM, chronograph (real-time clock/calendar), game port, QuadRAM Drive (RAM Disk) software, MasterSpool (software print spooler), MasterCache (disk caching), and Qswap (a line printer swap program).
A DIP Switch and jumper pins provided on the Quadboard allow you to program the board for the specific needs of your system.

The parallel and serial ports are functionally identical to IBM's.

The chronograph {extremely accurate clock/calendar) uses a crystal controlled integrated circuit with a life time rechargeable battery.
And the game port is fully IBM-compatible. It can be used with game paddles or joysticks. Complete software instructions and descriptions are included in the "QuadMaster II Operations Manual."'

Card Type Multi-I/O card
Maximum Onboard Memory 384KB DRAM
I/O Options Game port, parallel port, serial port
Data Bus 8-bit ISA

Our board has a serial number of 24304791 Rev 6K and is complete with the original box and manuals.  The manuals can be downloaded as PDFs here:

Quadboard Operation Manual 

Quadmaster II Operations Manual