I found an old Quadram quadboard in my junk collection. This is a 256K (41256 DRAM) add in board for the 5150. Also includes a serial port (8250), a parallel port (8255) and a clock (some small 19-pin OKI chip). The board bears a copyright of 1982 and the chips have date codes in early 1983, so this is a very early critter. To my recollection, this was usable only on the 4.77MHz motherboards, but I could be mistaken. The original "wide" PC mounting bracket has been replaced with a conventional narrow one, so this board has probably seen duty in a clone. I can populate the board with DRAMs if necessary. I think I may even have a software diskette and manual for it, but I'm not completely certain. Let me know if you're interested. Cheers, Chuck