This motherboard was manufactured by Quality Research Company of Spokane Washington in the early 1980s. The board is same size as a SWTPC motherboard and will fit in a standard SWTPC chassis.
The I/O address range is fully decoded and set to the standard 6800 space starting at $8000. By installing optional switches the I/O range can be moved to $E000 (for the 6809) or any other location. The I/O space is set to 4 address per slot.
Photo Top high resolution (JPG 1349k)
Photo Bottom high resolution (JPG 1911k)
