HP 9000 216 - mainboard PN: 09816-66514B The HP 9000 216 is a single board computer based a 8 MHz CPU Motorola M68000. At right from CPU is 256 kB memory (32x 64x1 bit). The ROM is splitted into four circuits - odd upper and lower ROM and even upper and lower ROM. Only the lower ROMs are used. The connector (3x 32 pins) in the mainboard's centre provides connection to expansion boards. The HP-IB interface is based TMS9914 controller. Size is 262 x 228 mm.