Hitachi HITAC 10II

The HITAC 10II was the successor of the HITAC 10 minicomputer developed by Hitachi, and was announced in 1973. Although the 16-bit word (32-bit words: optional) architecture was unchanged, the size was smaller than the previous HITAC 10 due to the use of MSI (mid-scale integrated circuits), a switching regulator and large printed circuit boards. The system could also be rack-mounted. Memory capacity of the magnetic core ranged, as before, from 4 Kword to a maximum of 32 Kword, and higher speed was achieved with a cycle time of 0.9 microseconds and an addition/subtraction speed of 1.8 microseconds.