TTL logic circuit card (for FACOM 230-60)

TTL logic circuit card

TTL logic circuit card



Manufactured in 1968
Manufactured by Fujitsu Ltd.
Owner Kyoto University, Academic Center for Computing and Media Studies (ACCMS)
Location of historical materials Kyoto University, Academic Center for Computing and Media Studies (ACCMS)
Sakyo-ku, Kyoto 606-8501, Japan
Visitor information Open to the public (Reservation required)
Contact Kyoto University, Academic Center for Computing and Media Studies (ACCMS)
http://www.media.kyoto-u.ac.jp/


This is a logic circuit card for a multi-processor FACOM 230-60, which fully adopted monolithic ICs and had the highest performance at that time in Japan. FACOM 230-60 had not only better performance by 4 to 10 times than its preceding model FACOM 230-50, but also enhanced online data processing function. The first unit was deployed in Kyoto University, when its Data Processing Center was founded in 1969.

FACOM 230-60 had a high-speed magnetic core storage of up to 262,144 words (one word consists of data 36 bits, flag 4 bits, parity 2 bits, totally 42 bits) with core size of 20 mil and cycle time of 0.92μs, and also a large-capacity magnetic core storage of up to 86,432 words with cycle time of 6μs. Its computing performance is 1.26μs and 4.06μs addition/subtraction and multiplication for fixed-point arithmetic, and 2.27μs and 3.68μs addition/subtraction and multiplication for floating-point arithmetic.

Its OS covered batch, real-time, and interactive processing. Other features include built-in hardware DIAC (DIAgnostic Control unit) to diagnose the processing device itself and a switching console to connect/disconnect component devices to the system. Since its announcement, FACOM 230-60 had a high reputation and more than 130 units were shipped.