Tutorial: Computer System Advantages of Magnetic Bubble Memories

Magnetic bubbles, which offer improved access time over most conventional fixed-head disks, are now serious contenders for memory applications in computer systems. Current literature abounds in descriptions of various technological advances that have led to experimental memory systems.1,2,3Bubble memory chips containing up to 20,510 bits per chip have been exercised through transfer-read-transfer-circulate cycles in good loops at 100 KHz data rate.1An overview of current technology capabilities and a look into the future have been presented by H. Chang.4