Read only memory storage system

Systems are equipped with read-only memory (ROM) lor the operating system and random-access memory (RAM) for storage of user-specific... 

CAMSEQ/M was developed around a Tektronix 4051 Microcomputer Graphics System. The hardware required includes the basic 4051 microcomputer with a minimum of 16k bytes of memory (32k is recommended), a "joystick" graphical input device, and a matrix function package (in a read-only memory firmware pack). A vastly more versatile system requires the addition of a file manager/ disk system. In order to communicate with the NIH-EPA-CIS or another "host" computer, a communications interface is necessary. The total hardware cost is approximately 17,000. Table II outlines the required hardware. The 4051 utilizes a direct view storage display which does not employ a selective erase feature. Therefore, it is necessary to replot the screen frequently in order to remove unwanted information. This handicap is the price one must pay for low cost, but quite sophisticated computer graphics features, and does not pose any major problems in CAMSEQ/M. 

The amplifier (5) boosts the signal, eliminates temperature coefficients, and adjusts the offset. The low pass filter (6) limits the bandwidth. The drive circuit is a closed loop system to achieve a stable drive oscillation. It consists of a structure (not drawn) that detects the oscillation movement of the drive of the yaw-rate sensor element, a control unit (2), and an actuator (not drawn). The start circuit (9) initiates the drive oscillation at power on. The block (8) generates all necessary adjustment signals and includes the logic circuit for the trim and an EPROM (erasable programmable read-only memory) for the storage of the trim data. 

Storage on modern systems, if drives for removable disks, writable CDs (compact disks), CD-ROMs (compact disk, read-only memory), DVDs (digital video disk), and magnetic tapes are allowed or there are network connections to servers with large-capacity storage devices where data can be stored, is virtually infinite. 

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