Abstract: The present invention relates to halogen-free flameproof thermopolastic molding compounds which comprise an aromatic polycarbonate, a styrene-containing copolymer, a styrene-containing graft polymer, a phosphorus compound, a silicon compound, and a tetrafluoroethylene polymer. It has been found that the use of a specific type of silicon compound leads to a polymer mixture having improved stress crack resistance and impact properties. The silicon compound is represented as the following Formula (I). in which n and m have a value of from 5 to 8, and x and y have a value of from 1 to 5.

Abstract: A device and method for adjusting the reproduction speed of a CD-ROM drive according to variations of a supply voltage. The supply voltage is compared with a predetermined reference voltage. If the supply voltage is lower than the reference voltage, the rotating speed of the spindle motor is lowered to a corresponding speed. Therefore, the error correcting capability of the DSP is maintained and the reliability of a product increases.

Abstract: A method of driving a CD-ROM drive is provided which includes the steps of setting an initial driving speed of a disk to a predetermined N.times. speed, and measuring a length of time t required for generating a correction error signal (CES) of a digital signal processor (DSP) while playing the disk at the predetermined N.times. speed. If it is determined that the measured CES generation time t is smaller than a first reference time t.sub.1, then the disk is played at N.times. speed. If it is determined that the CES generation time t is equal to or greater than the first reference time t.sub.1, and smaller than a second reference time t.sub.2, the disk is played at (N-2).times.speed. If it is determined that the CES generation time t is equal to or greater than an (n-1)th reference time t.sub.n-1 and smaller than an nth reference time t.sub.n after the algorithm is sequentially repeated for all reference times between t.sub.1 and t.sub.n, the disk is played at 2.times. speed.

Abstract: A method for divisionally utilizing a memory area may include the steps of setting an input buffer area in the memory, receiving data from a computer, determining whether a user defined character is received, storing data to the input buffer if the user defined character is not received in the above step, determining if a down load flag is set to "0" if the user defined character is received, resetting the memory for the input buffer and down load buffer if the down load flag is set to "0" in the above step, setting the down load flag to "0", and storing data in the down load buffer if the down load flag is not "0".