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HMG Digital Technologies Corporation: Difference between revisions
→How to Tell
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* Some SP mode tapes duplicated by this company from 1990-1994 generally had two, three, four, five, six or seven vertical rectangles in the vertical blanking interval at the beginning of the tape.
* Some EP/SLP mode tapes, on the other hand, had a capital '''H''' in the vertical blanking interval at the beginning of the tape.
* Some Goldstar Video
* Some tapes may have a silent white screen test pattern at some point at the end of the tape.
* A few tapes had the number 9 in the vertical blanking interval at the beginning, sometimes with the vertical rectangles.
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