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X381: Difference between revisions
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→Rotary Optical Encoder
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Viewed from a modern perspective, the encoder disk is two ROMs driven by the same address lines, | Viewed from a modern perspective, the encoder disk is two ROMs driven by the same address lines, | ||
with the two light bulbs serving as chip select lines. | with the two light bulbs serving as chip select lines. | ||
However, the wiring on the SEC/Hz switch suggests that there's more complexity than just | |||
selecting between two light bulbs. | |||
The SEC/Hz switch is second from the bottom, with blue plastic wafers. | |||
[[File:Tek x381 lower front left.jpg|300px]] | |||
==Motorized TIME/DIV== | ==Motorized TIME/DIV== | ||