| 1. | VDU 17 sets the text colour and 18 the graphics colour.
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| 2. | 7501 comprised a smaller enclosure integrated beneath a 7561 VDU terminal.
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| 3. | There are two processes of distillation : CDU process and VDU process.
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| 4. | VDU 2 and 3 toggle whether screen output is echoed to the printer.
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| 5. | VDUs ( " electronic eavesdropping " ) is outside the scope of this offence.
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| 6. | VDU 31 locates the text cursor to the location held in the following two bytes.
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| 7. | Some statements were direct equivalents to VDU codes, such as CLS for VDU 12.
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| 8. | Some statements were direct equivalents to VDU codes, such as CLS for VDU 12.
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| 9. | 7561 VDUs were memory-mapped display monitors, and not character-based terminals.
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| 10. | Modern signal boxes nowadays tend to be provided with VDU based, or similar, control systems.
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