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        <description>Door networks

A door network lets your callers play games hosted on someone else's computer. ProBoard connects the caller to the game through a plug-in, so you install no door program and need no drop files or DOSBox.

All three plug-ins run inside</description>
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        <description>DOS doors (PBLegacy)

16-bit DOS door games cannot run on 64-bit Windows by themselves. PBLegacy bridges them: it starts the door inside DOSBox-X, writes the drop files the door expects, and passes the caller's connection through.

You need DOSBox-X installed on the board's computer. Each DOS door gets a block in</description>
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        <description>Native Windows doors

A native door is a 32-bit or 64-bit Windows program that ProBoard starts directly. It receives the caller's connection through a DOOR32.SYS drop file (communication type 2: an already open socket handle). It needs no FOSSIL, no COM port and no DOSBox.</description>
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        <description>Doors

A door is a program a caller runs from a menu: a game, a utility, or a link to another service. ProBoard v4 runs four kinds.
 Kind  What it is  Page  Native doors  32-bit and 64-bit Windows programs. ProBoard starts them directly and hands them the caller's connection.</description>
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