AT&T PC 6300 - Bus Converter

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SYSTEM OVERVIEW
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Bus Converter
The Bus Converter Boards (Figure 2-11) provides 16-bit and 8-bit
expansion slots. This permits simultaneous use of 16-bit expansion
boards and 8-bit IBM compatible expansion boards.
The Bus Converter Boards have two sets of connectors:
• Two or three 38-pin connectors to handle signals used by the
16-bit expansion boards.
• Seven 62-pin connectors to handle signals used by both
16-bit boards and 8-bit IBM compatible boards.
Figure 2-11 shows that the connectors are arranged in seven rows.
Two or three of the rows have both a 38-pin and a 62-pin connector
in the row. These rows are used to connect the 16-bit expansion
boards to the system and are referred to as dual-connector
expansion slots. One dual-connector expansion slot is reserved for
a Video Enhancement Board (DEB [Display Enhancement
Board]). The other is used for the insertion of a Memory
Expansion Board that is discussed later in this chapter.
Figure 2-11 also shows that there are five remaining rows with one
62-pin connector. These five expansion slots are used to install
8-bit IBM compatible boards. They are referred to as
single-connector expansion slots. This manual now discusses only
one 8-bit board: the HDU Controller board.
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