Line Driver Installation; Typical Memory Configuration - Intel iSBC 86/14 Hardware Reference Manual

PREPARATION FOR USE
2Kx8 EPROM
8Kx8 EPROM 4Kx8 EPROM
Socket Jumpers Socket
Jumpers Socket Jumpers
E108-E109
E96-E97 E112-E113
U40 2716
2k E111-E112
U40 2764 8k E112-E113
U40 2732 4k E10B-E109
E96-E102
U58 2716
2k
U58 2764 Bk E96-E102
U58 2732 4k
U39 2716
2k
U39 2764 Bk
U39 2732 4k
U57 2716
2k
U57 2764 Bk
U57 2732 4k
8Kx8 MIX
4Kx8 MIX
Socket
Jumpers Socket Jumpers
E96-E97 E112-E113
U40 2764 Bk E112-E113 U40 2732 4k E108-E109
E101-E107
E101-E107
U58 2764 Bk E96-E102
U58 2732
4k E112-E113
U39 8Kx8 Bk U39 4Kx8 4k
U57 8Kx8 8k U57 4Kx8 4k
Figure 2-3. Typical Memory Configuration
2-10. Line Driver Installation
As shipped, the iSBC 86/14/30 board contains RS232C interface driver and
receiver devices for the J2 connector interface and an 8287 Octal Bus
Transceiver for interfacing Port A to the J1 connector.
The J1 connector interface includes four 8-pin chip sockets (U18, U19,
U20, and U21) for installation of user provided line drivers and
terminators in configuring the I/O port signals for Port B and Port C of
the 8255A PPI device. Table 2-1 lists some of the common types of line
drivers and terminators that may be installed into chip sockets U18, U19,
U20, and U21 for the parallel I/O interface. The iSBC 86/14/30 board
includes an 8287 Octal Bus Transceiver device (U17) that interfaces the
Port A I/O signals for the 8255A PPI.
Factory installed line driver devices at chip locations U23 and U24 on
the board configure the serial I/O interface at the J2 connector for
operation as an RS232C interface.
2-10