Mesa 4I33, Руководство пользователя

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4I33 1
GENERAL
DESCRIPTION
The 4I33 is a low cost NE2000 compatible Ethernet card for the PC/104 bus
that includes an RS-232/RS-485 serial port and 24 parallel I/O bits.
The 4I33 Ethernet is NE2000 compatible and uses the RTL8019AS chipset. It
supports both EEPROM configuration and Plug-and-Play modes of operation.
10BaseT, 10Base2 (BNC), and AUI interfaces are provided.
The 4I33 also supports external panel mount 10BaseT or BNC connectors. The
panel mount BNC tranceiver (MAU) connects to the 4I33's AUI connector. The panel
mount 10BaseT connector has link and activity LEDS.
The serial port is a standard COMX compatible port using a 16550 compatible
FIFOed UART. The serial port is available with either RS-232 or RS-485 level shifters.
The serial port has 4 selectable I/O locations and can use IRQ 2, 3, 4, 5, 7, 9, 10, 11,
12, or 15.
The parallel port uses a 82C55 and provides 24 general purpose I/O bits. All
I/O bits are provided with pullup resistors to simplify connection to switches, sensors,
etc. The parallel port has 4 selectable I/O port locations.