Diskonchip 2000; Serial And Parallel Ports; Keyboard Interface; Hard And Floppy Drives - Xycom AHIP6+ Manual

DiskOnChip 2000

The DiskOnChip 2000 is a single-chip Flash disk in a standard 32-pin DIP format.
It requires an 8 Kbyte window to view as an extension BIOS. During boot up, the
DiskOnChip loads its software in the PC's memory and installs itself as an addi-
tional drive.

Serial and Parallel Ports

PC/AT peripherals include two high-speed, RS-232C, 16550-compatible serial ports
and one bi-directional Centronics-compatible parallel port:
·
COM 1 of the serial ports accepts either RS-232 or RS-485 connections.
·
COM 2 is RS-232 (stacked DB 25) with parallel port.
The COM2 port can be used for one of three options:
·
Serial port out the 25 pin DB connector
·
Touchscreen controller interface
·
Infrared (IrDA) interface
The BIOS setup is used to configure the port as a serial port or IrDA port. This port
can be used as both a serial interface and an IR interface, by allowing software to
control the connection.
If the touchscreen controller is jumpered to use COM2, the 25-pin DB connector
must not be used to interface to a device. These lines are combined internally. The
BIOS setup menu for COM2 must be set to standard operation to use the touchscreen
controller on COM2.

Keyboard Interface

The keyboard interface uses a standard PS/2-style connector. A polyswitch protects
the +5 V. This device opens if the +5 V is shorted to GND. Once you remove the
shorting condition, the polyswitch allows current flow to resume.

Hard and Floppy Drives

The floppy interface supports one floppy drive. The AHIP6+ can interface to a floppy
via the on-board floppy connector or the external floppy connector.
In order to connect a floppy drive to the external connector after power up, the floppy
drive must be setup for a 1.44 MB drive and the floppy drive test must be disabled. If
this is not done the system generates a floppy drive error during the POST (Power On
Self Test).
The enhanced IDE (EIDE) interface supports up to 2 hard drives. Hard drive inter-
face is via the Xycom plug-in backplane or the on-board IDE controller.
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