JK microsystems Flashlite 186, Руководство пользователя

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JK
microsystems
Flashlite 186
User’s Manual
2
Operation
The Flashlite is configured with two ‘disk drives’ A: and B:. Drive A: contains DOS, the BIOS,
and utility programs essential to the operation of the Flashlite. Drive A: is read-only. Drive B: is
read/write and contains optional utility programs and is available for user files and applications.
The serial console port for the Flashlite has been implemented using bit I/O to keep the processor
serial ports free for user applications. The port is configured for 9600 baud, 8 data bits, 1 stop bit
and no parity. This is the primary mode of communicating with the Flashlite. DOS and the BIOS
treat this port as the logical devices STDIN and STDOUT, in place of a keyboard and monitor.
The console serial port is intended only for use as a development tool. While it is in use,
it disables interrupts for a significant period of time. This may cause disruptions with the
supplied serial port drivers and other devices and functions requiring interrupt support.
When power is applied to the Flashlite or when it is reset, the board goes through its initialization
procedure and then starts DOS. A simple (read-only)
AUTOEXEC.BAT
file is executed and then the
board is ready to use. The batch file performs several functions before the user is given control.
The DOS search path is set, the DOS prompt is set, the CTRL-C flag (discussed later in this
manual) is checked and finally, an attempt is made to execute a file named STARTUP on the B:
drive. This provides a convenient way for custom applications to execute immediately after
initialization of the Flashlite. If you wish to have your application start automatically, create a
batch file named
STARTUP.BAT
that invokes the program. Renaming your application
STARTUP.EXE
or
STARTUP.COM
is not recommended. If this is done and the program locks up,
typing CNTL-C at bootup may not break the program and exit to the DOS prompt.
Although the flash memory devices used have a guaranteed lifetime of over 10,000 write
cycles, it is possible for an application to quickly wear them out. The flash memory is
intended to store programs, and setup data which is normally not changed. Avoid storing
data or frequently changed information on the flash disk.
Operation
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