Operating System Installation

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Operating System Software Installation

BOAR operating system installation proceeds in two parts:

EPROM programming
Software uploading into EEPROM

EPROM Programming

The BOAR operating system software which is installed into the EPROM comes in one file called exec, which is in a.out format. The corresponding raw data file is called exec.raw. Because BOAR uses two 8-bit EPROM chips, this data is split into two files called exec.even and exec.odd. These files contain the more significant and less significant bytes, respectively. Because of the big-endian architecture, more significant word halves reside in even addresses, but connect to the top halve of the databus.

Preparing the EEPROM

The code in the EPROM chip contains a Flash EEPROM filesystem, a device called ROM:. Initially it contains nothing and must be formatted before you can install software on it. Use the format command in the shell to format the rom-disk.

A number of programs are included in the EPROM:

shell-seg

A text-based user interface, a shell
aux-handler

A handler that performs the communication through the serial port
nil

A great void that eats everything thrown at it (NIL:)
ram

A handler for ramdisk (RAM:)
rom

A handler for romdisk (ROM:)
sx

Send X/Y-modem(-batch) program for file transfer
rx

Receive X/Y-modem(-batch) program for file transfer

Uploading the Software

A number of programs should be uploaded to the ROM-disk.

rom:xil/xilscript.b68k

Emulation script interpreter.
rom:xil/clockx_001.bit

Default data feeder configuration for clock Xilinx
rom:xil/xilbitcat.b68k

Concatenates .bit-files into one
rom:c/tetris

The first and best BOAR application program.
rom:c/dates

Clock setting and getting program.
rom:s/shell-startup

A startup-script used by the shell each time it is started.

An example rom:s/shell-startup: set TIMEZONE +0300 set term vt100 alias cp copy alias mv rename alias df info alias dir "ls -lg" alias l ls alias cat type alias more type assign c: rom:c assign s: rom:s c:dates set0 ram nil path rom:xil rom:fortune rom:c rehash cd ram: