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Table of Contents




Flash Card

Connecting To the Wildcard Bus

Selecting the Wildcard Address

Installing the CF Card

CF Card Software Package User Guide and Glossary

How To Install the CF Software

Using the Driver Code with C

Using the Driver Code with Forth

CF Card Software

Categorized List of Functions and Constants

ATA Failure Codes

ATA Primitives

CF Card Information


File Access and Position Modes

File I/O

File Processing

File System Error Handling


Overview of Glossary Notation

Using the File System Functions

Commonly Used Terms

String Parameters and the Use of THIS_PAGE

Access Privileges

Root Directory Only and File Name Restrictions

File Position Indicator

Error Handling

Real-Time Clock on the Host Computer Enables Time/Date Marking of Files 12


Automatic Initialization and File Processing

Upgrade note for former Memory Interface Board (MIB) Users

How To Create and Use an AUTOEXEC.QED File

Compile a Program into Flash Memory

Create a Set of Image Files

Transfer the Image File Contents into Memory

Restrictions on Software Upgrades

Recovering from Buggy AUTOSTART.QED Files

Compact Flash Card Software Package Main Glossary

Upgrade Notice for Prior Users of the Memory Interface Board

Sample FILEDEMO.C File (pdf)

Sample FILEDEMO.4th File (pdf)

CF Wildcard Hardware Schematic

The Compact-Flash Wildcard and
CF Card Software Package User Guide

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CF Card Software

The CF Software Package comprises four layers. The first two are essentially invisible to the end user, and the latter two provide high level capabilities:

  • The ATA/IDE software driver layer enables drive identification and read/write operations using standard ATA commands.

  • The FAT layer implements a DOS-compatible FAT (File Allocation Table) file interface to track the placement of files on a pre-formatted ATA flash card in a PC-compatible format. Both FAT-12 and the newer FAT-16 formats are supported, and the FAT format is supported by all Microsoft operating systems including Windows NT, Windows 2000 and Windows XP. The key restrictions are that files must be in the root directory, and filenames are limited to the "8+3" scheme: up to 8 characters in the filename, and up to 3 characters in the file extension.

  • The file management layer includes a set of user-callable commands modeled on the ANSI C file manipulation functions that enable the programmer to create, open, close, read, write, rename, copy and delete files in the root directory. Other software features include directory listing commands that behave like the DOS DIR command, a File_Type command that prints the contents of a specified file to the active serial port, and a File_Capture function to capture text sent from a terminal into a specified file. This set of functions allows files to be managed from within the QED environment and/or the PC environment. Files can be created on one platform and read and modified on the other.

  • The automated file processing and redirection layer enables the programmer to specify a file to be automatically processed by the QED-Forth interpreter/compiler at startup. The software searches the root directory of a detected CF card for a file named "AUTOEXEC.QED" and, if it is found, interprets and executes the commands in the file. Two easy-to-use functions named Page_To_File and File_To_Page can be invoked in the autoexec file to store memory contents in a file, or transfer file contents to memory. This enables software upgrades to be performed in the field by simply plugging in a CF card that contains the proper update files. Finally, a powerful Redirect function allows any function to take its input from a specified file, and/or send its output to a specified file.

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