BUFFER EDITOR

BUFFER EDITOR

The buffer editor is one of the most unique and powerful features of the EPROM+ system. Allowing full access to the system's buffer, the editor provides you with a full screen display of the contents in both hex and ASCII formats. You may also perform work directly on the device while the editor is active. This means you do not have to leave the editor to perform operations such as reading or programming. The buffer is maintained in system memory, not on disk. The buffer size will be a minimum of 256K to a maximum of 16 megabytes depending on available memory in your computer. The editor has a comprehensive set of commands providing a feature rich tool kit of bit and byte oriented functions.

The editor offers two modes of operation. The default editor mode (left) is "BYTE". In this mode each buffer address location is displayed in the standard two hex character per byte format with the row address in the far left column. In the byte mode all editor address values are byte oriented. "WORD" mode (right) organizes the data into groups of four hex characters per address location. In word mode each buffer address contains two bytes organized as hi and low. With word mode you have the ability to operate on word values and also work with data which is displayed in word format. This makes working with PIC processors or 16 bit data values extremely easy.

BYTE MODE	WORD MODE

DATA COMMANDS

Modify buffer - This command allows you to modify any location(s) within the buffer. Buffer position is identified by a reverse video cursor positioned by page up, page down, home, end and arrow keys. Data may be entered in hex, binary, octal, decimal or ASCII. ASCII may be entered at any time by pressing tab. Other number bases are selected with the "set number base" command.

Transfer data - Transfers (block move) data from any location to any other location within the buffer.

Clear buffer - Initializes buffer contents to 00 or FF hex.

Display buffer range or page - Positions the editor window to any place within the buffer or scrolls through a specified range of addresses.

Fill buffer with a constant - Fills a specified address range with a constant value. The value can be either byte or word depending on the buffer mode.

Checksum - Allows you to calculate a checksum over any buffer address range.

Logical operations - Performs AND, OR and XOR operation of buffer data with a constant over a specified address range. Supports both byte and word values. Also performs INVERT.

Byte/Word data manipulation - Allows you to select from one of four options. (1) Byte swap - Performs a swap of hi and low (odd/even) bytes in the buffer. (2) Nibble swap - Swaps the hi and low nibbles of each byte. (3) Extract Even Words - Extracts words at even word addresses only. (4) Extract Odd Words - Extracts words at odd word addresses only.

DEVICE COMMANDS

Single byte program - Programs one or more single bytes into the device installed in the programming unit.

Inspect - Allows you to inspect (read and display) the contents of a device installed in the programming unit without placing the data in the buffer. This command also has an option to inspect, compare and show differences between the device contents and buffer data.

Quick view device contents - Allows you to view the device contents on the editor screen without reading the data into the buffer. This is a quick way to determine if a part is correctly connected to the system.

Read device into buffer - Allows you to read the contents of a device into the buffer at any address or adderss 0.

Program device from buffer - Allows you to program a device from buffer data over a specified address range or address 0.

Compare device with buffer - Compares and shows differences between the device contents and the buffer data. Also used for confirming data in the buffer matches the data in the part.

Write data to device - Writes data from any range of addresses in the buffer to any locations in the device. The write command differs from the program command in that the program command always starts at physical address 0 in the device.

Zone read - Allows data from any range of device addresses to be read into the buffer at a user specified address.

UTILITY COMMANDS

Search buffer for hex or ASCII pattern - Searches the buffer for a specific hex or ASCII pattern. If the pattern is located the search halts with the match addresses displayed. You are given the option to modify, exit or continue to search for another occurance.

Set editor mode to byte or word - Sets the editor display and entry formats to byte or word values.

Set display / entry number base - Allows you to set the number base used in the editor. You may set the editor to accept and display data in hex, decimal, octal, binary and ASCII.

Hex arithmetic - Allows you to add, subtract, multiply and divide hex integer values.

Bipolar prom format convert - Changes the buffer from byte values to fuse (bit) values and back. This command is used with bipolar proms to work with individual fuse elements in the memory array.

Get Confirmed Data - Invokes an automated procedure by pressing a single key (G) which results in valid (confirmed by read/compare) data in the system buffer. This command is primarily used with in-circuit reading of serial eeproms.

Help screen - The editor has an on-line command summary which can be displayed at any time. The command summary describes each command and how it is used.