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MANUAL3
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1987-08-26
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NOTE: ZZAP REQUIRES ANSI.SYS BE INCLUDED AS A DEVICE IN YOUR CONFIG.SYS
FILE! CONSULT YOUR MS-DOS MANUAL IF THIS IS NOT ALREADY DONE!
This file describes the operation of ZZAP3.EXE - version 3 of ZZAP.
Version 3.0 was the marked the conversion of ZZAP from the Zenith series 100
systems to the IBM-PC. The ZZAP3.EXE program is fully functional and not a
demo. All references to ZZAP in the following refer to version 3.
GENERAL DESCRIPTION
ZZAP is a disk editor (absolute/file). Any sector on the disk is available for
ZZAP to read, modify (within the buffer) and write, as well as any file by
filename upon the disk. A 4096 byte buffer is used to hold the information
read from the disk and/or create/modify data to be written to the disk.
Editing is done on a byte-by-byte basis entering the data in any of four input
types specified (HEX, DECIMAL, OCTAL or ASCII). A window is provided on the
left half of the home screen to view portions of the buffer while displayed in
all four input types. Provisions are made to "page" through the buffer by
displaying 256 bytes at a time in the given input type. While the page option
is used, the printer may be activated to make a hard copy of a given page.
STARTING ZZAP
ZZAP is executed from the drive prompt of MS-DOS. After ZZAP is loaded the
screen will clear and the home screen will appear. On the left half of the
screen toward the top are the four data representation titles followed by the
word "byte". This is the "window" to the buffer. On the right half of the
screen is the list of ZZAP commands under "Command Menu". To the bottom right
half is displayed the current input type and the version of ZZAP. Most all
prompts will be displayed on the very bottom of the screen.
ASCII REPRESENTATIONS
Most programs that convert a byte to the ASCII code only do a partial
conversion (just the printable charactors). ZZAP will decode all 128 ASCII
codes. The representations are:
ALL PRINTABLE CHARACTORS (EXCEPT THE SPACE) ARE PRINTED AS IS
ALL CONTROL CHARACTORS ARE PREFIXED BY A CARET (I.E., CONTROL-E IS ^E)
THE DEL CHARACTOR IS del
THE ESCAPE CHARACTOR IS esc
THE SPACE KEY IS ' '
ANY VALUE BEYOND 128 IS ...
THE COMMAND MENU
Any command that has the first letter enclosed in angle brackets require that
command to be entered in uppercase!
<A>dvance - Used to move the top of the buffer to a given byte. The range of
this value is 0 - 4095.
<B>uffer - Allows you to move data about within the buffer. You will be given
the option of <C>opy, <E>xchange, <F>ill. Each of these commands
are self prompting for the information required. Note that the <F>
option will fill the specified range with the value that is the
current input type. Be sure the current input type is set to what
you want before selecting the fill option.
<E>dit - Allows you to edit the buffer. The values that are input will be of
the current input type. You will be prompted for the byte to edit.
That byte will be moved to the top of the display and the edit bar
will appear. When you are done, just enter an upper or lower case
N (or n) when the programs prompts: "Change this byte?".
<F>ile access - Will toggle the file access switch off and on. The state of
this switch is displayed near the bottom of the "Command Menu"
list. When it says OFF, access to the disk will be by sector.
When it says ON, access to the disk will be by file.
<I>nput type - Select the uppercase letter for the current input type.
<P>age - You can select from 1 to 16 pages to be displayed before returning to
the home screen. Each page will display 256 bytes. After selecting
the number of pages, you will see some other options on the bottom
line of the "page" screen that you may select.
<R>ead - Will read from the disk. If the file access switch is OFF, you will
be prompted for a drive and sector number else a request for the
name of the file will be made. All transfers into the buffer begin
at byte 0 of the buffer. If you change your mind at the last minute,
depress the "ESC" key.
<S>can - This command has no other prompts - it will perform a slow, readable
scan of the buffer across the "window". Depress any key to stop.
<W>rite - Will write from the buffer to the disk. If the file access switch is
OFF, you will be prompted for the drive and sector else a request for
the file name will be made. BE SURE OF WHAT AND WHERE YOU ARE
WRITING!!! Before the write is done, you will be prompted to enter
an uppercase W. Any other key will abort the write operation.
<Z>zap exit - Terminates the ZZAP session.