SPECIFICATION for ENIGMA DISC IMAGER
16K rom designed to provide the disc user with total control of the single
density disk system used by Acorn and is the most sophisticated of it's kind
available. It provides facilities for the backing up, editing, and production of
protected disks as well as all the other usefull utilities that one may expect
for standard disks. ENIGMA also allows for the prefixing of it's commands with a
capital "A" so eliminating the problems associated with other rom clashes.
(Alternativly *ROMID can be used to switch other roms 'off').
All the disc utilities are compatible with the current Acorn disc filing
systems (DFS 0.9X and 1.X). Other DFS makes cannot be guaranteed, although the
Watford DFS and the latest "B" series Amcom DFS have been tested and appear to
calls made to OSBYTE. The contents of A,X, and Y registers are displayed on
entry as well as exit and an option exists to output the display to printer or
screen or both.
Clears the BBC's
memory from &400 to &8000
backup routine. Backs up disks with non standard formats. Copies disks with
deleted data formats, non standard sector sizes, and tracks with multiple sector
copying of files from one drive to another, A menu of the files is displayed and
after selection the files are copied in the order in which they are
sectors to be read from disc, displayed and edited in hex or Ascii, then written
back. This utility is used on standard Acorn format disks, (Otherwise see
Searches the disc
for any occurence of the specified string. On finding a match the disk sector
editor is entered and normal disc editing may then be done, or the search
memory to screen or printer. All calls to the OS are labelled, and facilities
are provided for relative disassembling, which allows code to be disassembled
from a position it does not normally run from. Selection of a sideways rom for
disassembly is also possible.
dumping of files from disk to tape. A menu of the files is displayed and after
selection the files are copied in the order in which they are
Formats a disk so
that it can be used in 40 and 80 track drives.
files to be recovered or alternate names for the same file to be
standard disc with the options of formating a dual sided disk in one pass or a
disc with a large catalogue, (60 files).
amount of free space remaining on a disk as well as reporting the size of any
gaps and their position on the disk.
Produces a dump
of a disk's track and sector ID's and intelligently calculates the number of
sectors on a track as well as the different sector sizes on each
Allows the screen
editing of the sector ID information of a track.
editing of the BBC in both Hex or Ascii.
movement of a Basic program from one page to another, or a block of memory from
one area of memory to another.
priority of OSBYTE, and so enables the user to overide any call made to
Allows the global
or selective renaming of disk directories.
Read or write
specified sectors to/from memory.
Repairs a damaged
track on a disc. Recovers as much information as is possible before reformatting
the track and writting the data back out.
on all current roms in a machine with options for either saving images to disc,
or scans a disc for any rom images and loads them into sideways ram. A further
option allows the disabling and enabling of roms in the event of
A special sector
editor which allows individual sectors to be read from disc, displayed and
edited in hex and Ascii, then written back. This editor provides for disks with
non standard formats and intelligently edits deleted data formats, and non
standard sector sizes.
Allows non Acorn
standard tracks to be formatted.
Similar to *MOVE,
but with a different syntax for compatibility with other systems.
standard tracks with non standard sector sizes or deleted data into
on a dual catalogue (60 file) disk.
Automatic tape to
disc transfer. Often used to load files dumped with *DTAPE.
Locks a cassette
based program. The program can then only be *RUN
Copies the text
in the current text window to a printer (any make).
based programs. This is very usefull if used in association with
whole or any number of tracks on a disk. Any faults are reported with track no.,
sector no., and error.
calls made to OSWORD. The contents of A,X, and Y registers an displayed on entry
as well as exit and an option exists to output the display to printer or screen
As disk protection is constantly changing, we intend to make upgrades of
EDI available as and when the need arises at minimum cost.
Altra roms reserves the right to alter the Enigma Disc Imager's
specification without giving prior notice.
Retail Price .....£39.99
Enigma Disc Imager is available from all good computer dealers or by
Send order to:
Altra Rams, Name :
209 North Street, Address :
Leeds, LS7 2AA,
Please send me E.D.I.'s. I enclose the sum of
or for telephone orders, please ring 0532 451508.