Program is intended for diverse data transfer and storage operations with medias
(drive, disk). Main option is making of image
file, and reverse operation - copiing from image to media. Such image
files are useful as backups, as images suitable for diverse emulators.
Program works with hard drive category of medias - there belong: IDE
hard disks, PEN drives, diverse FLASH storage cards as Compact Flash -
they attach usually via some USB card reader to PC. File transfer may happen
directly from/to attached disk/media, or from/to image file.
Selection of drive is by
on it's line in list window left.
Then program attempts to detect used filesystem on that media - 'DOS
mbr' means usually that it is hard disk in PC - so better don't write
to it! PLUSIDEDOS is used by Spectrum +3e and some other clones.
'Charea DoS' is mine system, with 36 areas by begin letter A-Z, 0-9. Refresh button is for
forcing detection of all drives again - in case you
connected/disconnected something. Under it you may set offset
from start of disks and count of sectors if want to read/write only
segment of drive.
Because it is not possible to detect correct CHS parameters via USB
reader, there is possibility to enter them manually. Program usually
offers usable values for Compact Flash cards. With click on 'Size CHS' user may change
detected drive's size, by need (after entering CHS manually). That
size remains until next drive selection. 'LBA' is required only for
disk Init, see below.
With click on 'Open image file'
you may select image file instead drive. You may then perform even
conversion RAW(IMG)-HDF or HDF-RAW(IMG). Just click after selecting
image file on
'Read from drive', and
program will convert.
If 'Swap L/H' is checked program will swap Low/High bytes by
reading from drive to image file or by writing from image file to
drive. It is for Atari ST disks used with IDE interface, where MSB/LSB
order is reversed in compare to PC. When such drive is selected 'GemDos
SW' will appear as filesystem in 'Info' block. Converting image file to
reversed L/H ordered is easy: open image file, check 'Swap L/H' and click 'Read from drive' . Give filename and save it...
Program gets CHS parameters from hdf files, but
RAW or IMG ones it is not possible (except when Charea DoS FS is on,
see below -
Guess geo.) , so enter them manually by need - in case
of (older) image files for usage with CHS ROMs.
- Limitations: works
only in newer Linux versions. KDE required. Tested with Kernel
2.6x. Must be root (su)
to read/write on drives. In user mode extraction/adding from/to images
- Speed: it should work pretty
with USB 2.0 card readers. Speed
depends much from used media. Newer CF cards can read over 2 MB/sec.
Write is usually slower 2-3 times than read. New PEN drives are
even faster - read over 5MB/sec.
Atari ST GemDos disk file transfer and partition extraction
When GemDos(or Dos FAT16, BigDos)
type partition system
is detected, following dialog will open after clicking on 'File transfer' :
It works with GemDos AHDI 3.0 spec
partitioned hard disks, medias or image files of them (img, raw) . Plus
works with Dos FAT16 and BigDos partitions.
Select partition in right box, and program will list root directory of
it in left box.
May select multiple files, directories at once. With 'Extract' all it
(with subdirectories and their content) will be copied in current
directory on PC, which may be selected with 'Dest Dir' button.
Buttons 'Dir Up' and 'Open Dir' are for
navigation in GemDos partition's directories.
Subdir can be opened with double-click on it's name too.
'Add files' : It is of
course for copiing files from PC to attached
disk/media or to image file. May add multiple files at once, but not
subdirectories with their content.
Below is selectable whether timestamp of added files will be current
time or origin file's time.
'New folder.' :
creates subDir by name given in editbox below - in current ST dir. Use
is for extracting image file of only selected partition. From drive or
In case of swapped L/H it will be saved in normal order, so may access
partition with common tools.
Such image file (of only a partition) may be mounted with
command: mount imagefile -o loop /somedir . If
you click on button 'Partitions:' and just
cancel save it will select segment for just that partition in main
window - fields 'Sectors from start' and 'Sector count' . Then 'Write
to Drive' will write in that segment of selected drive or selected
image file. It allows some manipulations as copying one partition to
other, inserting partition with new content and similar. But it is for
experts only, if you don't know what are doing better use not - may
corrupt drive/image file.
It works now with AHDI (GemDos) spec. disks (or image files) with reversed (swapped) (IDE interface) byte order too. Program will autodetect
byte order ('GemDos SW' will appear for reversed ones), and will do all
User may extract ZX
files from drives or image files (raw or hdf
format). After selecting drive from list or file with 'Open image file' click on
'File transfer' - it
is designed for Charea DoS system, used by hard
disk and CF ROMs (zxcflba.rom, zx8bide.rom & zxide.rom) on this site.
If you get mess instead lists probably CHS is incorrect. For LBA it is
'standard' 32 Sector/track and 8 Heads. Clicking on 'Guess geo.' may detect and
set correct drive geometry.
clicking on 'File transfer' button be sure that Image format is correct
set. Program usually automatically sets it, but sometimes user will
need to manually set it. For 8-bit simple IF drives or images must set
ZX > PC:
- At left select
Charea, then clicking on
files in middle box selects them for transfer - they appear in right
box. With 'Save sel.'
it will be transferred to PC.
- Resulting file may be TAP file
, Z80 snapshot. If
length ( last
at Cat: ) is 49152 it will be Z80. It is possible to save ZX
files directly, without header - just check 'Save bin.', and all will be
saved so, with extensions bin.
You may select max 32 files at
once. However, it is not wise to select lot of files for TAP at once -
all will go in single TAP file. Best way is as it is shown on pic.
above - first select BASIC loader and then CODE (after it). Most of
programs is recorded so. 'Erase sel.' is for erasing
ZX files. It works little unusual - may erasing only last file in
charea. But you may select again multiple files, just select them in
order from last to up - may select from different chareas at once.
- With click on 'Chareas'
program will set segment for just currently selected charea - to make
easy save/write of individual chareas of drives.
PC > ZX:
Click on 'PC > Cha.' button, and
select multiple files with KDE fileselector:
especially 'authors' of TAP files had pretty limited naming
imagination, and to prevent to see too often message like: "NAME
EXISTS" I implemented some autonaming system. In case
duplicate name in TAP file, prog. will rename it to re.xxx.PCfilename .
're' may be changed in editbox 'Rename:'. xxx is auto-counter
in range 1 to 255. If begin character is illegal (not A-z, 0-9)
it will be changed to 9. Codes above 127 and below 32 in filenames will
be changed to '?'- to make edit
- Supported filetypes are: SCR -
ZX screen, exactly 6912 bytes long. SNA
- old snapshot files. Z80
snapshot - V 1.45, V 2.01 & V 3.0 ,
only for 48K, for now. Plus TAP
files and BINary files - bin
will be copied directly as CODE files, with start address 25000, max
len. 48KB. Transfer mode depends on file extension.
After getting such renamed files it is good to correct BASIC loader,
and save datas with some meaningful names: Corrections will be needed
for commands like: LOAD "" -
it is not allowed by disk systems, so enter in brackets filename. Mine
ROM also not accepts LOAD "pic" SCREEN$ - change it to LOAD "pic" CODE
 . Luckily, ZX filesystem is case sensitive, so you may play
with RePTON, rEpToN etc... .
- In some cases transferred snapshot will
not work - it is because of
limited hardware. Stack may be overloaded. In such case help is to make
another snapshot file on PC (looking for another on WEB). Rule is: make
snapshot when game is paused. In case of 'Name already exists' by
snapshots just simple rename PC file...
- Some TAP files have headerless (and
nameless) parts - such blocks will
to files with names: hl.1.PCfilename, hl.2.PCfilename etc. Of course,
here is also possible to change prefix 'hl' to different - editbox 'H'less:'.
User must find way how to make later load of those files normally
- some machine code knowledge is necessary.
- For experts: If I reg points to ROM, it
must be #39 for IM 2 mode,
because ROM is full with code.
main window, at bottom right is button 'Create
empty img' . It will create
empty image file in
format according to settings in box 'Image format', with geometry by
settings in box 'CHS setting'.
Recomended is usage of HDF format
- it holds all necessary parameters. For 8-bit simple IF HDF 256
format is required.
of ZX disk or image file:
usage, disk (media) must be
initialized, what means creating of filesystem. It is something like
partitioning on PC.
Select drive or Open image file. Set geometry by
need (it can't be autodetected in some cases). For zxcflba.rom (CF
interface) click button 'LBA'
- it will set correct parameters for init (32 sec/tr & 8 heads).
Check is Image format
correct (for 8-bit simple IF it must be HDF 256). Then click on 'Init ZX FS' at bottom right.
Program divides space by criteria
letter is common. So, much more space for S than for Q.
In listbox is begin letter, then
total capacity of it's charea and
number of CAT slots - so much files can be stored there. By clicking on
charea in listbox it's parameters will appear in setboxes right. There
may adjust size and slot count. Lower will see total size of all
chareas. Most important is to watch 'Free:' indicator. If it go in
negative, you must decrease size of some charea(s). Otherwise last
charea(s) will be outside of disks capacity.
Small setbox 'Data at:' is for
setting start cylinder of first charea.
It is standardly 1, but in some cases may be bigger, up to 9. Can't be
0 (at start is Master CAT). After writing in value click on 'Data at:' to enter it. And may need to decrease
some sizes after...
Old filesystem has some limitations: max size of charea is 32MB by CF
16-bit IF, and 16MB by 8-bit simple IF.
Count of CAT slots is limited to 4064/2032. Still, there is lot of
space: in 16MB can fit over 330 snapshot. Max size of drive/media what
can be fully used is about 1.1 GB.
New filesystem with big sectors has max charea sizes of 64MB for
of interfaces. Check 'Big Sectors' for such ROMs before Perform
has sense only
for larger drives/medias - over 500MB. Fillable media size is then 2.2
GB (4.4 GB
for 8-bit IF).
With click on button "Perform
INIT", and confirmation, disk/image will
be initalized and ready for usage. You may imediately check it by
entering 'File transfer' .
Download executable (Mandriva
2006-7. P. Putnik
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