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-
-
- DFC5 --- A disk formatter/copier
-
-
- Written by Tom Rokicki & Sebastiano Vigna
-
-
- DFC5 is a new, exciting, general-purpose disk copier and formatter
- which we hope will meet the needs of a large number of Amiga users.
- This program is essentially a development of Tom Rokicki's previous
- DFC4 program: the principle adopted has been to eliminate everything
- that wasn't absolutely necessary, to reduce the size of the program as
- much as possible, to squeeze every ounce of speed from the standard
- trackdisk.device through an utterly async design, and to incorporate a
- number of useful thrills such as voice, multiple passes copies and
- checksum for the RAM buffer.
-
-
- Main features:
-
- - DFC5 copies from/to any combination of Amiga drives.
-
- - DFC5 has a switchable 880K RAM buffer that allows for any number of
- duplicates while only reading the source disk once. The combination
- of destination drives can be changed at each pass.
-
- - DFC5 checksums the RAM buffer. If some badly written program is
- trashing your memory, you are alerted. Thus, buffered copies are as
- safe as direct copies.
-
- - DFC5 is smaller than 11.5K, and even on a 1 megabyte Amiga you should
- be able to do single-pass multiple copies.
-
- - DFC5 will automatically switch to multiple (2, 3, or 4) pass copies
- if there isn't enough memory for a full 880K buffer. This even allows
- for making multiple copies with multiple passes on any Amiga.
-
- - DFC5 starts from track 79---no more last-moment verify errors!
-
- - DFC5 lets you retry/skip any read, write or verify errors.
-
- - DFC5 is highly system-friendly. Only drives actually used are
- inhibited, and the use of CPU time is negligible.
-
- - DFC5 is totally asynchronous, both in handling the disk and in the
- user interface; you can, for instance, turn verify on/off at any time,
- even while copying.
-
- - DFC5 has the option of incrementing the creation date of the copy
- so AmigaDOS doesn't get confused. If, however, the option is switched
- on and the disk in not an AmigaDOS disk, the user is alerted.
-
- - DFC5 can be activated many times, and each copy can do a different
- task; for instance you can copy from DF0: to DF1:, while formatting
- DF2: and doing a multiple pass copy on DF3:!
-
- - DFC5 is faster than diskcopy---actually it pushes the use of the
- standard trackdisk.device to its limits (125 secs for a disk-to-disk
- copy).
-
- - DFC5 alerts the user with sound (and optionally voice) about the
- operations in progress---so you can really be doing something else!
-
- - DFC5 can format both OFS and FFS disks.
-
-
- To use DFC5, you have simply to click on its icon. You will see four
- rows of gadgets. The first one has at most one gadget selected: it's
- the source. The second one lets you select the destination drive(s).
- The third one contains the option gadgets. The fourth one contains
- the action gadgets. Notice that the Auto gadget is currently
- disabled; because of a bug in the 1.3 trackdisk.device, its
- implementation has been delayed to a 2.0-only version of the program.
-
- Every gadget can be activated via mouse or via keyboard. The first row
- can be activated with 0,1,2,3, and the second one with 4,5,6,7. For the
- other gadgets, you can use the capital letter of its name. The only
- exception is FFS, which will be activated by N (New File System). F
- is already used for FORMAT. As a bonus, you can use Q or ESC to exit,
- instead of hitting the close gadget. Finally, you can use RETURN to
- start a copy operation---which means GO for a non-buffered copy, and
- REPEAT for a buffered copy (see below).
-
-
- - VERIFY turns on and off verify at any time (you can also format
- without verifying)---but this is not recommended.
-
- - BUFFER allocates a buffer to make multiple copies. Once a buffer
- is allocated, you can select the same drive for source and
- destination, and you can select REPEAT to make another copy of the
- same disk without rereading the original. If DFC5 can't allocate an
- 880K buffer, it will try to allocate one for 2, 3 or 4 passes copies,
- and will alert the user accordingly (if no buffer at all can be
- allocated, a warning is issued). To do multiple pass copies, GO a
- first time, REPEAT the first disk chunk for all the disks you need, GO
- another time to read another disk chunk etc.
-
- - TALK activates DFC5's abilities to give its status by voice.
- Currently only English is supported.
-
- - FFS enables the formatting of an FFS disk; for copying it is
- ignored.
-
- - DATE toggles on or off the slight change of the date of an AmigaDOS
- disk. This change is necessary so AmigaDOS can distinguish otherwise
- identical disks; if two truly identical disks are inserted in the
- drives, AmigaDOS gets confused and crashes. However, if for some
- reason you want a ``physical'' copy, you would turn off this option.
- A non-AmigaDOS disk copied with the DATE option on will generate a
- warning, since this option will probably subtly corrupt the disk. You
- have time to switch off the DATE option, if you want, until the
- progress bar is in the middle.
-
- - STOP will stop at any time any operation. Note that pressing STOP
- while a multiple pass copy buffer is allocated and no copy operation
- is running will reset the pass counter (i.e., you can start a fresh
- new copy).
-
- - GO copies from the source to the destination if BUFFER is switched
- off, or copies from the source to the buffer if BUFFER is switched on.
-
- - REPEAT works only with the buffer, and writes it to all
- destinations. Note that when the buffer is on, you can select the
- same drive both in the source row and in the destination row. This
- allows, for instance, to read a source from df0: and then write it to
- both df0: and df1:.
-
- - FORMAT formats all destination drives. If VERIFY is selected, the
- process is verified.
-
- DFC5 will issue requesters if it finds an error on read, write, or
- verify. You can ask to retry the operation or you can choose that you
- don't want to bother yourself with it. If you want to stop, it's
- usually better to first press the STOP gadget and then cancel the
- requester, or another requester might be issued between the two
- operations. Note that errors from the Unit 4 are checksum errors of
- the RAM buffer.
-
- Because of a bug in the 1.3 trackdisk.device, a track with an error on
- a sector in it might be read completely wrong, yielding incorrect data
- even on the good sectors.
-
- Please note that you have absolute freedom in the use of the RAM
- buffer: this means some more care, too. For instance, if while doing
- multiple pass copies you STOP two times, the pass counter will be
- reset. But if you hit REPEAT at this time (before reading a new chunk
- with GO), DFC5 will write on what it thinks is the ``last pass read'',
- i.e., the last chunk of disk, even if this wasn't actually the last
- piece of disk read. If you STOP while you're reading into the buffer,
- DFC5 will not increase the pass counter, since it thinks you have put
- in the wrong disk or something like that. This means also that
- REPEATing at this time will write on the previous disk chunk, with the
- first tracks probably trashed by the stopped GO operation. So be
- careful. A more restrictive mechanism will be implemented in the
- 2.0-only release.
-
- The progress bar is drawn in a different color if you're doing a GO
- for a buffered operation---so you can be sure you read the new chunk
- in the buffer. Note also that the progress bar is not updated if
- something locked the screen (like using menus). The update is delayed
- until the screen is unlocked (thus DFC5 won't get stuck as will almost
- all programs which do any rendering to their windows).
-
- This program is in the public domain; anyone can do anything they want
- with it. This software is made available on an as-is basis; don't
- come to us if you destroy your entire fish disk library with it! Of
- course, it was tested rather extensively before it was released . . .
-
- Comments, complaints, desiderata are welcome.
-
-
-
-
- Tomas Rokicki Sebastiano Vigna
- Box 2081 BIX: svigna
- Stanford, CA 94309. Via Valparaiso, 18
- U.S.A. I-20144 Milano ITALY
-