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- Subject: the FORMATTER
-
- Well, I have finished the latest version of the FORMATTER. Here are the
- enhancements:
-
- * will load in either FORMAT.RSC for color display, or
- will load in FORMATBW.RSC for monochrome display.
- * FORMAT and EXIT buttons do not act as touchexits (I was using my own
- button handler)
- * right button will not create an exit condition for buttons (caused a
- problem when clicking on it to exit from a Double Click alert box, and
- had the mouse over a button)
-
- Use the FORMATTER to format all of your disks, it is completely compatible with
- TOS. Except disk copies of the 10 sector format. Yes, TOS will copy a disk
- with 82 tracks to another with 82 tracks using disk copy. File transfers are
- compatible in all formats. For some reason, the 10 sector format using the
- FAST read format does not really read faster. I believe this is due to the
- small I/O buffer used by TOS. The preferred format for 2x I/O speed is 9
- sectors, either 80 or 82 tracks. I personally format everything with 82 tracks
- and 9 sectors, unless I need raw storage.
-
- enjoy,
- Mike Vederman
-
- -------------------------------------------------------------------------------
-
- To answer several people's questions.
-
- The Formatter does not modify the operating system in anyway. It is a
- stand-alone program which has the modified format code in it. You can use
- the formatted disks just as you would a normal disk. TOS has no idea that the
- disks are different, unless one is 80 and the other is 82 tracks. You can do
- disk copies or file copies of disks, assumming that the format size (tracks
- and sectors) of the two disks are the same.
-
- What the formatting algorithm does is this. Bad sectors are placed at the
- end of all the tracks formatted. When the WD1772 hits a bad sector, BOOM!
- the chip stops instantly with an error, and goes to the next track. In this
- way, the WD1772 doesn't have to wait for synch info, it just goes.
-
- -------------------------------------------------------------------------------
-
- The Formatter which I posted recently does this to the disk...
- It places three bad sectors at the end of each track. It does this by
- creating the sector, then placing a bad crc in the header. When the WD1772
- sees the crc error, it gives up unconditionally. This accounts for the
- increased speed.
-
- NOTE: The 10 sector format does not give an enhanced speed, this is probably
- due to the I/O buffer, but I don't know for sure. The fastest speed is gained
- from single sided with 9 sectors per track, on either 80 or 82 tracks. Double-
- sided disks seem to be a bit faster, but it is not as noticable as with SS.
-
- If you want raw storage, then go to 10 sectors on 82 tracks. Yes, TOS will
- disk copy 9 sectors on 82 tracks, it is not THAT dumb, and you will even see
- the status box go past the end when it reaches the last 2 tracks. TOS will
- NOT however properly copy 10 sector formats. I am currently working on a
- copier that will do this, and probably add it to the formatter.
-
- I have never seen any disks formatted beyond 82 tracks, altho I have seen
- copiers which allow for 83. The drives seem to vary in capabilities. I have
- a friend who cannot format 82 tracks on one of his drives, but can on the
- other drive. The one that CAN'T just clunks at the end. Be cautious and
- alert when you do extended formats. I have NEVER had any problems, and most
- of the people I know don't either, but there is always the exception.
-