Re: GCR <--CP/M --> MS-DOS and vice versa?

["Bryan Parkoff" <BParkoff@satx.rr.com>]

    I am surprised that there is too much discussion.  It is very
challenging by trying to read/write GCR/FM/MFM and other format scheme into
a single 5.25" drive.
    If you try to invent 7-1 encoding on GCR format, it could be almost
impossible because 6-2 encoding uses 64 characters and 7-1 encoding uses 128
characters.  Some characters out of 128 characters have three or four zero
bits that they are INVALID by Apple II Disk Controller Card that is
manipulated by HARDWARE while we tell SOFTWARE to do with soft sector.  It
is very interesting.
    It will be an example that you receive UNKNOWN diskette and/or microchip
that contain data information from another planet like Universal Translator.
It will give you THOUSAND years to solve the problem by analyzing data
structure using bit sequence.  Would you be willing to DONATE your time
doing that?  My answer is NO.  It is a wasting time.
    There has to be ANOTHER WAY to overcome the hardware limitation.  MFM
drive can only be MANIUPLATED by HARDWARE while GCR drive can be MANIUPLATED
by BOTH HARDWARE AND SOFTWARE.  We have to add SOFTWARE to the MFM drive.
Both hardware and software will work together flexibility.
    You have to add couple commands to the hardware which hardware is
allowed to ADJUST the speed, timing, head arm, and head movement.  You will
be more than happy to access data from both GCR/MFM scheme on the same
floppy drive.
    I remember the third party from Zealand has ISA controller card that can
do with GCR/MFM scheme.  It can do with any type of formats plus
incompatible formats.  I can't remember the exact name of ISA controller
card.  I am sure that someone will post as soon as possible.
    Like I said on the previous newsgroup, we can be able to build USB
printed circuit.  We can send software to USB WHILE USB can do hardware to
work with GCR/MFM scheme.  I am positive sure that it will work.


--
Yours Truly,

Bryan Parkoff
BParkoff@satx.rr.com