Re: More Information for MFM Drives

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

    My point is to build USB Device Driver with low level hardware.  It
means that I can build USB-Adapter Printed-Circuit Board that it can be used
both internal and external connecting to standard MFM floppy drive.
USB-Adapter PC Board will have an ability to read and write both GCR and MFM
formats.  It will plug on any PC machine and Macintosh machine.  It will
save a lot of time to do with transfer through cable and/or ethernet
network.
    It may be possible for me to design to build 1.5Mbps or 12Mbps (Depend
on Power Current) USB controller card for Apple II+ and //e.  It will have
another possibility to connect USB cable to Apple IIgs' ADB keyboard without
needing to use USB controller card.
    Yes, it is true that it does not exist, but it is my project that I am
working on this.

--
Yours Truly,

Bryan Parkoff
BParkoff@satx.rr.com
"Bryan Parkoff" <BParkoff@satx.rr.com> wrote in message
news:zXkB8.75131$Ii2.6607605@bin2.nnrp.aus1.giganews.com...
> More Information for MFM Drives
>
>     I know that we have already discussed the MFM drives couple months
ago,
> but I want to give you the consideration about one or more ideas to
overcome
> the hardware's design.  Please try to answer only one question below.
>
> My question:
>     MFM controller card is designed to detect the beginning header bits
> before it begins to read only 512 bytes at this time.  The hardware's
design
> does not allow me to manipulate by reading each bits instead of bytes
> however it has its own manipulation.
>
> Your answer:
>     Is it correct to my one question above?
>
>     If my question is answered yes, it means that there is no way to FORCE
> hardware's design to be modified in order to manipulate.  For example, it
> can only read/write 720KB and 1.44MB.  It does not allow me to modify the
> size such as 800KB and 1600KB.  If it is to be Universal (Not USB) MFM
> drive, yes, it will be possible to modify the size.
>     It is my goal to begin to design and build USB device driver that will

> support ANY sizes including GCR + MFM formats by using low level through
USB
> device driver which it is the independment hardware rather than
> stupid--old--traditional MFM hardware.
>     What do you think?  Please advise.
>
> --
> Yours Truly,
>
> Bryan Parkoff
> BParkoff@satx.rr.com
>
>
>