Re: GPIB to USB interface

libusb is needed. I happen to know a little about this.  :)

On Apr 15, 2012, at 3:18 PM, André Fachat wrote:

> 
> Not sure is libusb is necessary. The XS1541 connects as serial device (IIRC with an FTDI serial-to-usb adapter).
> 
> Don't know about the ZoomFloppy though
> 
> André
> 
> -------- Original-Nachricht --------
>> Datum: Sun, 15 Apr 2012 09:49:01 -0700
>> Von: Nate Lawson <nate@root.org>
>> An: cbm-hackers@musoftware.de
>> Betreff: Re: GPIB to USB interface
> 
>> 
>> On Apr 15, 2012, at 7:42 AM, Jim Brain wrote:
>> 
>>> On 4/15/2012 4:18 AM, A.Fachat wrote:
>>>> Yes, the route to use CBM drives from the PC seems to be the exclusive
>> route these days.
>>>> 
>>>> But I am also looking into using the PC as a floppy drive for my PETs.
>>>> 
>>>> I have done this over a serial line for my own 6502 operating system,
>> so a server side is actually available. It's "just" a matter of writing an
>> atmega client that works as drive and communicates with the PC via serial
>> over usb.
>>>> 
>>>> I even have an XS1541 here but didn't have the time... But since my
>> homebuilt printer-port ieee488 interface for the PC broke, and I am using
>> cn232 with my only PC left with a serial i/f, the pressure gets stronger...
>>> The ZoomFloppy hardware should support using the PC as a FD/HDD, and
>> there is plenty of room in the uC for more code.  Alas, there's no code to
>> implement that feature as yet.
>>> 
>>> Jim
>> 
>> 
>> It can, but someone would have to write the firmware and host side of
>> things to support that.
>> 
>> Basically, it would be the following:
>> 
>> Firmware would watch ATN/RESET inputs and respond to basic drive commands
>> (talk, listen, etc.) No need to implement more advanced stuff like M-E
>> (memory execute).
>> 
>> Host would have a libusb program that polls for commands from the xum1541.
>> Commands would correspond to the above ROM commands.
>> 
>> Code could probably be adapted from the sd2iec project, which provides a
>> virtual floppy drive backed by an SD card. You would just send commands over
>> USB to access floppy images on the host side instead of the FAT fs and SD
>> card driver in the sd2iec.
>> 
>> http://www.sd2iec.de/
>> 
>> -Nate
>> 
>> 
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> 
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