SD Card disk drive for C-64?
drlegendre at gmail.com
Sat Jan 23 14:18:10 CST 2016
First off, my bad - I thought the OP was wanting to change the device ID
(which is not the drive number, btw**) on a genuine 1541. I'd have no idea
how it's done with one of the SD-based drive emulators.
"Given the potential flakiness of 1541 drives, why make permanent hardware
changes when a basic program allows you to assign the drive to whatever you
want for the temporary need of the day?"
Though I'm not entirely sure it exists, any "potential flakiness" is
probably a very good reason to make the change in hardware. Device IDs
assigned via software (with a M-W command to the DOS) don't persist between
drive resets and may not persist between serial bus resets either, for that
matter. So if the drive does screw up and requires a power cycle, you're
back to device 8 again afterwards. This means shutting off one drive,
re-assigning the device ID to 9 or whatever, then powering on the second
If you're using more than two drives, it really becomes a hassle. In any
event, just install a switch (or pair of them..) on each drive and all is
(** Devices on the CBM serial bus (or IEC bus) have device IDs, with the
disk drives usually being 8,9,10 and 11. Each device can actually have two
physical drives, 0 and 1. Now in the later era (1540 and beyond) there's
only one physical drive per device, which is device 0, the default. But in
case you ever wondered why the correct syntax for a DOS command has this
"extra" 0:, now you know - as in OPEN 15,8,15,"I0:". It's explicitly
specifying drive 0.. as opposed to drive 1.)
On Sat, Jan 23, 2016 at 8:00 AM, william degnan <billdegnan at gmail.com>
> > >
> > > >
> > > > Also having rtouble hooking up my original floppy drive as " LOAD
> > > > ,9,1
> > >
> > How are the jumper on the reak floppy to be set?
> Have you tried to simply run a basic program to temporarily reassign the
> drive number? This is documented on the web. For example see page 39
> here (ignore the fact that this is for a VIC 1541, the method is
> Given the potential flakiness of 1541 drives, why make permanent hardware
> changes when a basic program allows you to assign the drive to whatever you
> want for the temporary need of the day?
> Try the following for your SD card drive, My case is different but the
> insides are the same
> At the bottom the thread there is a link to more info.
> Google is your friend, he misses you.
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