SD Card disk drive for C-64?

[drlegendre .]

Pardon the quick re-post..

FYI, you don't actually need a BASIC program to change a drive ID. This
'one-liner' will do the job just fine:

OPEN 15,8,15:PRINT#15,"M-W";CHR$(119);CHR$(0);CHR$(2);CHR$(*device number*
+32)+CHR$(*device numver*+64):CLOSE 15

Again, this change will not persist between drive (and possibly IEC bus)
resets. The drive will reset to its original hardware-assigned device
number (8 on an unmodified drive) upon reset.

On Sat, Jan 23, 2016 at 7:15 PM, drlegendre . <drlegendre at gmail.com> wrote:

> " I am saying don't make a permanent hardware change to a 1541 that
> does not have the switches unless you really want it to be permanent
> because there is a software method of assigning drives that is good enough
> most of the time.  BUT if you must make it permanent and you don't have the
> external switches, consider adding some form of external switch so you
> don't ever have to open the case again to put it back to the default."
>
> Well then, we're having a major agreement. ;-)
>
> The device ID switch is the ultimate fix for Commodore drives, and I'm
> really not sure why CBM didn't incorporate one into the design - at least
> from the 1540 on upwards. Can't have cost much to add a discretely located
> access hole (or a knock-out) in the case, along with a 2-place DIP switch
> for controlling device ID.
>
> Grumble grumble..
>
> On Sat, Jan 23, 2016 at 6:33 PM, Jim Brain <brain at jbrain.com> wrote:
>
>> On 1/23/2016 6:28 PM, Eric Christopherson wrote:
>>
>>> On Sat, Jan 23, 2016, Jim Brain wrote:
>>>
>>>> On 1/23/2016 2:18 PM, drlegendre . wrote:
>>>>
>>>>> 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.
>>>>>
>>>> Google is still a friend:
>>>>
>>>>
>>>> https://www.google.com/search?q=sd2iec+change+device+numbers&ie=utf-8&oe=utf-8
>>>>
>>>> There are no external switches on some of these drives.
>>>>
>>>> But, the BASIC commands used to switch device numbers on the 1541 also
>>>> work
>>>> on these units, and putting an extra char at the end of the command will
>>>> make the changes permanent, as I recall.
>>>>
>>>> Jim
>>>>
>>> Jim, don't you sell a device that's useful for temporarily switching off
>>> specific drives so the device numbers can be changed more easily?
>>>
>>> QuadPortIEC, but you can also just switch the ATN line on the cable.
>> Disabling the ATN (Attention) line means the drive will not respond to any
>> commands.
>>
>> Jim
>>
>>
>> --
>> Jim Brain
>> brain at jbrain.com
>> www.jbrain.com
>>
>>
>