Subj : Re: Making a .d71 out of two .d64 images
To   : Andreas Kohlbach
From : Tristan Miller
Date : Fri Jan 31 2020 09:49 pm

Greetings.

On 31/01/2020 20.06, Andreas Kohlbach wrote:
> On Fri, 31 Jan 2020 12:41:00 +0100, Tristan Miller wrote:
>> I'd like to play Ultima V in VICE.  This game came on four double-sided
>> disks, which entailed a lot of disk-swapping.  But if memory serves, the
>> C128 version of the game supported up to two drives, and if the drives
>> were 1571s, the game would automatically read the correct side of the
>> disk for you.  So with two 1571s, instead of one 1541, you could cut the
>> number of disk swaps by factor of 4.
>>
>> The problem is that the only disk images of the game I have are .d64
>> images of the eight individual sides.  Is there any way of combining two
>> .d64 images into a single .d71 image?  Or is my only option to buy a
>> floppy drive capable of reading double-sided disks and the requisite
>> imaging software, and then manually re-image all the physical disks?
>
> The 8bitguy on YouTube just released a video about Commodore disk
> drives. The 1571 head two heads, thus could read both sides of a floppy
> without turning it around, if made for the C128.
>
> It also could read C64 (.d64) disks. But in the 1541 you would turn
> around a disk to read the other side. That means that a 1571 could not
> read the second side as the rotation of the disk would be the wrong way
> (you would not turn the disk around as on a 1541). Thus I don't think
> it's possible to run a double-sided 1541 disk on the C128 using a 1571
> drive.

Ah, so maybe I was misremembering about not having to flip the disks.  I
think VICE allows you to create a list of disk images and then swap
between these with a shortcut key, so that's probably another avenue for
me to try.

Regards,
Tristan

--
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                   Tristan Miller
Free Software developer, ferret herder, logologist
              https://logological.org/
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