I believe the problem with some newer Mac models is the number of sync bytes (bit-slip markers) at the start of each sector on the floppy. Newer Macs only write 3 sync bytes instead of 5, so the Lisa hardware can't reliably synchronize with the bitstream. That's a different issue than tag bytes and Disk Copy 6.x issues - though both questions are important for making a working Lisa floppy. But it sounds like the original poster is able to create working Lisa floppies without problems, and is mainly just looking for where to download the software he/she is interested in.
Here's a bit more about the 3 vs 5 sync bytes issue, from lisafaq.sunder.net/lisafaq-hw-media-floppy_dc42.html
Preferred hardware and software for making floppies compatible with the Lisa
For trouble-free results, use another Lisa or a Macintosh 128K, 512K, 512KE, or Plus for making disks for use in a Lisa.
Although newer Macintosh models may appear to make disks usable on a Lisa, there are circumstances where some data will not be readable by Lisa hardware. In these cases, using DiskCopy 4.2 to duplicate the disk onto itself is likely to make the disk usable on a Lisa.
If you must use a Macintosh II or later, use:
- an 800K drive (instead of the 1.4M High Density SuperDrive)
- DiskCopy 4.2
- If the image is in DART format, make the disk with DART, then use DiskCopy 4.2 to duplicate the disk onto itself (this corrects the disk to have 5 bit-slip-FF's as required for the Lisa hardware)
To check whether a disk made in another machine is readable on a particular Lisa, mount the disk using FEdit Plus on the Lisa running under some (any) version of MacWorks and have it read every sector (eg. by searching for something, or put a weight on the mouse button). An I/O Error indicates some sector could not be read.
Technical Explanation: The Lisa floppy disk controller (FDC) anticipates 5 bytes of "bit-slip-FF" to synchronize its state machine to an address mark or data mark. The Macintosh FDC was improved to need only 3 bytes of bit-slip-FF, however use of this improvement was only implemented in the Macintosh II ROM and later.
The result is that some sectors of a disk written by a Mac II or later may not be readable by a stock Lisa FDC. This includes disks initialized on such a machine, as well as any file/directory data written on such a machine.
The rare exception is DiskCopy 4.2 which bypasses the floppy driver and accesses the floppy hardware directly. It happens that DiskCopy 4.2 writes 5 bit-slip-FF's even on hardware as recent as the beige G3 desktop, and regardless of whether the source disk/image used 3 or 5 bit-slip-FF's.
The number of bit-slip-FF bytes on a particular floppy can be determined using a PC with the Central Point "Deluxe Option Board", which has the capability of reading individual magnetic transitions on a disk.
For further information about bit-slip-FF bytes and the GCR encoding of Apple floppies of this era, see the Apple II book "Beneath Apple DOS".
MacWorks Plus II includes a Programmable Frequency Generator (PFG) that provides real-time adjustment of the FDC timing under software control, enabling MacWorks Plus II to read almost all Macintosh disks written with 3 bytes of bit-slip-FF.
