floppies

On 04/19/2013 09:45 AM, geneb wrote: The amproLB+ is the Z80 powered board. The cpu is without DMA and not fast enough to do 1.44. The drives are Sony 70s (80tr, 2 side, 782kb format). They are older PC drives from the time when 3.5" floppies had a drive select switch or jumper like the 5.25 units did. Very reliable too. That system has a 45mb Fujitsu scsi disk. The kaypro4/84 uses them as well with the Advent TurboRom and Disk Personality board The front panel has a 5.25 and there are three 3.5", two in the remaining panel hole and another inside with the boot disk. They run in 782K format as the machine can't do disk IO at 1.44 speeds. With the 4 drives there are about 3mb of storage total. I also have a SB180 (micromint) in an old PS2 case and uses the PS2 drives directly and they also do 782K format. I used that case as I needed the power for a 20mb disk and Adaptec SCSI to MFM controller. I never adopted 1.44media with exception of PCs as it was default for them. For those I use toshiba, teac, newtronix, and a few others (I have a box of PC floppy drives). They are very infrequently used and likely no new machines I build will include them. Even though most ITX board do have a floppy interface. Primary portable storage on PCs are CD, SD, CF, and USB as they hold enough for what I do. For older machines floppies are used where controllers exist. though I work to fit more modern media where possible. Allison