DFACE DXA
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Note that there are cases of PCs with chipsets that do not support Single Density operation. However, it is not as common as portrayed out on the Internet - those who it didn't work for are vocal about it, while those it did work for remain silent ("How can you say it works for most PCs when it doesn't work on mine…?"). The PCs known about so far that do not support Single Density are:
* Dell Latitude XPi P133ST laptop - no Single-Density support at all.
* Dell Dimension XPS T500 - possibly read only 5¼" Single Density. [Paul Jenkinson]
* Olivetti PCs - no Single-Density support at all. [Mark Ferns]
* Advansys card - reported to read only Single Density. [Mark Ferns]
* Platinum PackardBell P3 500MHz - read-only Single Density. [Colin McDougall]
If you find more, or wish to clarify which particular machines are afflicted, please contact support.
To test single density support on a PC, get hold of a known, working floppy disk drive, and a known good double-density floppy disk (one with only one hole in the top - not a High-Density one). First make sure that a double-density format works, by, for example, formatting the disk to Acorn BBC DDOS 720kB, then reading it back in - it should be recognised as this format and should read without error. If this works, try re-formatting the disk to Acorn BBC DFS 400kB, and try reading that back in - if the disk is not recognised as BBC DFS 400kB or it cannot be read back in then it is reasonable to assume your PC does not support Single Density.
this is all from the omni flop page
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