i had read somewhere on this list i think that the original (128, 512, Plus) Mac mouse interface was some custom serial job.
old PC mice on the other hand are usually standard RS-232 devices On Thu, Dec 10, 2009 at 9:00 PM, Ken Daggett <[email protected]> wrote: > > On 10 Dec 2009, at 17:47:43 PST, James Fraser wrote: > > > Would someone be kind enough to briefly explain the difference > > between a PC-AT DE-9 connector and that of the DE-9 found on the > > back of a Mac Plus? > > > > I'm guessing that a PC-AT mouse will not work on a Plus because > > pins 4,5,8, and 9 on the PC mouse are different. That is, the PC > > mouse has no way of generating the appropriate "interrupt" line and > > "quadrature" line signals in the first place and, secondly, the > > pinout doesn't allow for any way for any such signals to be sent to > > the Plus > > > > I ask because I am looking for an alternative pointing device to > > use on a Plus. While I like the boxy stock mouse for nostalgia > > purposes, it's just *excruciating* to use for a prolonged period > > compared to later model mice (meeses?). I would love to be able to > > use an old Logitech trackball I have that has a PS/2-serial > > adapter, but I know it won't work. > > > > It's the exact "why" that still seems to elude me. Anyone? > ---------------- > Just because Apple used the same 9 pin connector, they look the > same, but that is about all the similarity. I have never heard > of any other "pointing device" that can be used with a Mac Plus. > -- ----- You received this message because you are a member of the Vintage Macs group. The list FAQ is at http://lowendmac.com/lists/vintagemacs.shtml and our netiquette guide is at http://www.lowendmac.com/lists/netiquette.shtml To post to this group, send email to [email protected] To leave this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/vintage-macs Support for older Macs: http://lowendmac.com/services/
