Re: Early Mac Mouse --> Apple II Mouse Card ?

[geary@io.com (Big Bird)]

In article <20020308032212.11054.00000589@mb-cu.aol.com>,
Michael J. Mahon <mjmahon@aol.com> wrote:
< David Wilson wrote:
< 
< >"Sean" <sean@snerts-r-us.org> writes:
< >>ABSOLUTELY. The VERY early mac mouse - 128, 512 and 1 meg plus macs all had
< >>the same maouse as the iie/iic mouse. DB 9 connector.
< >
< >Similar but not identical. I have heard that some Mac mice do not work
< >on the //e mouse card.
< >
< >It is not a DB-9. It is a DE-9. The letter tells you the size of the
< >connector and the number is the pin count.
< >
< >DE-9
< >DA-15
< >DB-25
< >DC-37
< >DD-50
< >
< >A DE-15 would describe a VGA video port.
< 
< All very true, but a truly broken nomenclature, and almost
< totally disregarded for the last few years, at least in the USA.
< 
< Broken:  Note that the pin count is redundant if the letters
< are properly used.  But the letters are out of order (and

< [...]

< In this way we eliminate the need to remember the totally
< non-mnemonic second letter and instead use the intuitive
< pin count to nail it down.  (Oh, and M or F should be part of

If we drop the second letter, how would one distinguish a DE-9 from a
DE-15 from a DA-15?

Mark Geary
-- 
    "Build high for happiness."