>>Paul, what is the difference between the CMOS level serial channel on the
>>Newton and what Handspring calls a TTL level serial on the Visor? Is this
>>going to be an issue when I am attempting to cross-breed the 2100's
>>interconnect port with the Stowaway keyboard?
>TTL is transistor-transistor logic, CMOS is complimentary metal-oxide
silicon.
>There are significant differences between both, for example, power supply,
>protection from discharge, speed, etc. You cannot exchange them without
precautions.
There are converter chips available that will enable you to "marry" the two
technologies. So as Paul said you can't simply exchange them, but it's no
big deal to make them talk to each other.
Frank
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