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From : Sergei Frolov 2:5030/219.9 Чтв 27 Мар 97 21:38
To : Maxim Polyanskiy Суб 29 Мар 97 01:31
Subj : Rs232
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Hello Maxim!
MP> А может кто-нибудь расказать про 8250B и 16C450?
Может, поможет.
=== Cut ===
16450
The 16450 seems to be a speeded up version of the 8250A. There is no
direct way (that I know of) for software to detect the difference
between an 8250A and a 16450. I believe the 16450 was developed to
eliminate the need for software to insert delays between successive
accesses to the device. The specifications indicate the 16450 is a
much faster device than its predecessors. The additional speed is
only the speed at which the processor can access the device. The
maximum baud rate for the 16450 is still stated at 56kb. However, I
have been told by some people that they have run the 16450
successfully at much higher speeds. I do not believe there was ever a
16450A.
16C451
The 16C451 is a CMOS version of the 16450. CMOS is a term for the
material and manufacturing process used to make the part. CMOS
typically uses less power than other technologies. If you are not
designing hardware, you should view the 16C451 as a 16450.
=== Cut ===
Sergei
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* Origin: Теперь, что бы не случилось, я улыбаюсь! (2:5030/219.9)
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