From: Keith Moore (moore_at_cs.utk.edu)
Date: Mon Jan 31 1994 - 12:54:58 EST
> does anyone actually *know* that the difference between the 16450 and 16550
> PCMCIA modems is real? Of course I understand the effect of the difference
> in the case of a normal serial port, but here we are talking about a
> simulation, and it is not technically obvious to me at all that the fact
> that the external simulated interface is 16450 will make it impossible to
> do "_ANY_" multitasking at all. comments?
If the modem has to interrupt the cpu 1440 times a second, it certainly
eats up a lot of the time available for other things.
By contrast, a properly-programmed simulated-16550 would only interrupt the
cpu one sixteenth of that time.
Keith
This archive was generated by hypermail 2.1.3 : Thu Jan 23 2003 - 09:52:17 EST