Craig Ford to Gene Lowry
> Gene Lowry wrote the following to Bill Kirby, and I quote (in part):
>
> BK> Oooooooooooh yes I do ! 16550a !
>
> GL> This may or may not be part of your problem, original NS16550A
> GL> chips had problems with the implementation of the FIFO, I'd think
> GL> you should be looking for an NS16550AN or later chip.
>
> It was the origianl NS16550 that had the problem (I had one in an IBM
> Model 60), the 16550A is quite suitable.
Ah, a kindred soul. My Model 80 had it, too.
It was one of the originals, and had about 10
patches on the MB.
But the way I heard it, the original chips
were 16550. They had the bad FIFO, so the
manufacturer redesigned them into the 16550a.
But _they didn't work right either, so they
redesigned them into the 16550af, the f
presumably being the fth try to get it right.
The final chip was the 16550afn, the n meaning
it had a plastic case instead of ceramic.
* KWQ/2 1.2i * Guelph ON
--- Maximus/2 3.01
---------------
* Origin: Batman BBS, Waterloo,Ont. USR DS V.34+ (519)886-3437 (1:221/1401)
|