Benchmark Wars (was Re: gauging interest in VAX 6000-530)

From: Dwight Elvey <elvey_at_hal.com>
Date: Mon Oct 25 12:07:09 1999

Chuck McManis <cmcmanis_at_mcmanis.com> wrote:
>
> As an empirical note the 16450 UART often could not be serviced fast enough
> by the 486DX66 to prevent it from dropping incoming characters above 9600
> baud.

Hi
 The problem with dropping characters was because of slow video
in scrolling the screen. I rewrote a scroll that did one
line at a time and then checked the UART. It was able to handle
text at 115.2K without any UART buffering at all. It did have a
software fifo for the input though. So, it can
be done, you just have to know the bottle neck.
Dwight
Received on Mon Oct 25 1999 - 12:07:09 BST