Subject: Re: silo overflows, was fifo overruns
To: Brad Salai <email@example.com>
From: David Jones <firstname.lastname@example.org>
Date: 11/11/1997 18:22:56
Brad Salai wrote:
| At 11:43 AM -0800 11/11/97, "Erik E. Fair" (Time Keeper) wrote:
| >The IPX and SS2 are the fastest stock sun4c systems (40 MHz). If it's still
| >unusable at 38400, we still have a ways to go.
| > Erik <email@example.com>
| This is bound to sound like a whine, but is not, just a little frustration.
| I switched from a 16MHz MacII 68020 which had no trouble with 38400 or
| higher, to a Sparc, to get more speed.
Amiga 3000 (16 MHz 68030, custom UART, no FIFO, no hardware flow control)
- Does 38400 no problem.
Sparc IPC (25 MHz sun4c, zs8530, supposedly 16-character FIFO)
- Drops characters at 19200.
The problem is the 8530: it is a very slow part; it must be accessed at
most once every 2us.