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- Path: winternet.com!watt
- From: watt@parka.winternet.com (Bacon Runner)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: A2000 serial port too slow for 28.8K?
- Date: 15 Jan 96 03:35:06 GMT
- Organization: StarNet Communications, Inc
- Message-ID: <watt.821676906@winternet.com>
- References: <4cu0t7$v3i@xensei3.xensei.com> <1996Jan10.193805.11220@scala.scala.com>
- NNTP-Posting-Host: parka.winternet.com
- X-Newsreader: NN version 6.5.0 #2 (NOV)
-
- dave.haynie@scala.com (Dave Haynie) writes:
-
- >Most modems these days can speak to the computer at a fixed rate, no
- >matter what the modem's actual baud rate is. This was necessary to
- >support any number of the smart modem protocols in use today, like
- >intelligent speed drop-downs, compression, etc. Compressed data can
- >come over at over 100KBaud with some modems.
-
- But for the data compression to work, shouldn't the serial port speed be
- set higher than the modem speed?
-
- >You may run into trouble with the Amiga and these higher rates, in any
- >case. The built-in serial port isn't buffered. So when data comes it,
- >the CPU must be able to respond to an interrupt and read it from Paula
- >before the next byte comes in. This is usually better with a faster
- >processor, and will depend on your graphics mode and what else the
- >system is doing. 38.4KBaud is pushing it, no matter what you do.
-
- I have a 1200 030 and I run my SupraFaxModem 288 at 57600 with no
- problems. I taxes the CPU but I can still multitask without causing
- errors in a download.
- --
- Andy Wattenhofer
- watt@winternet.com
-