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- Path: sparky!uunet!uunet.ca!kink!hugh
- From: hugh@kink.PhaedraV.On.Ca (Hugh D. Gamble)
- Newsgroups: comp.sys.amiga.hardware
- Subject: Re: C=2232 multiser @ >>19.2Kbps??!!
- Message-ID: <gGcfs*Hm1@kink.PhaedraV.On.Ca>
- Date: Tue, 05 Jan 1993 04:07:44 EST
- References: <rlcarr.09ec@animato.network23.com>
- Distribution: world
- Organization: Phaedra V
- Lines: 35
-
- In article <rlcarr.09ec@animato.network23.com>, Rich Carreiro writes:
-
- > > Apparently the fastest speed the serial.device driver for the 2232 is
- > > 19.2Kbps. I would like to run it at either 38.4Kbps or 57.6Kbps.
- >
- > You can't. The A2232 only goes up to 19200 (other than that funny MIDI rate).
-
- That is incorrect. The A2232 hardware documentation specifies that any
- one port can run at 115,200bps and all the others at 19,200. The
- documentation is even correct. :-) 115.2kbps happens to be exactly
- what you want for running a Telebit Worldblazer. You cannot run it at
- 38.4k or 57.6k however (without changing the h/w as George suggested).
- My recollection is that it also does not support MIDI data rate, but
- I'd have to look it up.
-
- There are other serial boards that can go up to >600kbps
- theoretically, (including the GVP I/O Extender, and I think the
- venerable ASDG DSB can go that fast too) using 16 byte FIFO UARTS but
- the A2232 is still the only on I know of with its own CPU.
-
- If anyone has data on CPU load at high serial in/out speeds for
- different boards, I'd love to see it. Especially a comparison of the
- A2232 running one port at 115.2k with its on board CPU vs. one of the
- other boards using the Amigas main CPU (but with a larger buffer than
- the 1 byte motherboard CIA chips). I find that running the motherboard
- serial port at 38.4k (uucp using ser_f_radboogie) puts the CPU load of
- an A2500/20 at about 50%.
-
- --
- # Hugh D. Gamble UUCP: hugh@kink.UUCP Domain: hugh@kink.PhaedraV.On.Ca %
- # AMIX: HGAMBLE bix: hgamble voice: +1 416 267 6159 %
- # '"U.S. is more restrictive than other places, except maybe Canada." %
- # The kindler, gentler fascists to the North don't consider any form of %
- # self-defense legal.' - Mondo 2000 No. 8 %
-
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