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From: palmer@nntp-server.caltech.edu (David Palmer)
Newsgroups: comp.sys.mac.hardware,comp.sys.mac.programmer
Subject: How fast can the serial ports go?
Summary: How fast?
Keywords: maximum throughput
Message-ID: <1991Feb2.062244.3235@nntp-server.caltech.edu>
Date: 2 Feb 91 06:22:44 GMT
Organization: California Institute of Technology, Pasadena
Lines: 24

I'd like to build some hardware that stuffs data as fast as possible
into the serial port of the Mac.

I know the tricks used in MacRecorder:
	1) External clock, with a clock rate equal to the bit rate
	2) turn off interrupts
	3) access the serial port hardware directly
	4) tight software loop

Given that, how fast can you run the serial ports on the various
models of Mac?

Is there any way to avoid breaking the Apple rules to do this sort of
thing?

Any other tricks?  (I am not ready to go SCSI).

Thanks in advance.

-- 
		David Palmer
		palmer@gap.cco.caltech.edu
		...rutgers!cit-vax!gap.cco.caltech.edu!palmer
	"Operator, get me the number for 911"  --Homer Simpson