🚀 go-pugleaf

In article <441@wang.UUCP> lee@wang.UUCP (Lee Story x77155 ms 019 890) writes:
>In article <8254@clyde.ATT.COM>, saf@moss.ATT.COM writes:
>> 
>> The only problem is that again, you can't do this with the standard driver,
>> you have to write your own.
>> 	Steve Falco   AT&T Bell Laboratories
>
>The rest of Steve's posting seems impeccably accurate, but I must take issue
>with the comment that the standard driver won't support external clocking.
>Indeed, you have to retrieve the SCC's control address from low memory and
>poke the chip into "clock channel A from TRxC" and "divide-by-(16,32,64)",
>but having done so, I've had no trouble running MIDI data capture, filtering,
>rechannelizing and echoing utilities written entirely in Lightspeed Pascal
>(even the poking for setup is done in Pascal).  The ROM serial driver of
>the Mac+ works fine and is remarkably efficient.
>I can't guarantee that the 64K ROM driver or the RAM driver work,
>but I suspect suspect that they do.
>
>	Lee Story @ Wang Labs

I've done the same on my 512e(quivalent). RAMSDOpen followed by "clock channel
A from TRxC" and "divide-by-(16,32,64)" works very well as long as you don't
need your driver to time stamp the data (which I don't).

	Ben Stoltz
	stoltz@sun.com