[Coco] New "product" announcement...
gheskett at shentel.net
Fri Mar 10 14:29:34 EST 2017
On Friday 10 March 2017 10:59:50 Allen Huffman wrote:
> From Vaporware Productions...
> I've been playing with John Strong's sound device, and am hooking an
> RS232 interface to it so I can hook it to the CoCo's Serial I/O port
> and send control bytes to it via PRINT#-2 (or BASIC09). The end result
> is a cheesy way to have multi voice music, even in BASIC, with no
> I think I fried one of my chips last night, so my experimenting has
> halted, but as soon as I fix it, I'll post a demo. --
> Allen Huffman - PO Box 7634 - Urbandale IA 50323 - 515-999-0227
> (vmail/TXT only) http://www.subethasoftware.com -
> https://www.facebook.com/subethasoftware Tips accepted:
> Sent from my iPad.
Allen: One should be aware that there is a buffer for that port in the
SALT chip, and I blew one early on in my attempts to configure drivewire
so I had a feedback loop. That continuous signal warmed the SALT chip
up and destroyed it. Your playing music thru it may have had the same
effect as thats pretty continuous switching too. So if you have a scope
and the schematic, it would be the first thing I'd check. I did at the
time, find some NOS SALT chips online, but no clue what I paid at this
late date. Drivewire, when configured correctly, and despite the speeds
it runs at, seems to give the chip adequate interpacket cooldown time to
avoid the problem.
I haven't done it, but one or 2 in a row of those peel and stick heat
sinks like for the pi's & kin, might not be too bad an insurance policy
as the salt does seem to run warm in normal service.
Cheers, Gene Heskett
"There are four boxes to be used in defense of liberty:
soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Genes Web page <http://geneslinuxbox.net:6309/gene>
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