CoCo Info Needed...

Otay, here's the situation, and I need some help, folks... I've got a "new" project in mind, that I need to use my old computers for, specifically CoCo's. I need to build at least a few temperature controllers, and I wanted to use the internal ADC in one of my CoCo's, but I'm not sure if they're high enough resolution... (6-bit) - until I remembered the Hi-Res Joystick Adapter for the CoCo3 that plugs into both the joystick port & the cassette port. Now, does anyone have any info on the hardware & programming of that port? I remember that the gizmo mimiced the resolution of the CoCo3, as in 640 (methinks it was around 10bit, wasn't it) distinct steps, and I think it used the DAC of the cassette port in conjunction with the ADC of the joystick port, but I have no idears about how to program the rascal, or how to replicate it (I could use *at least* 2, and I only own one myself)... I've searched some of my Rainbow's to no avail (methinks Hot CoCo was already bought out by then...) but my collection stops around December of '86, and I thought in '87 there was an article or two on just how that thingy worked. Any info at all would be most appreciated, and thank you very much in advance for any help y'all can provide. Oh, BTW, if you do reply privately, my zmerch(a)30below.com address is presently being flooded by double-bounces (I'm a sysadmin at a small ISP) privately, use zmerch7(a)yahoo.com or ab8kk(a)eudoramail.com. Thanks Much, Roger "Merch" Merchberger -- Roger "Merch" Merchberger --- sysadmin, Iceberg Computers Recycling is good, right??? Ok, so I'll recycle an old .sig. If at first you don't succeed, nuclear warhead disarmament should *not* be your first career choice.