From: utzoo!decvax!cca!hplabs!menlo70!sytek!zehntel!teklabs!tekmdp!dadla-b!dadla-a!steve@sri-unix Newsgroups: net.micro Title: Re: A/D on a TRS-80 Article-I.D.: dadla-a.214 Posted: Tue Jul 27 12:12:38 1982 Received: Thu Jul 29 04:40:27 1982 The TRS-80 Color Computer has four built in A/D channels (for the joysticks) with 6 bit resolution between 0 and 5 volts. They are not particularly fast (you didn't say what speed you needed) - say less than 10 samples per second (if that). A 32K color computer is about $700 (they just dropped the price), your first mini-floppy is $600 and each successive one (up to 4) is $400. (The first drive includes the disk interface.) Here's the best part: You don't have to mess with primitive processors like Z-80's or 6502's - the CC has a 6809 in it. I own one and have been pretty happy with it (though the inability to put both text and graphics on the screen at the same time is a considerable annoyance). Steve Den Beste Tektronix