quimbyjs@mentor.cc.purdue.edu (Jeff Quimby) (11/04/90)
I am currently working on a project to receive NOAA polar orbiting satellite pics. The hardware includes an AM Demodulator A-D converter to send the grayscale values to my Amiga 500 via the parallel port. My problem is this: I hook the interface up and even though the pins on the interface connector vary from high to low, I only get a value of 255 from memory location $bfe101 (Parallel port). The weird thing is when I first hooked the project up several years ago the values changed like they're supposed to. I've checked the connector with a scope, and no pins are left hanging. I took apart my perfect sound and checkd some of the pins like STROBE and RESET to see what they were set at. Perfect sound works like the board should. Funny thing STROBE (active low) was at +5V and several other oddities like Paper Out were also high. I thought I'd wire STROBE and the others to +5 from the power supply that powers my interface board, just like PSound but BAD MOVE!!!! I fried my 8520's (At least one). I don't understand why exacly, and I was wondering if anyone could tell me what I'm doing wrong. I haven't modified anything on the interface board between the times it was working and now. I don't understand how it could just stop working. It's as if the Amiga doesn't recognize that it's there. Comments, suggestions, HELP send them all to: ******************************************************************************** * syoder@en.ecn.purdue.edu Scott A. Yoder * ********************************************************************************