Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!samsung!umich!terminator!saic.com!steveg From: steveg@com.com (Stephen Harold Goldstein) Newsgroups: comp.sys.atari.st.tech Subject: Re: Hard Drive interferring w Mono Monitor. Solution Sought Message-ID: Date: 30 Oct 90 19:14:11 GMT References: <8905@ncar.ucar.edu> <1990Oct26.104012.15218@agate.berkeley.edu> <38754@ut-emx.uucp> Sender: usenet@terminator.cc.umich.edu (usenet news) Followup-To: comp.sys.atari.st.tech Organization: Science Applications International Corporation, CSEIC Lines: 24 In-Reply-To: tdrga@walt.cc.utexas.edu's message of 26 Oct 90 19:32:17 GMT I had a similar problem with my Mega 4 and my mono monitor. Color worked fine, but accessing either of my hard drives (a Seagate 277N and a Syquest 44meg cart) with my *NEW* ICD Advantage ST (no plus) adapter would make the mono monitor APPEAR to lose both horizontal and vertical sync. I played around with the monitor adjustments and was able to stabilize vertical hold for both normal and "Weird" mode, but the horizontal display was still flaked out - seems like there were the right number of black and white dots per scan line, but they were garbled. Anyway, the nice guys at ICD suggested I check my adapter for a daughterboad with two blue capacitors underneath it. Sure enough they were there. Clipping BOTH of them off improved the situation, but not completely. Replacing the ICD (long) DMA cable with a short (Atari size) cable seems to have done the trick for me. Before you start mucking with your host adapter, try a short DMA cable as I'm not sure if removing the caps was really necessary. Steve Goldstein steveg@cseic.saic.com -- --- Stephen Goldstein steveg@saic.com My first Atari system? A 24K Atari 800, Rev. A ROMS, C(not G)TIA graphics Disclaimer: That's not what I said.