Glenn Jones wrote:
Michael J. Mahon wrote:Glenn Jones wrote:pilgrimer@gmail.com wrote:http://www.syndicomm.com/~pilgrimer/nfh/ramstak.sit I found that lurcking on the Vulcan of a GS I have -Bart Keeper of the Network From HeckHi Bart, Thanks for the software.The Card I have seems to be somewhat flakey as I get errors on booting GS/OS some times.I have reseated all the RAM once which seemed to work for a day or soI then replaced all the RAM with RAM from a 1 MB apple RAM card which also seemed to work for a while.My conclusion is that one of the soldered on memory or support chips is marginal ..Anybody have a circuit for a dram chip tester?Rich is right--the parameters you really care about will only be tested by extended running of a IIgs memory test, not by any tester. I would also suspect cracked solder joints or a microscopic crack in a copper trace. If you can arrange to heat and cool parts of the board locally (hair dryer and cooling spray) you may find the area causing trouble. Applying pressure with a plastic rod can also help. All these tests need to be done _while_ a memory test is running.
I want to test individual chips to determine the bad one(s). For this card and other memory chips as well.
Any good RAM test will isolate errors to a single chip (or chips). Are there no good RAM tests for the IIgs? -michael 8-voice music synthesizer using NadaNet networking! Home page: http://members.aol.com/MJMahon/