-- Sent from mobile phone (so please have understanding). On 8 wrz 2013, at 21:44, Justin <shadow@darksideresearch.com> wrote: > Is there a trick for figuring out which pin is which on a serial port that can be executed with a multimeter and an ancient no-logging Heathkit oscilloscope? If this is your only testing equipment then it may be in fact tricky.. First, have you checked the levels? Is it really an RS232 with its notorious logic levels? Or something else? This you should be able to check with your scope. Next I'd of course connect a logic analyser with or w/o level converters, depending on the outcome of the previous test. But since I understand that you have none, the "get one" suggestion is quite appropriate IMHO :-) How about looking closer at the hardware itself then? I still remember very well the lesson Ruud once gave me by deducting virtually everything (including error in the silkscreen!) about an unknown to him piece of hardware by merely looking at an (unpopulated!!) PCB of some seven ICs of various sizes. After this experience I know that a lot of information can be gained this way. At least you should be able to eliminate some pins from the equations. -- SD! Message was sent through the cbm-hackers mailing listReceived on 2013-09-09 03:00:13
Archive generated by hypermail 2.2.0.