From: Baltissen, GJPAA (Ruud) (ruud.baltissen_at_abp.nl)
Date: 2003-10-31 08:50:36
Hallo allemaal, > > - Dela IC tester. This device is produced in Germany. Thanks to Max Clemens: http://www.cascade64.de/pagez/drivers5.html > mmmh... i vaguely remember some software from the "64er" > magazine that (together with some hardware ofcourse) allowed > to "test" ICs in the sence of finding out how they actually > function..... ie, grab some glue logic IC, put > it in there, and the software will tell you "this is a 7400". I have played with this idea as well. But how? First you have to find out which pin is an input, which one is an output. The safest way IMHO is to use resistors. You connect a pin to GND through a 2K2 resistor. Is it a input, the voltage at the pin is near 0 Volt. Is it an output, the readings will be much higher. And now try to translate this idea to a working design. It is doable but a hell of a job. And not worth the trouble IMHO. I first figure out the type of pin by looking at the original board it self. Let's take a C64 cartridge for example. You know every pin of the connector. So if a addressline is connected to a pin of such an erased IC, you can bet it is an input. (Exceptions are the REU, SuperCPU etc.) In the same way you can deduct that a pin connected to GAME or EXROM must be an output. Having figured out the type of most pins, it is time to remove it from the board and put it in a breadboard. Then start playing around with connecting 0V or 5V to the inputs and seeing what the outputs do. Nicer would be placing it in an IC-tester and telling it the type of the pins and then let him do the job by comparing it with a build-in database. -- ___ / __|__ / / |_/ Groetjes, Ruud \ \__|_\ \___| http://Ruud.C64.org =====DISCLAIMER================================================================= De informatie in dit e-mailbericht is vertrouwelijk en uitsluitend bestemd voor de geadresseerde. Wanneer u dit bericht per abuis ontvangt, verzoeken wij u contact op te nemen met de afzender per kerende e-mail. Verder verzoeken wij u in dat geval dit e-mailbericht te vernietigen en de inhoud ervan aan niemand openbaar te maken. Wij aanvaarden geen aansprakelijkheid voor onjuiste, onvolledige dan wel ontijdige overbrenging van de inhoud van een verzonden e-mailbericht, noch voor daarbij overgebrachte virussen. The information contained in this e-mail is confidential and may be privileged. It may be read, copied and used only by the intended recipient. If you have received it in error, please contact the sender immediately by return e-mail; please delete in this case the e-mail and do not disclose its contents to any person. We don't accept liability for any errors, omissions, delays of receipt or viruses in the contents of this message which arise as a result of e-mail transmission. Message was sent through the cbm-hackers mailing list
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