On Tue, Oct 3, 2017 at 7:00 PM, Francesco Messineo <francesco.messineo@gmail.com> wrote: > On Mon, Oct 2, 2017 at 9:41 AM, Francesco Messineo > <francesco.messineo@gmail.com> wrote: >> On Fri, Sep 29, 2017 at 10:20 AM, Francesco Messineo >> <francesco.messineo@gmail.com> wrote: >>> On Fri, Sep 29, 2017 at 7:55 AM, Francesco Messineo >>> <francesco.messineo@gmail.com> wrote: >>>> On Fri, Sep 29, 2017 at 7:05 AM, William Levak <wlevak@sdf.org> wrote: >>>>> On Thu, 28 Sep 2017, Francesco Messineo wrote: >>>>> >>>>>> On Thu, Sep 28, 2017 at 12:48 PM, Francesco Messineo >>>>>> <francesco.messineo@gmail.com> wrote: >>>>>> >>>>>>> >>>> >>>>>> >> >>> update: changing the UD8 socket, did bring the system to the basic >>> prompt, with correct bytes free count. >>> I then restored the two CAS resistors (I had lifted them to swap RAM >>> banks) and now I have a completely black screen, not even the garbage >>> screen if I remove the UD9 ROM :( >>> Looks like I now have to debug the video signal path. This PET hates me I guess. Success, so far :) Look like it was quite a broad fault (probably originated from a single shorted input): UG3 bad UF4 bad UF5 bad UH5 bad (shorted input on pin4) <-- this was probably the start of the multiple fault In the process I have suspected also UF2 (socketed, but good). All in all, I'm happy I didn't socket too many good ICs. Frank IZ8DWF Message was sent through the cbm-hackers mailing listReceived on 2017-10-04 11:00:02
Archive generated by hypermail 2.2.0.