From: Michael Huth (enigma_at_mail.lipsia.de)
Date: 2008-06-28 15:01:47
Hello, I just would like to note that some more chips arrived here. So all in all there are images now of: Chips from Stephan Lesch: 6569R1 2783 (ceramic package) 6569R3 ???? (ceramic package) Chip from Tommi Lempinen aka ZrX-OmS 6581R3 ???? (plastic package) Chips from Jarkko Lehti, aka Grue / Beyond Force (all plastic package) sid_mos6581r4ar_3488 sid_csg6581r4ar_3789 - no image, obviously identical die as mos6581r4ar sid_mos8580r5_0288 sid_csg8580r5_0591 - no image, obviously identical die as mos8580r5 I stitched all dies already together, due to my small bandwidth at home, my page will be updated step by step within the next days. I would also like to mention Tommis work on revectorization of sid circuits with some very noticable results: f.e. http://oms.wmhost.com/misc/r3_filter.gif more at http://oms.wmhost.com/misc Also interesting: Comparison of R3 and R4 structure show no real difference, so the guess is that the material changed. The different color of the oxide layer of the R4 could be an indication for this as the light of the microscope is calibrated to 3200K. Also the R3s oxide layer show more surface defects (small black spots) whereas the R4s is more smooth. I will check if there might be some way to do spectroscopic work in the micrometer range on this. Indications of thickness differences could be done by comparing the edge sizes in the darkfield mode, but my current guess is that thickness is identical. The original recorded images will be upped too, so if someone thinks he is a real stiching expert... :-) If you would like to have the classic metallic look of the dies, just auto level and auto color the images. Ciao... ...Michael P.S.: Wasn't there some unsolved question why VSP works on some VIC2s and on some not? Message was sent through the cbm-hackers mailing list
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