Post #1888665

Good day to you! It is the first day of May here in Copenhagen, it is Friday, and it is hot like summer. This means, it is a good day for #nakeddiefriday so without further ado, here it is. This is one Zilog Z765APS, a floppy disk controller chip of 1984 vintage made in NMOS. This one is very similar to NEC uPD765A; I am not sure if Zilog licensed the maskwork. What I find particularly interesting about this one is a relatively huge microcode ROM on the left side of the die. Wouldn't it be interesting to learn what they needed so much code for? Let's experiment a bit: how about you guys scroll around the die and post the snippets you found most interesting in the comments below? We can discuss later. Full-res map for an in-depth look: http://infosecdj.net/map/zilog/z765aps/infosecdj_mz_nikpa40x_50p/ #electronics #retrocomputing #reverseengineering #microscopy