Gregory's Serverok it's got this weird state machine which, as it turns out, is used to *clock out a drive type value* using the drive select line as a clock and the ready pin as a data output!
|
63 comments
  @tubetime you're incredibly good at this I could probably do this, but nowhere near as quickly @whitequark thanks! i got a lot of practice with the Quadlink project which had ~10 GALs, some registered.  @tubetime How can I make galette less awful? It's currently extremely galasm-like, but if there are things I can do to make it nicer to use, I'm all ears. (The deficiencies are probably obvious, but I'm too used to galasm to notice.) @sgf ah thanks, I really appreciate your openness! I guess there are a couple of things: - better error messages. I had some underscores in term names and the error I got said "invalid character in line n" but didn't say what the invalid character actually was. - better docs. it's always a pain to write this stuff but it's super helpful for folks. - equation reduction is probably out of scope since palasm was meant to be a thin wrapper around the raw fuse map, but that would be cool. 😃 @tubetime I worked on some error messages last week, for unrelated reasons - PTAL at Github latest & I'll fix anything missing. Docs: I love writing docs, but don't know what people need, so let me know. Equation reduction is tempting. I was thinking of writing something like a cupl2pld stage so that the pld format remains WYSIWYG. It's lower priority than just making it more usable in its basic form, though. Thanks for the feedback. If GitHub issues work better for you, that's also good. first attempt at PAL equations in galette--umm--did not match the real thing at all. i'm swapping parts into the DuPAL to compare how they perform for the same inputs. UNFORTUNATELY i've discovered that DuPAL cannot differentiate between a tri-stated output and a low output, even though the hardware is capable of doing that. 😩  bam! that was amazingly fast. so it turns out the output pin here, O13, used to drive the READY pin, goes hi-z when the drive select line is high. this is as expected. interestingly, it's driven either high or low when the drive select is low and the PAL is clocking out the drive ID code (1010... meaning it is a high density drive).    @tubetime Okay, now melt them https://github.com/mitxela/kicad-round-tracks @tubetime As "fartkontrol" is Danish, not German it's "den fartkontrol".   @tubetime That's totally readable and, apart from the all-uppercase, looks pretty nice. It's been a long time since I've seen /, *, and + used rather than !, &, and | but it's charming.  @tubetime @tubetime I'm sorry to @ you like this, and I'm sorry if I already did and forgot, but I have some DEC 3100s and Sun 3/60s, and I'm terrible with electronics. I keep trying to do minor repairs or kits and I just ruin things. I'd really especially like to get PLAs from those dumped if possible since that's kind of a ticking timebomb. Do you know of anyone who does stuff like that for randos like me? And regardless, thank you for sharing the hacking that you do do. |
@tubetime i like the handwriting. 😊