2023-04-08 04:13:54 <veltas      > You can watch a recording of me writing a simple utility in Forth if you're interested https://www.youtube.com/watch?v=eEqgZp-VSgs
2023-04-08 07:50:06 <veltas      > KipIngram: Looks like the issue isn't lack of precision, the algorithm accounted for 16-bit cells
2023-04-08 07:50:49 <veltas      > The issue is that my M*/ (specifically UM*/ which is my CODE word for doing the heavy lifting) ignores the high byte of the denominator
2023-04-08 07:51:48 <veltas      > Which I think I can fix, will look at after walking dogs. It's amazing really that an 8-bit machine has enough space to do a 48-bit by 16-bit division, all in registers, if I manage to do this
2023-04-08 07:53:34 <veltas      > The function in assembly, with guilty FIXME https://github.com/Veltas/zenv/blob/master/src/zenv.asm#L1062
2023-04-08 07:54:13 <veltas      > The plan is to put something in IX, which seems to be unused so far
2023-04-08 07:54:40 <veltas      > (it's the return stack pointer, but I can just save/restore that on param stack)
2023-04-08 16:38:14 <veltas      > I've fixed M*/ and now the algorithm actually seem to be overflowing the denominator, as I feared it might
2023-04-08 16:58:17 <veltas      > I ended up delving into shadow registers to do it though https://github.com/Veltas/zenv/commit/85fd85a78fff6027a2a6412285895e3a8239d19c
2023-04-08 17:00:35 <veltas      > I love that algorithm for division, it keeps both the remaining numerator bits and the incoming quotient bits in the same 'register'
2023-04-08 17:00:49 <veltas      > I don't know if it has a name, and no I didn't come up with it independently
2023-04-08 17:45:17 <KipIngram   > I'm going to have to look that over well - it sounds fascinating.
2023-04-08 17:45:32 <KipIngram   > I love "clever algorithms."
2023-04-08 17:47:44 <veltas      > It's not clever in a computer science sense, just clever in optimisation
2023-04-08 18:45:55 <thrig       > up until the software can operate doorknobs to get at you
2023-04-08 19:07:35 <Zarutian_iPad> thrig: a roboraptor scenario?
2023-04-08 19:21:37 <thrig       > with lasers!