so I just realized I did a sizable project and never posted about it publically
last year I spent a few months on and off reverse engineering Pinball Fantasies (a 1992 video game; originally for Amiga, though I was reversing the more polished DOS port) with the intent of doing a game engine recreation, and then rewrote the logic as a Rust program
@mwk Thanks for putting your notes online. There are lots of tricks here useful for my recreational programming project, Nth Pong Wars. Also a lot of overlap with miniputt golf games!
Since I’m targeting the 1982 #NabuPC, fixed point math is essential. I was going to use 16 bits with a 6 bit fraction, but on the Z80 that involves 6 slow shift instructions to get the integer portion. At least 68000 and 8086 have shift-n-times instructions (though no barrel shifter). So putting the fraction point at a byte boundary is desirable.
Wonder why they needed 10 fractional bits. Also 3 physics frames per video frame suggests a max ball speed. I was going to try dynamic physics.
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