mirrorbird(00:24:33)
Age, an interesting thing about the speccy is that one of the later models lets you page over the ROM. i've seen a quite nice Pac-Man implementation done that way. (and they used it for CP/M i think). the earlier 128K models are extremely similar but ROM
Agemixer(00:24:07)
so, stack can be used as FILO buffer (for complex maths or sth)
Agemixer(00:21:45)
so basically zeropage gains you faster memory access for 256 bytes (located 0..255) and stack another 256 (256..511) in a memory
Agemixer(00:20:05)
PHA to push accu, PLA to pull (for stack) but it is not all efficient by cycles, but makes program smaller instead, up to 66% smaller for these commands