[gergoerdi]

From what I understand, LLVM-MOS treats large parts of the zero page as virtual ("imaginary") registers, so you have no shortage of that (https://llvm-mos.org/wiki/Imaginary_registers). Then, sufficiently advanced compiler technology improves the stack situation (https://llvm-mos.org/wiki/C_calling_convention).

[dhosek]

6502 assembly has the distinct advantage of having special page-0 instructions for reading/writing from memory, including, if I recall correctly, the ability to take a 2-byte sequence and treat it as a 16-bit value (or was that in the AppleSoft ROM?)

[retrac]

The main way to do pointer indirection (without self-modifying code) is to use the zeropage-specific indirect addressing modes, which use a 2-byte address stored in zero page as a pointer to a byte in memory. (And on the original 6502, the only available addressing modes for this forced you to use the X or Y register as an index, so you had to set it to 0 first!)

[royjacobs]

You can treat 2 bytes (not just in the zero page, though) as indirect jump addresses, yes.

Doing something like "JMP ($2345)" will jump to whatever $2345/$2346 is pointing to.