6502 assembly question

[xxphillips]

Hi everyone does anyone know how to load the B Accumulator in 6502?

In 65816 assembly I would just load REP C2 20 then load 1234 the twelve side is what I want to know how to load in assembly

00001c2
0000220
00003a9
0000434
0000512 <---

please help if you can

[rimsky82]

I'm no authority, but I'm not aware of a B accumulator, at least not in the NES variant (65C02?).

[Pugsy]

The 6502 is 8-bit so you cannot load a 16-bit direct value such as #1234 into the 8-bit accumulator, it depends on what you are trying to do on what method you use. Normal practice is to use two of the A/X/Y registers or you could use the accumulator and PHA and PLA to push each 8 bit value to and from the stack.

[xxphillips]

Thanks for your replies I'll look at Super Mario 1 asm to see how it loads bigger values then 255 for the score.

take care