# 6502 emulator

The 6502 emulator lives at emul/6502.fs and interprets 6502 native code. It
exposes itself through the a struct which extends the CPU struct [emul/cpu]
and holds register values.

For running an emulated Collapse OS under 6502, see [emul/cos].

## API

Fields:

A X Y S P
  8-bit fields corresponding to the register of the same name

PC
  16-bit field corresponding to the register of the same name

Values (not tied to the struct, but inside namespace):

verbose
  If nonzero, will call .cpu at each instruction it runs.

Words:

exec(
  mem( + $200, where execution begins.

)mem
  mem( + $10000, where emulated memory ends

reset ( cpu -- )
  Set P to 0 and PC to $200.

new6502 ( mem( -- cpu )
  Create a new 6502 CPU struct with its memory beginning at address "mem(".
  Memory is *not* allocated.