#ifndef MEMMAP_H
#define MEMMAP_H

#include "types.h"

// MMAP_ROM        : BASIC + I/O  + KERNAL -> default power on config
// MMAP_NO_BASIC   :         I/O  + KERNAL -> easy extra chunk of contiguous RAM
// MMAP_NO_ROM     :         I/O           -> I/O and COLOR RAM in $d000-$dfff block, rest is RAM
// MMAP_RAM        :                       -> ALL RAM, you'll need to manage some state switching...
// MMAP_CHAR_ROM   :         CHAR          -> no BASIC or KERNAL or I/O, but can copy CHAR ROM
// MMAP_ALL_ROM    : BASIC + CHAR + KERNAL -> All ROM functions available, but no I/O

#define MMAP_ROM        0x37
#define MMAP_NO_BASIC   0x36
#define MMAP_NO_ROM     0x35
#define MMAP_RAM        0x30
#define MMAP_CHAR_ROM   0x31
#define MMAP_ALL_ROM    0x33

// Install an IRQ an NMI trampoline, that routes the kernal interrupts
// through an intermediate trampoline when the kernal ROM is not paged
// in.  The trampoline enables the ROM, executes the interrupt and
// restores the memory map setting before returning.

void mmap_trampoline(void);

// Set the memory map in a way that is compatible with the IRQ
// trampoline, returns the previous state

inline char mmap_set(char pla);

#pragma compile("memmap.c")

#endif