mapper.h

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// Copyright 2023 LLVM-MOS Project
// Licensed under the Apache License, Version 2.0 with LLVM Exceptions.
// See https://github.com/llvm-mos/llvm-mos-sdk/blob/main/LICENSE for license
// information.
 
#ifndef _MAPPER_H_
#define _MAPPER_H_
 
#include <ines.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
#define MAPPER_USE_1_SCREEN \
    asm(".globl __mirroring\n.globl __four_screen\n__mirroring = 0\n__four_screen = 1\n")
 
#define MAPPER_USE_4_SCREEN_NAMETABLE \
    asm(".globl __mirroring\n.globl __four_screen\n__mirroring = 1\n__four_screen = 1\n")
 
#define MAPPER_USE_SELF_FLASHABLE_BOARD \
    asm(".globl __battery\n__battery = 1\n")
 
#define PRG_BANK_MASK       0x1F
#define PRG_BANK_SHIFT      0
#define CHR_BANK_MASK       0x60
#define CHR_BANK_SHIFT      5
#define CHR_BANK(n)       ((n) << 5)
#define CHR_BANK_0        CHR_BANK(0)
#define CHR_BANK_1        CHR_BANK(1)
#define CHR_BANK_2        CHR_BANK(2)
#define CHR_BANK_3        CHR_BANK(3)
#define MIRROR_SCREEN_MASK  0x80
#define MIRROR_SCREEN_SHIFT 7
#define MIRROR_SCREEN_1     0x00
#define MIRROR_SCREEN_2     0x80
 
__attribute__((leaf)) char get_bank_state(void);
 
__attribute__((leaf)) char set_bank_state(char value);
 
__attribute__((leaf, callback(2))) void banked_call(char bank_id,
                                                    void (*method)(void));
 
__attribute__((leaf)) char get_prg_bank(void);
 
__attribute__((leaf)) char set_prg_bank(char bank_id);
 
__attribute__((leaf)) void set_chr_bank(char bank_id);
 
__attribute__((leaf)) void swap_chr_bank(char bank_id);
 
__attribute__((leaf)) void split_chr_bank(char bank_id);
 
__attribute__((leaf)) void set_mirrored_screen(char screen_id);
 
__attribute__((leaf)) void swap_mirrored_screen(char screen_id);
 
__attribute__((leaf)) void split_mirrored_screen(char screen_id);
 
#ifdef __cplusplus
}
#endif
 
#endif // _MAPPER_H_