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erc-c/include/apple2.mem.h

55 lines
1.3 KiB
C

#ifndef _APPLE2_MEM_H_
#define _APPLE2_MEM_H_
#include "apple2.h"
#include "vm_segment.h"
/*
* Given a slot number (1-7), this will return the memory page address
* for the site of the ROM that is associated for the peripheral that
* would be connected there.
*/
#define APPLE2_PERIPHERAL_SLOT(n) \
(0xC000 + (n << 8))
/*
* This is the size of any peripheral's ROM that we can hold in memory
* (which is any page from $C100 - $C700).
*/
#define APPLE2_PERIPHERAL_SIZE 0x700
/*
* Peripheral ROM can only occupy a single page in memory.
*/
#define APPLE2_PERIPHERAL_PAGE 0x100
/*
* System ROM requires a full 16k; part of it is copied into several
* pages beginning at $C800, and much more go into $D000 - $FFFF.
*/
#define APPLE2_SYSROM_SIZE 0x4000
/*
* The size of our block of ROM is 12k
*/
#define APPLE2_ROM_SIZE 0x3000
/*
* Whereas the second bank of RAM is a mere 4k
*/
#define APPLE2_RAM2_SIZE 0x1000
/*
* This is the base address (or offset) for all bank-switched memory
*/
#define APPLE2_BANK_OFFSET 0xD000
extern vm_8bit apple2_mem_read_bank(vm_segment *, size_t, void *);
extern void apple2_mem_write_bank(vm_segment *, size_t, vm_8bit, void *);
extern void apple2_mem_map(apple2 *);
extern int apple2_mem_init_peripheral_rom(apple2 *);
extern int apple2_mem_init_sys_rom(apple2 *);
#endif