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AppleWin/source/Z80VICE/z80mem.cpp

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/*
* z80mem.c
*
* Written by
* Andreas Boose <viceteam@t-online.de>
*
* This file is part of VICE, the Versatile Commodore Emulator.
* See README for copyright notice.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
* 02111-1307 USA.
*
*/
//#include "vice.h"
#include "StdAfx.h"
//#include "c128mem.h" // [AppleWin-TC]
//#include "c128mmu.h"
//#include "c64cia.h"
//#include "c64io.h"
//#include "cmdline.h"
//#include "log.h"
//#include "mem.h"
//#include "resources.h"
//#include "sid.h"
//#include "sysfile.h"
//#include "types.h"
//#include "vdc-mem.h"
//#include "vdc.h"
//#include "vicii-mem.h"
//#include "vicii.h"
#include "../CommonVICE/types.h" // [AppleWin-TC]
#include "z80mem.h"
#include "z80.h" // [AppleWin-TC] Added for z80_RDMEM() & z80_WRMEM
/* Z80 boot BIOS. */
BYTE z80bios_rom[0x1000];
/* Logging. */
//static log_t z80mem_log = LOG_ERR; // [AppleWin-TC]
/* Adjust this pointer when the MMU changes banks. */
static BYTE **bank_base;
static int *bank_limit = NULL;
unsigned int z80_old_reg_pc;
/* Pointers to the currently used memory read and write tables. */
read_func_ptr_t *_z80mem_read_tab_ptr;
store_func_ptr_t *_z80mem_write_tab_ptr;
BYTE **_z80mem_read_base_tab_ptr;
int *z80mem_read_limit_tab_ptr;
#define NUM_CONFIGS 8
/* Memory read and write tables. */
static store_func_ptr_t mem_write_tab[NUM_CONFIGS][0x101];
static read_func_ptr_t mem_read_tab[NUM_CONFIGS][0x101];
static BYTE *mem_read_base_tab[NUM_CONFIGS][0x101];
static int mem_read_limit_tab[NUM_CONFIGS][0x101];
store_func_ptr_t io_write_tab[0x101];
read_func_ptr_t io_read_tab[0x101];
//static const resource_int_t resources_int[] = { // [AppleWin-TC]
// { NULL }
//};
//
//int z80mem_resources_init(void)
//{
// return resources_register_int(resources_int);
//}
//
//static const cmdline_option_t cmdline_options[] =
//{
// { NULL }
//};
//
//int z80mem_cmdline_options_init(void)
//{
// return cmdline_register_options(cmdline_options);
//}
/* ------------------------------------------------------------------------- */
/* Generic memory access. */
#if 0
static void REGPARM2 z80mem_store(WORD addr, BYTE value)
{
_z80mem_write_tab_ptr[addr >> 8](addr, value);
}
static BYTE REGPARM1 z80mem_read(WORD addr)
{
return _z80mem_read_tab_ptr[addr >> 8](addr);
}
#endif
BYTE REGPARM1 bios_read(WORD addr)
{
return z80bios_rom[addr & 0x0fff];
}
void REGPARM2 bios_store(WORD addr, BYTE value)
{
z80bios_rom[addr] = value;
}
//static BYTE REGPARM1 z80_read_zero(WORD addr) // [AppleWin-TC]
//{
// return mem_page_zero[addr];
//}
//
//static void REGPARM2 z80_store_zero(WORD addr, BYTE value)
//{
// mem_page_zero[addr] = value;
//}
static BYTE REGPARM1 read_unconnected_io(WORD addr)
{
// log_message(z80mem_log, "Read from unconnected IO %04x", addr); // [AppleWin-TC]
return 0;
}
static void REGPARM2 store_unconnected_io(WORD addr, BYTE value)
{
// log_message(z80mem_log, "Store to unconnected IO %04x %02x", addr, value); // [AppleWin-TC]
}
void z80mem_initialize(void)
{
int i, j;
/* Memory addess space. */
for (j = 0; j < NUM_CONFIGS; j++) {
for (i = 0; i <= 0x100; i++) {
mem_read_base_tab[j][i] = NULL;
mem_read_limit_tab[j][i] = -1;
mem_read_tab[j][i] = z80_RDMEM; // [AppleWin-TC]
mem_write_tab[j][i] = z80_WRMEM; // [AppleWin-TC]
}
}
_z80mem_read_tab_ptr = mem_read_tab[0];
_z80mem_write_tab_ptr = mem_write_tab[0];
_z80mem_read_base_tab_ptr = mem_read_base_tab[0];
z80mem_read_limit_tab_ptr = mem_read_limit_tab[0];
/* IO address space. */
/* At least we know what happens. */
for (i = 0; i <= 0x100; i++) {
io_read_tab[i] = read_unconnected_io;
io_write_tab[i] = store_unconnected_io;
}
#if 0 // [AppleWin-TC]
int i, j;
/* Memory addess space. */
for (j = 0; j < NUM_CONFIGS; j++) {
for (i = 0; i <= 0x100; i++) {
mem_read_base_tab[j][i] = NULL;
mem_read_limit_tab[j][i] = -1;
}
}
mem_read_tab[0][0] = bios_read;
mem_write_tab[0][0] = z80_store_zero;
mem_read_tab[1][0] = bios_read;
mem_write_tab[1][0] = z80_store_zero;
mem_read_tab[2][0] = z80_read_zero;
mem_write_tab[2][0] = z80_store_zero;
mem_read_tab[3][0] = z80_read_zero;
mem_write_tab[3][0] = z80_store_zero;
mem_read_tab[4][0] = z80_read_zero;
mem_write_tab[4][0] = z80_store_zero;
mem_read_tab[5][0] = z80_read_zero;
mem_write_tab[5][0] = z80_store_zero;
mem_read_tab[6][0] = z80_read_zero;
mem_write_tab[6][0] = z80_store_zero;
mem_read_tab[7][0] = z80_read_zero;
mem_write_tab[7][0] = z80_store_zero;
mem_read_tab[0][1] = bios_read;
mem_write_tab[0][1] = one_store;
mem_read_tab[1][1] = bios_read;
mem_write_tab[1][1] = one_store;
mem_read_tab[2][1] = one_read;
mem_write_tab[2][1] = one_store;
mem_read_tab[3][1] = one_read;
mem_write_tab[3][1] = one_store;
mem_read_tab[4][1] = one_read;
mem_write_tab[4][1] = one_store;
mem_read_tab[5][1] = one_read;
mem_write_tab[5][1] = one_store;
mem_read_tab[6][1] = one_read;
mem_write_tab[6][1] = one_store;
mem_read_tab[7][1] = one_read;
mem_write_tab[7][1] = one_store;
for (i = 2; i < 0x10; i++) {
mem_read_tab[0][i] = bios_read;
mem_write_tab[0][i] = ram_store;
mem_read_tab[1][i] = bios_read;
mem_write_tab[1][i] = ram_store;
mem_read_tab[2][i] = lo_read;
mem_write_tab[2][i] = lo_store;
mem_read_tab[3][i] = lo_read;
mem_write_tab[3][i] = lo_store;
mem_read_tab[4][i] = ram_read;
mem_write_tab[4][i] = ram_store;
mem_read_tab[5][i] = ram_read;
mem_write_tab[5][i] = ram_store;
mem_read_tab[6][i] = lo_read;
mem_write_tab[6][i] = lo_store;
mem_read_tab[7][i] = lo_read;
mem_write_tab[7][i] = lo_store;
}
for (i = 0x10; i <= 0x13; i++) {
mem_read_tab[0][i] = ram_read;
mem_write_tab[0][i] = ram_store;
mem_read_tab[1][i] = colorram_read;
mem_write_tab[1][i] = colorram_store;
mem_read_tab[2][i] = lo_read;
mem_write_tab[2][i] = lo_store;
mem_read_tab[3][i] = colorram_read;
mem_write_tab[3][i] = colorram_store;
mem_read_tab[4][i] = ram_read;
mem_write_tab[4][i] = ram_store;
mem_read_tab[5][i] = colorram_read;
mem_write_tab[5][i] = colorram_store;
mem_read_tab[6][i] = lo_read;
mem_write_tab[6][i] = lo_store;
mem_read_tab[7][i] = colorram_read;
mem_write_tab[7][i] = colorram_store;
}
for (i = 0x14; i <= 0x3f; i++) {
mem_read_tab[0][i] = ram_read;
mem_write_tab[0][i] = ram_store;
mem_read_tab[1][i] = ram_read;
mem_write_tab[1][i] = ram_store;
mem_read_tab[2][i] = lo_read;
mem_write_tab[2][i] = lo_store;
mem_read_tab[3][i] = lo_read;
mem_write_tab[3][i] = lo_store;
mem_read_tab[4][i] = ram_read;
mem_write_tab[4][i] = ram_store;
mem_read_tab[5][i] = ram_read;
mem_write_tab[5][i] = ram_store;
mem_read_tab[6][i] = lo_read;
mem_write_tab[6][i] = lo_store;
mem_read_tab[7][i] = lo_read;
mem_write_tab[7][i] = lo_store;
}
for (j = 0; j < NUM_CONFIGS; j++) {
for (i = 0x40; i <= 0xbf; i++) {
mem_read_tab[j][i] = ram_read;
mem_write_tab[j][i] = ram_store;
}
}
for (i = 0xc0; i <= 0xcf; i++) {
mem_read_tab[0][i] = ram_read;
mem_write_tab[0][i] = ram_store;
mem_read_tab[1][i] = ram_read;
mem_write_tab[1][i] = ram_store;
mem_read_tab[2][i] = top_shared_read;
mem_write_tab[2][i] = top_shared_store;
mem_read_tab[3][i] = top_shared_read;
mem_write_tab[3][i] = top_shared_store;
mem_read_tab[4][i] = ram_read;
mem_write_tab[4][i] = ram_store;
mem_read_tab[5][i] = ram_read;
mem_write_tab[5][i] = ram_store;
mem_read_tab[6][i] = top_shared_read;
mem_write_tab[6][i] = top_shared_store;
mem_read_tab[7][i] = top_shared_read;
mem_write_tab[7][i] = top_shared_store;
}
for (i = 0xd0; i <= 0xdf; i++) {
mem_read_tab[0][i] = ram_read;
mem_write_tab[0][i] = ram_store;
mem_read_tab[1][i] = ram_read;
mem_write_tab[1][i] = ram_store;
mem_read_tab[2][i] = top_shared_read;
mem_write_tab[2][i] = top_shared_store;
mem_read_tab[3][i] = top_shared_read;
mem_write_tab[3][i] = top_shared_store;
mem_read_tab[4][i] = ram_read;
mem_write_tab[4][i] = ram_store;
mem_read_tab[5][i] = ram_read;
mem_write_tab[5][i] = ram_store;
mem_read_tab[6][i] = top_shared_read;
mem_write_tab[6][i] = top_shared_store;
mem_read_tab[7][i] = top_shared_read;
mem_write_tab[7][i] = top_shared_store;
}
for (i = 0xe0; i <= 0xfe; i++) {
mem_read_tab[0][i] = ram_read;
mem_write_tab[0][i] = ram_store;
mem_read_tab[1][i] = ram_read;
mem_write_tab[1][i] = ram_store;
mem_read_tab[2][i] = top_shared_read;
mem_write_tab[2][i] = top_shared_store;
mem_read_tab[3][i] = top_shared_read;
mem_write_tab[3][i] = top_shared_store;
mem_read_tab[4][i] = ram_read;
mem_write_tab[4][i] = ram_store;
mem_read_tab[5][i] = ram_read;
mem_write_tab[5][i] = ram_store;
mem_read_tab[6][i] = top_shared_read;
mem_write_tab[6][i] = top_shared_store;
mem_read_tab[7][i] = top_shared_read;
mem_write_tab[7][i] = top_shared_store;
}
for (j = 0; j < NUM_CONFIGS; j++) {
mem_read_tab[j][0xff] = mmu_ffxx_read_z80;
mem_write_tab[j][0xff] = mmu_ffxx_store;
mem_read_tab[j][0x100] = mem_read_tab[j][0x0];
mem_write_tab[j][0x100] = mem_write_tab[j][0x0];
}
_z80mem_read_tab_ptr = mem_read_tab[0];
_z80mem_write_tab_ptr = mem_write_tab[0];
_z80mem_read_base_tab_ptr = mem_read_base_tab[0];
z80mem_read_limit_tab_ptr = mem_read_limit_tab[0];
/* IO address space. */
/* At least we know what happens. */
for (i = 0; i <= 0x100; i++) {
io_read_tab[i] = read_unconnected_io;
io_write_tab[i] = store_unconnected_io;
}
/*
io_read_tab[0x10] = colorram_read;
io_write_tab[0x10] = colorram_store;
io_read_tab[0x11] = colorram_read;
io_write_tab[0x11] = colorram_store;
io_read_tab[0x12] = colorram_read;
io_write_tab[0x12] = colorram_store;
io_read_tab[0x13] = colorram_read;
io_write_tab[0x13] = colorram_store;
*/
io_read_tab[0xd0] = vicii_read;
io_write_tab[0xd0] = vicii_store;
io_read_tab[0xd1] = vicii_read;
io_write_tab[0xd1] = vicii_store;
io_read_tab[0xd2] = vicii_read;
io_write_tab[0xd2] = vicii_store;
io_read_tab[0xd3] = vicii_read;
io_write_tab[0xd3] = vicii_store;
io_read_tab[0xd4] = sid_read;
io_write_tab[0xd4] = sid_store;
io_read_tab[0xd5] = mmu_read;
io_write_tab[0xd5] = mmu_store;
io_read_tab[0xd6] = vdc_read;
io_write_tab[0xd6] = vdc_store;
io_read_tab[0xd7] = d7xx_read;
io_write_tab[0xd7] = d7xx_store;
io_read_tab[0xd8] = colorram_read;
io_write_tab[0xd8] = colorram_store;
io_read_tab[0xd9] = colorram_read;
io_write_tab[0xd9] = colorram_store;
io_read_tab[0xda] = colorram_read;
io_write_tab[0xda] = colorram_store;
io_read_tab[0xdb] = colorram_read;
io_write_tab[0xdb] = colorram_store;
io_read_tab[0xdc] = cia1_read;
io_write_tab[0xdc] = cia1_store;
io_read_tab[0xdd] = cia2_read;
io_write_tab[0xdd] = cia2_store;
io_read_tab[0xde] = c64io1_read;
io_write_tab[0xde] = c64io1_store;
io_read_tab[0xdf] = c64io2_read;
io_write_tab[0xdf] = c64io2_store;
#endif
}
void z80mem_set_bank_pointer(BYTE **base, int *limit)
{
bank_base = base;
bank_limit = limit;
}
void z80mem_update_config(int config)
{
_z80mem_read_tab_ptr = mem_read_tab[config];
_z80mem_write_tab_ptr = mem_write_tab[config];
_z80mem_read_base_tab_ptr = mem_read_base_tab[config];
z80mem_read_limit_tab_ptr = mem_read_limit_tab[config];
/*
if (bank_limit != NULL) {
*bank_base = _z80mem_read_base_tab_ptr[z80_old_reg_pc >> 8];
if (*bank_base != 0)
*bank_base = _z80mem_read_base_tab_ptr[z80_old_reg_pc >> 8]
- (z80_old_reg_pc & 0xff00);
*bank_limit = z80mem_read_limit_tab_ptr[z80_old_reg_pc >> 8];
}
*/
}
int z80mem_load(void)
{
// if (z80mem_log == LOG_ERR) // [AppleWin-TC]
// z80mem_log = log_open("Z80MEM");
z80mem_initialize();
return 0;
}
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