122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
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/* FCEUmm - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2023-2024 negativeExponent
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* Copyright (C) 2025 NewRisingSun
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "mapinc.h"
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#include "pic16c5x.h"
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static uint32 address;
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static uint8 *picrom = NULL;
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static uint8_t pci16c5x_read(int port) {
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if (port == 0) {
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return (1 |
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(address & 0x0040 ? 0x02 : 0) | /* A6 -> RA1 */
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(address & 0x0020 ? 0x04 : 0) | /* A5 -> RA2 */
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(address & 0x0010 ? 0x08 : 0)); /* A4 -> RA3 */
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} else if (port == 1) {
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return (
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(address & 0x1000 ? 0x01 : 0) | /* A12 -> RB0 */
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(address & 0x0080 ? 0x02 : 0) | /* A7 -> RB1 */
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(address & 0x0400 ? 0x04 : 0) | /* A10 -> RB2 */
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(address & 0x0800 ? 0x08 : 0) | /* A11 -> RB3 */
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(address & 0x0200 ? 0x10 : 0) | /* A9 -> RB4 */
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(address & 0x0100 ? 0x20 : 0) | /* A8 -> RB5 */
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(address & 0x2000 ? 0x40 : 0) | /* A13 -> RB6 */
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(address & 0x4000 ? 0x80 : 0)); /* A14 -> RB7 */
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}
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return (0xFF);
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}
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static void pci16c5x_write(int port, int val) {
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if (port == 0) {
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if (val & 0x1001) {
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X6502_IRQEnd(FCEU_IQEXT);
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} else {
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X6502_IRQBegin(FCEU_IQEXT);
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}
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}
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}
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static void M355CPUIRQHook(int a) {
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while (a--) {
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pic16c5x_run();
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}
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}
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static readfunc cpuRead[0x10000];
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static writefunc cpuWrite[0x10000];
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static DECLFR(M355Read) {
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address = A;
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if (A >= 0x8000) {
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return CartBR(A);
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}
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return cpuRead[A](A);
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}
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static DECLFW(M355Write) {
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address = A;
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if (cpuWrite[A]) {
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cpuWrite[A](A, V);
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}
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}
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static void M355Power(void) {
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int x;
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address = 0;
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pic16c5x_reset(1);
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setprg32(0x8000, 0);
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setchr8(0);
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for (x = 0; x < 0x10000; x++) {
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cpuRead[x] = GetReadHandler(x);
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cpuWrite[x] = GetWriteHandler(x);
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}
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SetReadHandler(0, 0xFFFF, M355Read);
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SetWriteHandler(0, 0xFFFF, M355Write);
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}
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static void M355Reset(void) {
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address = 0;
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pic16c5x_reset(0);
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}
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static void M355Close(void) {
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picrom = NULL;
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}
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void UNL3DBlock_Init(CartInfo *info) {
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if (MiscROM && info->miscROMSize) picrom = MiscROM;
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if (picrom) {
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pic16c54_init(picrom, pci16c5x_read, pci16c5x_write);
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pic16c5x_add_statesinfo();
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}
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info->Power = M355Power;
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info->Reset = M355Reset;
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info->Close = M355Close;
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MapIRQHook = M355CPUIRQHook;
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AddExState(&address, sizeof(address), 0, "ADDR");
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}
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