mirror of
https://github.com/MiSTer-devel/Main_MiSTer.git
synced 2026-04-12 03:04:02 +00:00
53f1ca18e8
- Send audio sectors faster so buffer stays filled - Ask FPGA if it is ready to receive a sector - Fix SCAN with CHD files - Fix missing start of audio by sending with separate index
298 lines
10 KiB
C++
298 lines
10 KiB
C++
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include "../../file_io.h"
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#include "../../user_io.h"
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#include "../../spi.h"
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#include "../../hardware.h"
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#include "../../menu.h"
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#include "../../cheats.h"
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#include "megacd.h"
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#define SAVE_IO_INDEX 5 // fake download to trigger save loading
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#define MCD_GET_CMD 0
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#define MCD_GET_SEND_DATA 1
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static int need_reset=0;
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static uint8_t has_command = 0;
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void mcd_poll()
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{
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static uint32_t poll_timer = 0;
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static uint8_t last_req = 255;
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static uint8_t adj = 0;
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if (!poll_timer || CheckTimer(poll_timer))
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{
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if (!cdd.isData && cdd.status == CD_STAT_PLAY && cdd.latency == 0) {
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// Send audio sectors faster so buffer stays filled
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poll_timer = GetTimer(10);
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adj = 0;
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} else {
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poll_timer = GetTimer(13 + (!adj ? 1 : 0));
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if (++adj >= 3) adj = 0;
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}
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if (has_command) {
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spi_uio_cmd_cont(UIO_CD_SET);
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uint64_t s = cdd.GetStatus(0);
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spi_w((s >> 0) & 0xFFFF);
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spi_w((s >> 16) & 0xFFFF);
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spi_w(((s >> 32) & 0x00FF) | (cdd.isData ? 0x01 << 8 : 0x00 << 8));
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DisableIO();
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has_command = 0;
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//printf("\x1b[32mMCD: Send status, status = %04X%04X%04X, frame = %u\n\x1b[0m", (uint16_t)((s >> 32) & 0x00FF), (uint16_t)((s >> 16) & 0xFFFF), (uint16_t)((s >> 0) & 0xFFFF), frame);
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}
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cdd.Update();
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}
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uint8_t req = spi_uio_cmd_cont(UIO_CD_GET);
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if (req != last_req)
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{
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last_req = req;
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spi_w(MCD_GET_CMD);
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uint16_t data_in[4];
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data_in[0] = spi_w(0);
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data_in[1] = spi_w(0);
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data_in[2] = spi_w(0);
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DisableIO();
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if (need_reset || data_in[0] == 0xFF) {
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printf("MCD: request to reset\n");
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need_reset = 0;
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cdd.Reset();
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}
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uint64_t c = *((uint64_t*)(data_in));
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cdd.SetCommand(c, 0);
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cdd.CommandExec();
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has_command = 1;
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//printf("\x1b[32mMCD: Get command, command = %04X%04X%04X, has_command = %u\n\x1b[0m", data_in[2], data_in[1], data_in[0], has_command);
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}
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else
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DisableIO();
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}
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static char buf[1024];
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static void mcd_mount_save(const char *filename)
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{
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user_io_set_index(SAVE_IO_INDEX);
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user_io_set_download(1);
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if (strlen(filename))
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{
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FileGenerateSavePath(filename, buf);
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user_io_file_mount(buf, 0, 1);
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}
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else
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{
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user_io_file_mount("");
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}
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user_io_set_download(0);
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}
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static int mcd_load_rom(const char *basename, const char *name, int sub_index)
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{
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strcpy(buf, basename);
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char *p = strrchr(buf, '/');
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if (p)
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{
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p++;
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strcpy(p, name);
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if (user_io_file_tx(buf, sub_index << 6)) return 1;
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}
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return 0;
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}
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void mcd_set_image(int num, const char *filename)
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{
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static char last_dir[1024] = {};
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(void)num;
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cdd.Unload();
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cdd.status = CD_STAT_OPEN;
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int same_game = *filename && *last_dir && !strncmp(last_dir, filename, strlen(last_dir));
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strcpy(last_dir, filename);
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char *p = strrchr(last_dir, '/');
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if (p) *p = 0;
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int loaded = 1;
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if (!same_game)
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{
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mcd_mount_save("");
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user_io_status_set("[0]", 1);
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user_io_status_set("[0]", 0);
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mcd_reset();
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loaded = 0;
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strcpy(buf, last_dir);
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char *p = strrchr(buf, '/');
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if (p)
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{
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strcpy(p + 1, "cd_bios.rom");
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loaded = user_io_file_tx(buf);
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}
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if (!loaded)
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{
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sprintf(buf, "%s/boot.rom", HomeDir());
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loaded = user_io_file_tx(buf);
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}
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if (!loaded) Info("CD BIOS not found!", 4000);
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}
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if (loaded && *filename)
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{
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if (cdd.Load(filename) > 0)
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{
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cdd.status = cdd.loaded ? CD_STAT_STOP : CD_STAT_NO_DISC;
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cdd.latency = 10;
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cdd.SendData = mcd_send_data;
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cdd.CanSendData = mcd_can_send_data;
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if (!same_game)
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{
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mcd_load_rom(filename, "cd_bios.rom", 0);
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mcd_load_rom(filename, "cart.rom", 1);
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mcd_mount_save(filename);
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cheats_init(filename, 0);
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}
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}
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else
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{
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cdd.status = CD_STAT_NO_DISC;
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}
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}
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}
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void mcd_reset() {
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need_reset = 1;
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}
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int mcd_send_data(uint8_t* buf, int len, uint8_t index) {
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// set index byte
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user_io_set_index(index);
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user_io_set_download(1);
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user_io_file_tx_data(buf, len);
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user_io_set_download(0);
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return 1;
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}
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static char int_blank[] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x00, 0x00, 0x00, 0x00, 0x40,
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0x00, 0x7D, 0x00, 0x7D, 0x00, 0x7D, 0x00, 0x7D, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x53, 0x45, 0x47, 0x41, 0x5F, 0x43, 0x44, 0x5F, 0x52, 0x4F, 0x4D, 0x00, 0x01, 0x00, 0x00, 0x00,
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0x52, 0x41, 0x4D, 0x5F, 0x43, 0x41, 0x52, 0x54, 0x52, 0x49, 0x44, 0x47, 0x45, 0x5F, 0x5F, 0x5F,
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};
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static char ext_blank[] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x5F, 0x00, 0x00, 0x00, 0x00, 0x40,
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0x1F, 0xFD, 0x1F, 0xFD, 0x1F, 0xFD, 0x1F, 0xFD, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x53, 0x45, 0x47, 0x41, 0x5F, 0x43, 0x44, 0x5F, 0x52, 0x4F, 0x4D, 0x00, 0x01, 0x00, 0x00, 0x00,
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0x52, 0x41, 0x4D, 0x5F, 0x43, 0x41, 0x52, 0x54, 0x52, 0x49, 0x44, 0x47, 0x45, 0x5F, 0x5F, 0x5F,
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};
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void mcd_fill_blanksave(uint8_t *buffer, uint32_t lba)
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{
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if (lba == 0xF)
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{
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memcpy(buffer, int_blank, 512);
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}
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else if (lba == 0x40F)
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{
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memcpy(buffer, ext_blank, 512);
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}
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else
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{
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memset(buffer, 0, 512);
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}
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}
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int mcd_can_send_data(uint8_t type) {
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if (type == 1) {
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return 1;
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}
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// Ask the FPGA if it is ready to receive a sector
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spi_uio_cmd_cont(UIO_CD_GET);
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spi_w(MCD_GET_SEND_DATA | (type << 2));
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uint16_t data = spi_w(0);
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DisableIO();
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return (data == 1);
|
|
}
|