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https://github.com/gopher64/gopher64.git
synced 2026-07-11 01:25:20 +02:00
GB RTC saving (#857)
* GB RTC saving * GB RTC saving * GB RTC saving * GB RTC saving * GB RTC saving * GB RTC saving * GB RTC saving * GB RTC saving * GB RTC saving * more
This commit is contained in:
Logan McNaughton
+104
-10
@@ -1,5 +1,6 @@
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use crate::device;
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use std::io::Write;
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const MBC3_RTC_SECONDS: usize = 0;
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const MBC3_RTC_MINUTES: usize = 1;
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const MBC3_RTC_HOURS: usize = 2;
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@@ -21,7 +22,7 @@ pub struct GbCart {
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pub latch: bool,
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pub rtc_regs: [u8; MBC3_RTC_REGS_COUNT],
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pub rtc_regs_latch: [u8; MBC3_RTC_REGS_COUNT],
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pub current_time: i64,
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pub rtc_timestamp: i64,
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pub last_time: i64,
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}
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@@ -35,9 +36,98 @@ pub enum CartType {
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MBC5RamBatt,
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}
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fn update_rtc_regs(cart: &mut device::controller::gbcart::GbCart) {
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let mut diff = cart.current_time - cart.last_time;
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cart.last_time = cart.current_time;
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pub fn init(gb_cart: &mut device::controller::gbcart::GbCart, rom: &[u8], ram: &[u8]) {
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gb_cart.rom = rom.to_vec();
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let offset;
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match ram.len() % 8192 {
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44 => {
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offset = ram.len() - 44;
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gb_cart.ram = ram[..ram.len() - 44].to_vec();
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gb_cart.rtc_timestamp =
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i32::from_le_bytes(ram[offset + 40..offset + 44].try_into().unwrap()) as i64;
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}
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48 => {
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offset = ram.len() - 48;
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gb_cart.ram = ram[..ram.len() - 48].to_vec();
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gb_cart.rtc_timestamp =
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i64::from_le_bytes(ram[offset + 40..offset + 48].try_into().unwrap());
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}
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_ => {
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gb_cart.ram = ram.to_vec();
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return;
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}
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}
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gb_cart.rtc_regs[MBC3_RTC_SECONDS] =
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u32::from_le_bytes(ram[offset..offset + 4].try_into().unwrap()) as u8;
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gb_cart.rtc_regs[MBC3_RTC_MINUTES] =
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u32::from_le_bytes(ram[offset + 4..offset + 8].try_into().unwrap()) as u8;
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gb_cart.rtc_regs[MBC3_RTC_HOURS] =
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u32::from_le_bytes(ram[offset + 8..offset + 12].try_into().unwrap()) as u8;
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gb_cart.rtc_regs[MBC3_RTC_DAYS_L] =
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u32::from_le_bytes(ram[offset + 12..offset + 16].try_into().unwrap()) as u8;
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gb_cart.rtc_regs[MBC3_RTC_DAYS_H] =
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u32::from_le_bytes(ram[offset + 16..offset + 20].try_into().unwrap()) as u8;
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gb_cart.rtc_regs_latch[MBC3_RTC_SECONDS] =
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u32::from_le_bytes(ram[offset + 20..offset + 24].try_into().unwrap()) as u8;
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gb_cart.rtc_regs_latch[MBC3_RTC_MINUTES] =
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u32::from_le_bytes(ram[offset + 24..offset + 28].try_into().unwrap()) as u8;
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gb_cart.rtc_regs_latch[MBC3_RTC_HOURS] =
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u32::from_le_bytes(ram[offset + 28..offset + 32].try_into().unwrap()) as u8;
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gb_cart.rtc_regs_latch[MBC3_RTC_DAYS_L] =
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u32::from_le_bytes(ram[offset + 32..offset + 36].try_into().unwrap()) as u8;
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gb_cart.rtc_regs_latch[MBC3_RTC_DAYS_H] =
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u32::from_le_bytes(ram[offset + 36..offset + 40].try_into().unwrap()) as u8;
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}
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pub fn save(
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gb_cart: &mut device::controller::gbcart::GbCart,
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elapsed_time: i64,
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ram_path: &std::string::String,
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) {
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update_rtc_regs(gb_cart, elapsed_time);
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if let Ok(file) = std::fs::File::create(ram_path) {
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let mut f = std::io::BufWriter::new(file);
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f.write_all(&gb_cart.ram).unwrap();
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if gb_cart.cart_type == CartType::MBC3RamBattRtc {
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f.write_all(&(gb_cart.rtc_regs[MBC3_RTC_SECONDS] as u32).to_le_bytes())
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.unwrap();
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f.write_all(&(gb_cart.rtc_regs[MBC3_RTC_MINUTES] as u32).to_le_bytes())
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.unwrap();
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f.write_all(&(gb_cart.rtc_regs[MBC3_RTC_HOURS] as u32).to_le_bytes())
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.unwrap();
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f.write_all(&(gb_cart.rtc_regs[MBC3_RTC_DAYS_L] as u32).to_le_bytes())
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.unwrap();
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f.write_all(&(gb_cart.rtc_regs[MBC3_RTC_DAYS_H] as u32).to_le_bytes())
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.unwrap();
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f.write_all(&(gb_cart.rtc_regs_latch[MBC3_RTC_SECONDS] as u32).to_le_bytes())
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.unwrap();
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f.write_all(&(gb_cart.rtc_regs_latch[MBC3_RTC_MINUTES] as u32).to_le_bytes())
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.unwrap();
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f.write_all(&(gb_cart.rtc_regs_latch[MBC3_RTC_HOURS] as u32).to_le_bytes())
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.unwrap();
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f.write_all(&(gb_cart.rtc_regs_latch[MBC3_RTC_DAYS_L] as u32).to_le_bytes())
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.unwrap();
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f.write_all(&(gb_cart.rtc_regs_latch[MBC3_RTC_DAYS_H] as u32).to_le_bytes())
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.unwrap();
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let timestamp = gb_cart.rtc_timestamp.saturating_add(elapsed_time);
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f.write_all(×tamp.to_le_bytes()).unwrap();
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f.flush().unwrap();
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}
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} else {
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eprintln!("Error saving TransferPak RAM to {ram_path}");
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}
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}
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fn update_rtc_regs(cart: &mut device::controller::gbcart::GbCart, elapsed_time: i64) {
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let mut diff = elapsed_time - cart.last_time;
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cart.last_time = elapsed_time;
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if diff > 0 {
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cart.rtc_regs[MBC3_RTC_SECONDS] += (diff % 60) as u8;
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@@ -154,6 +244,7 @@ fn write_mbc3(
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address: u16,
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data: usize,
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size: usize,
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elapsed_time: i64,
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) {
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let value = pif_ram[data + size - 1];
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if address < 0x2000 {
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@@ -169,7 +260,7 @@ fn write_mbc3(
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} else if address < 0x8000 {
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if cart.cart_type == CartType::MBC3RamBattRtc {
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if !cart.latch && (value & 0x1) != 0 {
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update_rtc_regs(cart);
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update_rtc_regs(cart, elapsed_time);
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cart.rtc_regs_latch = cart.rtc_regs;
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}
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cart.latch = (value & 0x1) != 0;
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@@ -196,6 +287,7 @@ fn read_mbc3(
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address: u16,
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data: usize,
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size: usize,
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elapsed_time: i64,
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) {
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if address < 0x4000 {
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let banked_address = address & 0x3FFF;
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@@ -225,7 +317,7 @@ fn read_mbc3(
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pif_ram[data + i] = cart.rtc_regs_latch[cart.ram_bank as usize - 0x8];
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}
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} else {
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update_rtc_regs(cart);
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update_rtc_regs(cart, elapsed_time);
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for i in 0..size {
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pif_ram[data + i] = cart.rtc_regs[cart.ram_bank as usize - 0x8];
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}
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@@ -306,6 +398,7 @@ pub fn read(
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address: u16,
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data: usize,
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size: usize,
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elapsed_time: i64,
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) {
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if !cart.enabled {
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for i in 0..size {
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@@ -315,8 +408,8 @@ pub fn read(
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}
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match cart.cart_type {
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CartType::MBC1RamBatt => read_mbc1(pif_ram, cart, address, data, size),
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CartType::MBC3RamBatt => read_mbc3(pif_ram, cart, address, data, size),
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CartType::MBC3RamBattRtc => read_mbc3(pif_ram, cart, address, data, size),
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CartType::MBC3RamBatt => read_mbc3(pif_ram, cart, address, data, size, elapsed_time),
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CartType::MBC3RamBattRtc => read_mbc3(pif_ram, cart, address, data, size, elapsed_time),
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CartType::MBC5RamBatt => read_mbc5(pif_ram, cart, address, data, size),
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_ => panic!("Unsupported cart type"),
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}
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@@ -328,14 +421,15 @@ pub fn write(
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address: u16,
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data: usize,
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size: usize,
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elapsed_time: i64,
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) {
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if !cart.enabled {
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return;
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}
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match cart.cart_type {
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CartType::MBC1RamBatt => write_mbc1(pif_ram, cart, address, data, size),
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CartType::MBC3RamBatt => write_mbc3(pif_ram, cart, address, data, size),
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CartType::MBC3RamBattRtc => write_mbc3(pif_ram, cart, address, data, size),
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CartType::MBC3RamBatt => write_mbc3(pif_ram, cart, address, data, size, elapsed_time),
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CartType::MBC3RamBattRtc => write_mbc3(pif_ram, cart, address, data, size, elapsed_time),
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CartType::MBC5RamBatt => write_mbc5(pif_ram, cart, address, data, size),
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_ => panic!("Unsupported cart type"),
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}
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@@ -52,13 +52,13 @@ pub fn read(device: &mut device::Device, channel: usize, address: u16, data: usi
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}
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}
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0xC..=0xF => {
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pak.cart.current_time = device.vi.elapsed_time as i64;
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device::controller::gbcart::read(
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&mut device.pif.ram,
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&mut pak.cart,
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0x4000 * pak.bank + (address & 0x7fff) - 0x4000,
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data,
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size,
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device.vi.elapsed_time as i64,
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);
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}
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_ => {
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@@ -119,13 +119,13 @@ pub fn write(device: &mut device::Device, channel: usize, address: u16, data: us
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}
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}
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0xC..=0xF => {
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pak.cart.current_time = device.vi.elapsed_time as i64;
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device::controller::gbcart::write(
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&device.pif.ram,
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&mut pak.cart,
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0x4000 * pak.bank + (address & 0x7fff) - 0x4000,
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data,
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size,
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device.vi.elapsed_time as i64,
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);
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}
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_ => {
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+6
-8
@@ -185,8 +185,7 @@ async fn main() -> std::io::Result<()> {
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&& let Ok(rom) = std::fs::read(&device.ui.config.input.gb_rom_path[i])
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&& let Ok(ram) = std::fs::read(&device.ui.config.input.gb_ram_path[i])
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{
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device.transferpaks[i].cart.rom = rom;
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device.transferpaks[i].cart.ram = ram;
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device::controller::gbcart::init(&mut device.transferpaks[i].cart, &rom, &ram);
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}
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}
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@@ -238,13 +237,12 @@ async fn main() -> std::io::Result<()> {
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if device.ui.config.input.transfer_pak[i]
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&& !device.ui.config.input.gb_ram_path[i].is_empty()
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&& !device.transferpaks[i].cart.ram.is_empty()
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&& let Err(e) = tokio::fs::write(
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&device.ui.config.input.gb_ram_path[i],
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&device.transferpaks[i].cart.ram,
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)
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.await
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{
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eprintln!("Error writing GB RAM: {}", e);
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device::controller::gbcart::save(
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&mut device.transferpaks[i].cart,
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device.vi.elapsed_time as i64,
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&device.ui.config.input.gb_ram_path[i],
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);
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}
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}
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}
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