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Revert "chore: tick on memory access instead of 1cpi" 

This reverts commit 7f555095f2.
This commit is contained in:
Rekai Nyangadzayi Musuka 2022-10-21 05:12:30 -03:00
parent 84273cbdad
commit 147f6ac9ec
2 changed files with 5 additions and 17 deletions
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16
src/Bus.zig
View File

@ -27,8 +27,6 @@ tim: Timers,
iwram: Iwram,
ewram: Ewram,
sched: *Scheduler,
io: Io,
pub fn init(alloc: Allocator, sched: *Scheduler, rom_path: []const u8, bios_path: ?[]const u8, save_path: ?[]const u8) !Self {
@ -42,7 +40,6 @@ pub fn init(alloc: Allocator, sched: *Scheduler, rom_path: []const u8, bios_path
.dma = DmaControllers.init(),
.tim = Timers.init(sched),
.io = Io.init(),
.sched = sched,
};
}
@ -55,8 +52,6 @@ pub fn deinit(self: Self) void {
}
pub fn read32(self: *const Self, addr: u32) u32 {
self.sched.tick += 1;
return switch (addr) {
// General Internal Memory
0x0000_0000...0x0000_3FFF => self.bios.get32(addr),
@ -79,7 +74,7 @@ pub fn read32(self: *const Self, addr: u32) u32 {
}
pub fn write32(self: *Self, addr: u32, word: u32) void {
self.sched.tick += 1;
// TODO: write32 can write to GamePak Flash
switch (addr) {
// General Internal Memory
@ -97,8 +92,6 @@ pub fn write32(self: *Self, addr: u32, word: u32) void {
}
pub fn read16(self: *const Self, addr: u32) u16 {
self.sched.tick += 1;
return switch (addr) {
// General Internal Memory
0x0000_0000...0x0000_3FFF => self.bios.get16(addr),
@ -121,8 +114,7 @@ pub fn read16(self: *const Self, addr: u32) u16 {
}
pub fn write16(self: *Self, addr: u32, halfword: u16) void {
self.sched.tick += 1;
// TODO: write16 can write to GamePak Flash
switch (addr) {
// General Internal Memory
0x0200_0000...0x02FF_FFFF => self.ewram.set16(addr & 0x3FFFF, halfword),
@ -140,8 +132,6 @@ pub fn write16(self: *Self, addr: u32, halfword: u16) void {
}
pub fn read8(self: *const Self, addr: u32) u8 {
self.sched.tick += 1;
return switch (addr) {
// General Internal Memory
0x0000_0000...0x0000_3FFF => self.bios.get8(addr),
@ -165,8 +155,6 @@ pub fn read8(self: *const Self, addr: u32) u8 {
}
pub fn write8(self: *Self, addr: u32, byte: u8) void {
self.sched.tick += 1;
switch (addr) {
// General Internal Memory
0x0200_0000...0x02FF_FFFF => self.ewram.set8(addr & 0x3FFFF, byte),

6
src/emu.zig
View File

@ -43,9 +43,9 @@ pub fn run(kind: RunKind, quit: *Atomic(bool), fps: *FpsAverage, sched: *Schedul
}
pub fn runFrame(sched: *Scheduler, cpu: *Arm7tdmi, bus: *Bus) void {
const frame_end = sched.tick + cycles_per_frame;
while (sched.tick < frame_end) {
var cycles: u64 = 0;
while (cycles < cycles_per_frame) : (cycles += 1) {
sched.tick += 1;
_ = cpu.step();
while (sched.tick >= sched.nextTimestamp()) {