chore: don't init bus in Arm7tdmi init

src/core/cpu.zig

@@ -7,7 +7,6 @@ const Bitfield = @import("bitfield").Bitfield;
 const Scheduler = @import("scheduler.zig").Scheduler;
 const FilePaths = @import("util.zig").FilePaths;
 
-const Allocator = std.mem.Allocator;
 const File = std.fs.File;
 
 // ARM Instructions
@@ -234,7 +233,7 @@ pub const Arm7tdmi = struct {
 
     r: [16]u32,
     sched: *Scheduler,
-    bus: Bus,
+    bus: *Bus,
     cpsr: PSR,
     spsr: PSR,
 
@@ -252,11 +251,11 @@ pub const Arm7tdmi = struct {
     log_buf: [0x100]u8,
     binary_log: bool,
 
-    pub fn init(alloc: Allocator, sched: *Scheduler, paths: FilePaths) !Self {
+    pub fn init(sched: *Scheduler, bus: *Bus) Self {
         return Self{
             .r = [_]u32{0x00} ** 16,
             .sched = sched,
-            .bus = try Bus.init(alloc, sched, paths),
+            .bus = bus,
             .cpsr = .{ .raw = 0x0000_001F },
             .spsr = .{ .raw = 0x0000_0000 },
             .banked_fiq = [_]u32{0x00} ** 10,
@@ -268,10 +267,6 @@ pub const Arm7tdmi = struct {
         };
     }
 
-    pub fn deinit(self: Self) void {
-        self.bus.deinit();
-    }
-
     pub fn useLogger(self: *Self, file: *const File, is_binary: bool) void {
         self.log_file = file;
         self.binary_log = is_binary;
@@ -433,13 +428,13 @@ pub const Arm7tdmi = struct {
             const opcode = self.fetch(u16);
             if (enable_logging) if (self.log_file) |file| self.debug_log(file, opcode);
 
-            thumb.lut[thumbIdx(opcode)](self, &self.bus, opcode);
+            thumb.lut[thumbIdx(opcode)](self, self.bus, opcode);
         } else {
             const opcode = self.fetch(u32);
             if (enable_logging) if (self.log_file) |file| self.debug_log(file, opcode);
 
             if (checkCond(self.cpsr, @truncate(u4, opcode >> 28))) {
-                arm.lut[armIdx(opcode)](self, &self.bus, opcode);
+                arm.lut[armIdx(opcode)](self, self.bus, opcode);
             }
         }
     }

src/core/ppu.zig

@@ -573,7 +573,7 @@ pub const Ppu = struct {
         // See if HBlank DMA is present and not enabled
 
         if (!self.dispstat.vblank.read())
-            pollBlankingDma(&cpu.bus, .HBlank);
+            pollBlankingDma(cpu.bus, .HBlank);
 
         self.dispstat.hblank.set();
         self.sched.push(.HBlank, 68 * 4 -| late);
@@ -615,7 +615,7 @@ pub const Ppu = struct {
                 self.aff_bg[1].latchRefPoints();
 
                 // See if Vblank DMA is present and not enabled
-                pollBlankingDma(&cpu.bus, .VBlank);
+                pollBlankingDma(cpu.bus, .VBlank);
             }
 
             if (scanline == 227) self.dispstat.vblank.unset();