i should implement DSP DMA...

core/broadway/mmio/vi.cpp

@@ -4,12 +4,67 @@
 
 namespace weee::core {
 video_interface::video_interface(mem &mem) {
+    mem.register_read16_handler(0x0c002000, 0x0c0020ff, [&](ircolib::u32 addr) { return read16(addr); });
+    mem.register_read32_handler(0x0c002000, 0x0c0020ff, [&](ircolib::u32 addr) { return read32(addr); });
     mem.register_write16_handler(0x0c002000, 0x0c0020ff,
                                  [&](ircolib::u32 addr, ircolib::u16 value) { write16(addr, value); });
     mem.register_write32_handler(0x0c002000, 0x0c0020ff,
                                  [&](ircolib::u32 addr, ircolib::u32 value) { write32(addr, value); });
 }
 
+ircolib::u16 video_interface::read16(ircolib::u32 addr) {
+    switch (addr) {
+    case 0x00:
+        return vtr.raw;
+    case 0x02:
+        return dcr.raw;
+    case 0x4a:
+        return hsr.raw;
+    case 0x6c:
+        return viclk & 1;
+    case 0x70:
+        return 0x0280;
+    default:
+        ircolib::panic("video_interface::read16 from unimplemented addr 0x{:04X}", addr);
+        return 0;
+    }
+}
+
+ircolib::u32 video_interface::read32(ircolib::u32 addr) {
+    switch (addr) {
+    case 0x02:
+        return dcr.raw;
+    case 0x04:
+        return htr0.raw;
+    case 0x08:
+        return htr1.raw;
+    case 0x0c:
+        return vto.raw;
+    case 0x10:
+        return vte.raw;
+    case 0x14:
+        return bbei.raw;
+    case 0x18:
+        return bboi.raw;
+    case 0x1c:
+        return tfbl.raw & 0x1ffffe00;
+    case 0x24:
+        return bfbl.raw & 0x10fffe00;
+    case 0x4c:
+    case 0x50:
+    case 0x54:
+        return fct0[addr - 0x4c].raw;
+    case 0x58:
+    case 0x5c:
+    case 0x60:
+    case 0x64:
+        return fct1[addr - 0x58].raw;
+    default:
+        ircolib::panic("video_interface::read32 from unimplemented addr 0x{:04X}", addr);
+        return 0;
+    }
+}
+
 void video_interface::write16(ircolib::u32 addr, ircolib::u16 value) {
     switch (addr) {
     case 0x00: