Impl DMA VRAM fill

1 files changed, 12 insertions, 2 deletions

diff --git a/vdp.hpp b/vdp.hpp
index 030b38e..1db49db 100644
--- a/vdp.hpp
+++ b/vdp.hpp
@@ -77,8 +77,14 @@ class VDP {
                 uint8_t* base,
                 uint32_t source_address,
                 uint16_t destination_address,
-                uint16_t transfer_size);
-        static void runDMAVRAMFill(uint8_t* base);
+                uint16_t transfer_size,
+                uint8_t increment);
+        static void runDMAVRAMFill(
+                uint8_t* base,
+                uint16_t destination_address,
+                uint16_t transfer_size,
+                uint8_t increment,
+                uint16_t filler);
         static void runDMAVRAMCopy(uint8_t* base);
 
         static constexpr size_t kRegistersCount = static_cast<size_t>(RegID::kRegistersCount);
@@ -90,7 +96,11 @@ class VDP {
 
         StatusRegister _status{};
         bool _control_write_second_word{};
+        // DMA Fill is ready to kick in, waiting for filler set to data port
+        bool _dma_ready{};
         uint16_t _lines_counter{};
+        // TODO: Make _address_mode of type AddressMode somehow and all private
+        // methods using it should be accepting AddressMode instead of uint8_t.
         uint8_t _address_mode{};
         uint16_t _address{};
         uint8_t _reg[kRegistersCount]{};