[VM][FM7][DISPLAY] Reduce re-calculate parameters.

diff --git a/source/src/vm/fm7/display.cpp b/source/src/vm/fm7/display.cpp
index 9e040f8..ffee722 100644 (file)
--- a/source/src/vm/fm7/display.cpp
+++ b/source/src/vm/fm7/display.cpp
@@ -1415,6 +1415,7 @@ uint32_t DISPLAY::read_signal(int id)
 void DISPLAY::write_signal(int id, uint32_t data, uint32_t mask)
 {
        bool flag = ((data & mask) != 0);
+       bool oldflag;
        int y;
        switch(id) {
                case SIG_FM7_SUB_HALT:
@@ -1549,6 +1550,7 @@ void DISPLAY::write_signal(int id, uint32_t data, uint32_t mask)
                                }
                        }
 # else
+                       oldflag = mode320;
                        mode320 = flag;
                        {
                
@@ -1565,7 +1567,7 @@ void DISPLAY::write_signal(int id, uint32_t data, uint32_t mask)
                        alu->write_signal(SIG_ALU_Y_HEIGHT, 200, 0xffff);
                        alu->write_signal(SIG_ALU_400LINE, 0, 0xffffffff);
                        vram_wrote = true;
-                       setup_display_mode();
+                       if(mode320 != oldflag) setup_display_mode();
 # endif
 #endif                 
                        break;
@@ -2119,6 +2121,7 @@ uint32_t DISPLAY::read_data8(uint32_t addr)
 void DISPLAY::write_mmio(uint32_t addr, uint8_t data)
 {
        uint8_t rval = 0;
+       uint8_t active_block_old;
        pair_t tmpvar;
        if(addr < 0xd400) return;
        
@@ -2273,10 +2276,11 @@ void DISPLAY::write_mmio(uint32_t addr, uint8_t data)
                        break;
 # if defined(_FM77AV40EX) || defined(_FM77AV40SX)
                case 0x33: //
+                       active_block_old = vram_active_block;
                        vram_active_block = data & 0x01;
                        if(vram_display_block != (((data & 0x10) != 0) ? 1 : 0)) vram_wrote = true;
                        vram_display_block = ((data & 0x10) != 0) ? 1 : 0;
-                       setup_display_mode();
+                       if(vram_active_block != active_block_old) setup_display_mode();
                        break;
                        // Window
                case 0x38: //