add 320x240 mode

MESYETI · Nov 17, 2023 · 28b86cd · 28b86cd
1 parent 23a29f1
commit 28b86cd
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Showing 3 changed files with 40 additions and 5 deletions.
diff --git a/docs/display.md b/docs/display.md
@@ -33,7 +33,14 @@ Attribute data is stored in 0x001275 - 0x0018B5
 
 Pixel data is stored in 0x000405 - 0x00FE05
 
-Palette data is stored in 0x00FE05 - 0x10105
+Palette data is stored in 0x00FE05 - 0x010105
+
+### 0x11
+320x240 video mode with 8bpp
+
+Pixel data is stored in 0x000405 - 0x013005
+
+Palette data is stored in 0x013005 - 0x013305
 
 ## Text data
 Text data is stored in 2 buffers:

diff --git a/source/devices/graphicsController.d b/source/devices/graphicsController.d
@@ -89,6 +89,10 @@ class GraphicsController : Device {
 						computer.display.resolution = Vec2!int(320, 200);
 						break;
 					}
+					case 0x11: {
+						computer.display.resolution = Vec2!int(320, 240);
+						break;
+					}
 					default: break;
 				}
 

diff --git a/source/display.d b/source/display.d
@@ -177,10 +177,34 @@ class Display {
 				}
 				break;
 			}
-			case 0x10: {
-				uint paletteAddr = 0x00FE05;
-				uint pixelAddr   = 0x000405;
-				uint pixelEnd    = pixelAddr + (320 * 200);
+			case 0x10:
+			case 0x11: {
+				uint     paletteAddr = 0x00FE05;
+				uint     pixelAddr   = 0x000405;
+				uint     pixelEnd    = pixelAddr + (320 * 200);
+				Vec2!int expectedRes;
+
+				final switch (videoMode) {
+					case 0x10: {
+						paletteAddr = 0x00FE05;
+						pixelAddr   = 0x000405;
+						pixelEnd    = pixelAddr + (320 * 200);
+						expectedRes = Vec2!int(320, 200);
+						break;
+					}
+					case 0x11: {
+						paletteAddr = 0x013005;
+						pixelAddr   = 0x000405;
+						pixelEnd    = pixelAddr + (320 * 240);
+						expectedRes = Vec2!int(320, 240);
+						break;
+					}
+				}
+
+				if (resolution != expectedRes) {
+					deathColour = SDL_Color(0, 0, 255, 255);
+					goto default;
+				}
 
 				SDL_SetRenderDrawColor(
 					renderer, computer.ram[paletteAddr], computer.ram[paletteAddr + 1],