From 5aebdf11dc1ae57b439ebfd30ba3ebc72ebc1369 Mon Sep 17 00:00:00 2001
From: yeti0904 <mesyeti@mesyeti.uk>
Date: Thu, 9 Nov 2023 16:46:39 +0000
Subject: [PATCH] some more logging

---
 source/computer.d                   |  1 +
 source/devices/graphicsController.d | 14 +++++++++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/source/computer.d b/source/computer.d
index ebe742f..824700f 100644
--- a/source/computer.d
+++ b/source/computer.d
@@ -669,6 +669,7 @@ class Computer {
 int ComputerCLI(string[] args) {
 	auto display  = new Display();
 	display.Init();
+	writeln("Initialised display");
 	
 	auto computer = new Computer();
 	display.computer = computer;
diff --git a/source/devices/graphicsController.d b/source/devices/graphicsController.d
index 5692b8c..d630308 100644
--- a/source/devices/graphicsController.d
+++ b/source/devices/graphicsController.d
@@ -1,6 +1,7 @@
 module yeti16.devices.graphicsController;
 
 import std.stdio;
+import core.stdc.stdlib;
 import bindbc.sdl;
 import yeti16.fonts;
 import yeti16.types;
@@ -73,7 +74,9 @@ class GraphicsController : Device {
 				break;
 			}
 			case 'M': {
-				switch (computer.ram[0x000404]) {
+				ubyte mode = computer.ram[0x000404];
+			
+				switch (mode) {
 					case 0x00: {
 						computer.display.resolution = Vec2!int(80 * 8, 40 * 8);
 						break;
@@ -104,6 +107,15 @@ class GraphicsController : Device {
 					SDL_TEXTUREACCESS_STREAMING, computer.display.resolution.x,
 					computer.display.resolution.y
 				);
+
+				if (computer.display.texture is null) {
+					stderr.writefln(
+						"Failed to create texture: %s", computer.display.GetError()
+					);
+					exit(1);
+				}
+
+				writefln("Initialised graphics mode 0x%.2X", mode);
 				break;
 			}
 			default: break;