Add STDIN interrupt and error handling for all interrupts

src/execute/interrupts.cpp

@@ -7,6 +7,7 @@ namespace Execute
 	{
 		return std::vector<InterruptFn>
 		{
+			/* STDOUT INTERRUPTS */
 			// 0 print char
 			[](Execute::Registers & registers, std::vector<std::uint8_t> & memory) { std::putc(registers.A, stdout); },
 			// 1 print decimal integer
@@ -21,6 +22,13 @@ namespace Execute
 				{
 					std::putc(memory[i], stdout);
 				}
+			},
+
+			/* STDIN INTERRUPTS */
+			// 10 get char from STDIN
+			[](Execute::Registers & registers, std::vector<std::uint8_t> & memory)
+			{
+				registers.A = std::getchar();
 			}
 		};
 	}