Initial program example

Blit 3 pixels to the screen.

source: https://www.coranac.com/tonc/text/first.htm

2 files changed, 12 insertions, 33 deletions

diff --git a/Makefile b/Makefile
index 46564cc..fbd5fe3 100644
--- a/Makefile
+++ b/Makefile
@@ -18,17 +18,17 @@ WATCH_SRC      := $(wildcard $(SRC_DIR)/*.c)
 WATCH_SRC      += $(wildcard $(SRC_DIR)/*.h)
 
 # Output library names and executables.
-BIN_NAME       := template
+TARGET         := first
 BUILD_DIR      := build
-ELF            := $(BUILD_DIR)/$(BIN_NAME).elf
-BIN            := $(BUILD_DIR)/$(BIN_NAME).gba
+ELF            := $(BUILD_DIR)/$(TARGET).elf
+BIN            := $(BUILD_DIR)/$(TARGET).gba
 
 # Compiler and linker configuration.
 CC             := arm-none-eabi-gcc
 OBJCOPY        := arm-none-eabi-objcopy
 ARCH           := -mthumb -mthumb-interwork
 SPECS          := -specs=gba.specs
-CFLAGS         := -g -Wall -Wextra -pedantic
+CFLAGS         := -g -Wall -Wextra -pedantic -fno-strict-aliasing
 CFLAGS         += -mcpu=arm7tdmi -mtune=arm7tdmi $(ARCH)
 CFLAGS         += -I$(LIBGBA_SRC)
 LDFLAGS        := $(ARCH) $(SPECS)
diff --git a/src/main.c b/src/main.c
index 64f6234..655373b 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,33 +1,12 @@
-#include <gba_console.h>
-#include <gba_video.h>
-#include <gba_interrupt.h>
-#include <gba_systemcalls.h>
-#include <gba_input.h>
-#include <stdio.h>
-#include <stdlib.h>
+int main()
+{
+    *(unsigned int*)0x04000000 = 0x0403;
 
-//---------------------------------------------------------------------------------
-// Program entry point
-//---------------------------------------------------------------------------------
-int main(void) {
-//---------------------------------------------------------------------------------
+    ((unsigned short*)0x06000000)[120+80*240] = 0x001F;
+    ((unsigned short*)0x06000000)[136+80*240] = 0x03E0;
+    ((unsigned short*)0x06000000)[120+96*240] = 0x7C00;
 
+    while(1);
 
-        // the vblank interrupt must be enabled for VBlankIntrWait() to work
-        // since the default dispatcher handles the bios flags no vblank handler
-        // is required
-        irqInit();
-        irqEnable(IRQ_VBLANK);
-
-        consoleDemoInit();
-
-        // ansi escape sequence to set print co-ordinates
-        // /x1b[line;columnH
-        iprintf("\x1b[10;10HHello World!\n");
-
-        while (1) {
-                VBlankIntrWait();
-        }
+    return 0;
 }
-
-