Add puts function and call it for Hello, World!

build_rom.sh

@@ -0,0 +1,10 @@
+#! /usr/bin/env bash
+
+set -e
+
+padbin 32 build/gba-release/src/player/nostalgia.bin
+echo NOSTALGIA_MEDIA_HEADER_________ > media_header.txt
+oxfs format 32 1m nostalgia_media.oxfs
+./build/current/src/tools/nost-pack -fs nostalgia_media.oxfs -img charset.png -inode 1 -c
+cat build/gba-release/src/player/nostalgia.bin media_header.txt nostalgia_media.oxfs > nostalgia.gba
+gbafix nostalgia.gba

media_header.txt

@@ -0,0 +1 @@
+NOSTALGIA_MEDIA_HEADER_________

src/core/gba/gfx.cpp

@@ -11,6 +11,7 @@
 #include "addresses.hpp"
 #include "media.hpp"
 #include "gba.hpp"
+#include "../gfx.hpp"
 
 namespace nostalgia {
 namespace core {
@@ -20,6 +21,101 @@ using namespace ox::fs;
 #define TILE_ADDR  ((CharBlock*) 0x06000000)
 #define TILE8_ADDR ((CharBlock8*) 0x06000000)
 
+// map ASCII values to the nostalgia charset
+static char charMap[128] = {
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	38, // !
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	37, // ,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	0,
+	1,  // A
+	2,  // B
+	3,  // C
+	4,  // D
+	5,  // E
+	6,  // F
+	7,  // G
+	8,  // H
+	9,  // I
+	10, // J
+	11, // K
+	12, // L
+	13, // M
+	14, // N
+	15, // O
+	16, // P
+	17, // Q
+	18, // R
+	19, // S
+	20, // T
+	21, // U
+	22, // V
+	23, // W
+	24, // X
+	25, // Y
+	26, // Z
+};
+
 ox::Error initGfx() {
 	/* Sprite Mode ----\ */
 	/*             ---\| */
@@ -33,15 +129,20 @@ ox::Error initGfx() {
 	REG_BG0CNT |= (1 << 7); // set to use 8 bits per pixel
 	if (fs) {
 		FileStore32::FsSize_t readSize = 0;
-		fs->read(1, 511, 8 * 64 * 36, &TILE8_ADDR[0][1], nullptr);
+		fs->read(1, 512, 8 * 64 * 36, &TILE8_ADDR[0][1], nullptr);
 		fs->read(1, 0, 512, &MEM_PALLETE_BG[0], &readSize);
 	}
 
-	MEM_BG_MAP[28][106] = 1;
-	MEM_BG_MAP[28][107] = 1;
+	puts(296, "HELLO, WORLD!");
 
 	return 0;
 }
 
+void puts(int loc, const char *str) {
+	for (int i = 0; str[i]; i++) {
+		MEM_BG_MAP[28][loc + i] = charMap[(int) str[i]];
+	}
+}
+
 }
 }

src/core/gfx.hpp

@@ -14,5 +14,7 @@ namespace core {
 
 ox::Error initGfx();
 
+void puts(int loc, const char *str);
+
 }
 }