From c8d5fe2352e1bc5805af75af7a274f8d358a4223 Mon Sep 17 00:00:00 2001
From: Teufelchen1 <bennet.blischke@haw-hamburg.de>
Date: Thu, 27 Apr 2023 15:05:47 +0200
Subject: [PATCH] boards/cpu: Add limited GBA boot support to RIOT

---
 boards/gba_cartridge/Kconfig               |  13 +
 boards/gba_cartridge/Makefile              |   3 +
 boards/gba_cartridge/Makefile.features     |   2 +
 boards/gba_cartridge/Makefile.include      |   1 +
 boards/gba_cartridge/doc.txt               |   5 +
 boards/gba_cartridge/include/board.h       |  34 +++
 boards/gba_cartridge/include/periph_conf.h |  34 +++
 cpu/arm7_common/include/arm_cpu.h          |  11 +
 cpu/arm7tdmi_gba/Makefile                  |  11 +
 cpu/arm7tdmi_gba/Makefile.default          |   1 +
 cpu/arm7tdmi_gba/Makefile.dep              |   7 +
 cpu/arm7tdmi_gba/Makefile.features         |  10 +
 cpu/arm7tdmi_gba/Makefile.include          |   3 +
 cpu/arm7tdmi_gba/cartridge_header.s        |  54 ++++
 cpu/arm7tdmi_gba/cpu.c                     |  30 +++
 cpu/arm7tdmi_gba/doc.txt                   |   5 +
 cpu/arm7tdmi_gba/include/cpu.h             |  30 +++
 cpu/arm7tdmi_gba/include/cpu_conf.h        |  94 +++++++
 cpu/arm7tdmi_gba/include/periph_cpu.h      |  38 +++
 cpu/arm7tdmi_gba/include/periph_gba.h      | 106 ++++++++
 cpu/arm7tdmi_gba/ldscripts/arm7tdmi_gba.ld | 213 +++++++++++++++
 cpu/arm7tdmi_gba/startup.s                 |  92 +++++++
 cpu/arm7tdmi_gba/stdio_fb/Makefile         |   1 +
 cpu/arm7tdmi_gba/stdio_fb/font_terminal.h  | 286 +++++++++++++++++++++
 cpu/arm7tdmi_gba/stdio_fb/stdio_fb.c       | 113 ++++++++
 cpu/lpc23xx/include/cpu.h                  |  10 -
 features.yaml                              |   5 +
 makefiles/features_existing.inc.mk         |   1 +
 makefiles/stdio.inc.mk                     |   1 +
 29 files changed, 1204 insertions(+), 10 deletions(-)
 create mode 100644 boards/gba_cartridge/Kconfig
 create mode 100644 boards/gba_cartridge/Makefile
 create mode 100644 boards/gba_cartridge/Makefile.features
 create mode 100644 boards/gba_cartridge/Makefile.include
 create mode 100644 boards/gba_cartridge/doc.txt
 create mode 100644 boards/gba_cartridge/include/board.h
 create mode 100644 boards/gba_cartridge/include/periph_conf.h
 create mode 100644 cpu/arm7tdmi_gba/Makefile
 create mode 100644 cpu/arm7tdmi_gba/Makefile.default
 create mode 100644 cpu/arm7tdmi_gba/Makefile.dep
 create mode 100644 cpu/arm7tdmi_gba/Makefile.features
 create mode 100644 cpu/arm7tdmi_gba/Makefile.include
 create mode 100644 cpu/arm7tdmi_gba/cartridge_header.s
 create mode 100644 cpu/arm7tdmi_gba/cpu.c
 create mode 100644 cpu/arm7tdmi_gba/doc.txt
 create mode 100644 cpu/arm7tdmi_gba/include/cpu.h
 create mode 100644 cpu/arm7tdmi_gba/include/cpu_conf.h
 create mode 100644 cpu/arm7tdmi_gba/include/periph_cpu.h
 create mode 100644 cpu/arm7tdmi_gba/include/periph_gba.h
 create mode 100644 cpu/arm7tdmi_gba/ldscripts/arm7tdmi_gba.ld
 create mode 100644 cpu/arm7tdmi_gba/startup.s
 create mode 100644 cpu/arm7tdmi_gba/stdio_fb/Makefile
 create mode 100644 cpu/arm7tdmi_gba/stdio_fb/font_terminal.h
 create mode 100644 cpu/arm7tdmi_gba/stdio_fb/stdio_fb.c

diff --git a/boards/gba_cartridge/Kconfig b/boards/gba_cartridge/Kconfig
new file mode 100644
index 0000000000..942683c947
--- /dev/null
+++ b/boards/gba_cartridge/Kconfig
@@ -0,0 +1,13 @@
+# Copyright (c) 2023 HAW Hamburg
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+config BOARD
+    default "gba" if BOARD_GBA
+
+config BOARD_GBA
+    bool
+    default y
+    select CPU_MODEL_ARM7TDMI_GBA
diff --git a/boards/gba_cartridge/Makefile b/boards/gba_cartridge/Makefile
new file mode 100644
index 0000000000..f8fcbb53a0
--- /dev/null
+++ b/boards/gba_cartridge/Makefile
@@ -0,0 +1,3 @@
+MODULE = board
+
+include $(RIOTBASE)/Makefile.base
diff --git a/boards/gba_cartridge/Makefile.features b/boards/gba_cartridge/Makefile.features
new file mode 100644
index 0000000000..e70fc85f8e
--- /dev/null
+++ b/boards/gba_cartridge/Makefile.features
@@ -0,0 +1,2 @@
+CPU = arm7tdmi_gba
+CPU_MODEL = arm7tdmi_gba
diff --git a/boards/gba_cartridge/Makefile.include b/boards/gba_cartridge/Makefile.include
new file mode 100644
index 0000000000..a8ee432a45
--- /dev/null
+++ b/boards/gba_cartridge/Makefile.include
@@ -0,0 +1 @@
+FLASHFILE = $(BINFILE)
diff --git a/boards/gba_cartridge/doc.txt b/boards/gba_cartridge/doc.txt
new file mode 100644
index 0000000000..c02fb4b569
--- /dev/null
+++ b/boards/gba_cartridge/doc.txt
@@ -0,0 +1,5 @@
+/**
+@defgroup    boards_gba_cartridge GBA
+@ingroup     boards
+@brief       Support for the GBA
+ */
diff --git a/boards/gba_cartridge/include/board.h b/boards/gba_cartridge/include/board.h
new file mode 100644
index 0000000000..1b96468332
--- /dev/null
+++ b/boards/gba_cartridge/include/board.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2023 Bennet Blischke <bennet.blischke@haw-hamburg.de>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License v2.1. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @ingroup     boards_gba_cartridge
+ * @{
+ *
+ * @file
+ * @brief
+ *
+ * @author
+ */
+
+#ifndef BOARD_H
+#define BOARD_H
+
+#include "cpu.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BOARD_H */
+/** @} */
diff --git a/boards/gba_cartridge/include/periph_conf.h b/boards/gba_cartridge/include/periph_conf.h
new file mode 100644
index 0000000000..fd48dc9781
--- /dev/null
+++ b/boards/gba_cartridge/include/periph_conf.h
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 2023 Bennet Blischke <bennet.blischke@haw-hamburg.de>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser General
+ * Public License v2.1. See the file LICENSE in the top level directory for more
+ * details.
+ */
+
+/**
+ * @ingroup     boards_gba_cartridge
+ * @{
+ *
+ * @file
+ * @brief
+ *
+ * @author
+ */
+
+#ifndef PERIPH_CONF_H
+#define PERIPH_CONF_H
+
+#include "periph_cpu.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PERIPH_CONF_H */
+/** @} */
diff --git a/cpu/arm7_common/include/arm_cpu.h b/cpu/arm7_common/include/arm_cpu.h
index 5e64e2fc12..0885a0a3d6 100644
--- a/cpu/arm7_common/include/arm_cpu.h
+++ b/cpu/arm7_common/include/arm_cpu.h
@@ -25,6 +25,17 @@ void cpu_clock_scale(uint32_t source, uint32_t target, uint32_t *prescale);
 
 void arm_reset(void);
 
+/**
+ * @brief   Returns the current content of the link register (lr)
+ */
+static inline uintptr_t cpu_get_caller_pc(void)
+{
+    register uintptr_t lr_ptr;
+
+    __asm__ __volatile__ ("mov %0, lr" : "=r" (lr_ptr));
+    return lr_ptr;
+}
+
 /**
  * @brief Interrupt stack canary value
  *
diff --git a/cpu/arm7tdmi_gba/Makefile b/cpu/arm7tdmi_gba/Makefile
new file mode 100644
index 0000000000..47f9d0499b
--- /dev/null
+++ b/cpu/arm7tdmi_gba/Makefile
@@ -0,0 +1,11 @@
+MODULE = cpu
+
+include $(RIOTCPU)/$(CPU)/Makefile.include
+
+DIRS = $(RIOTCPU)/arm7_common
+
+ifneq (,$(filter stdio_%,$(USEMODULE)))
+  DIRS += stdio_fb
+endif
+
+include $(RIOTBASE)/Makefile.base
diff --git a/cpu/arm7tdmi_gba/Makefile.default b/cpu/arm7tdmi_gba/Makefile.default
new file mode 100644
index 0000000000..aaebee71e9
--- /dev/null
+++ b/cpu/arm7tdmi_gba/Makefile.default
@@ -0,0 +1 @@
+DISABLE_MODULE += periph_init_leds
diff --git a/cpu/arm7tdmi_gba/Makefile.dep b/cpu/arm7tdmi_gba/Makefile.dep
new file mode 100644
index 0000000000..51481f9a83
--- /dev/null
+++ b/cpu/arm7tdmi_gba/Makefile.dep
@@ -0,0 +1,7 @@
+USEMODULE += arm7_common
+
+ifeq (,$(filter stdio_%,$(USEMODULE)))
+  USEMODULE += stdio_fb
+endif
+
+include $(RIOTCPU)/arm7_common/Makefile.dep
diff --git a/cpu/arm7tdmi_gba/Makefile.features b/cpu/arm7tdmi_gba/Makefile.features
new file mode 100644
index 0000000000..08741a5846
--- /dev/null
+++ b/cpu/arm7tdmi_gba/Makefile.features
@@ -0,0 +1,10 @@
+CPU_ARCH = armv4t
+CPU_CORE = arm7tdmi_s
+
+FEATURES_PROVIDED += arch_32bit
+FEATURES_PROVIDED += arch_arm
+FEATURES_PROVIDED += arch_arm7
+FEATURES_PROVIDED += cpp
+FEATURES_PROVIDED += libstdcpp
+FEATURES_PROVIDED += newlib
+FEATURES_PROVIDED += picolibc
diff --git a/cpu/arm7tdmi_gba/Makefile.include b/cpu/arm7tdmi_gba/Makefile.include
new file mode 100644
index 0000000000..bcbaccbdc9
--- /dev/null
+++ b/cpu/arm7tdmi_gba/Makefile.include
@@ -0,0 +1,3 @@
+MCPU := arm7tdmi
+
+include $(RIOTCPU)/arm7_common/Makefile.include
diff --git a/cpu/arm7tdmi_gba/cartridge_header.s b/cpu/arm7tdmi_gba/cartridge_header.s
new file mode 100644
index 0000000000..f3aea69251
--- /dev/null
+++ b/cpu/arm7tdmi_gba/cartridge_header.s
@@ -0,0 +1,54 @@
+.section .gbaheader
+    b _startup
+    // Nintendo Logo data
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+    .byte   0x00, 0x00, 0x00, 0x00
+
+    // ASCII Game title
+    .ascii  "\0\0\0\0\0\0\0\0\0\0\0\0"
+
+    // ASCII Game code
+    .ascii  "\0\0\0\0"
+
+    // ASCII Manufacturer id
+    .ascii  "\0\0"
+
+    // Fixed value
+    .byte   0x96
+
+    // Target device (0 = GBA)
+    .byte   0x00
+
+    // Reserved
+    .word   0x00000000
+    .word   0x00000000
+
+    // Version
+    .byte   0x00
+
+    // Checksum
+    .byte   0x51
+
+    // Reserved
+    .hword  0x0000
+
+    // Multiboot header
+    .zero 36
diff --git a/cpu/arm7tdmi_gba/cpu.c b/cpu/arm7tdmi_gba/cpu.c
new file mode 100644
index 0000000000..98aa3b0b85
--- /dev/null
+++ b/cpu/arm7tdmi_gba/cpu.c
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2023 HAW Hamburg. All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     cpu_arm7tdmi_gba
+ * @{
+ */
+
+#include <stdint.h>
+#include "cpu.h"
+#include "kernel_init.h"
+
+/**
+ * @brief Initialize the CPU, set IRQ priorities, clocks
+ */
+void cpu_init(void)
+{
+    extern void board_init(void);
+
+    /* board specific setup of i/o pins */
+    board_init();
+
+    /* initialize stdio prior to periph_init() to allow use of DEBUG() there */
+    early_init();
+}
diff --git a/cpu/arm7tdmi_gba/doc.txt b/cpu/arm7tdmi_gba/doc.txt
new file mode 100644
index 0000000000..359d943c28
--- /dev/null
+++ b/cpu/arm7tdmi_gba/doc.txt
@@ -0,0 +1,5 @@
+/**
+ * @defgroup        cpu_arm7tdmi_gba GBAs ARM7TDMI
+ * @ingroup         cpu
+ * @brief           Nintendos ARM7TDMI on the GBA
+ */
diff --git a/cpu/arm7tdmi_gba/include/cpu.h b/cpu/arm7tdmi_gba/include/cpu.h
new file mode 100644
index 0000000000..b57b95cdca
--- /dev/null
+++ b/cpu/arm7tdmi_gba/include/cpu.h
@@ -0,0 +1,30 @@
+/*
+ * Copyright (C) 2023 HAW Hamburg. All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+#ifndef CPU_H
+#define CPU_H
+
+/**
+ * @ingroup     cpu_arm7tdmi_gba
+ * @{
+ */
+#include "arm_cpu.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+extern uintptr_t __stack_start;     /**< end of user stack memory space */
+
+#ifdef __cplusplus
+}
+#endif
+
+/** @} */
+#endif /* CPU_H */
diff --git a/cpu/arm7tdmi_gba/include/cpu_conf.h b/cpu/arm7tdmi_gba/include/cpu_conf.h
new file mode 100644
index 0000000000..f52c1ddb16
--- /dev/null
+++ b/cpu/arm7tdmi_gba/include/cpu_conf.h
@@ -0,0 +1,94 @@
+/*
+ * Copyright (C) 2023 HAW Hamburg. All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+#ifndef CPU_CONF_H
+#define CPU_CONF_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @ingroup     cpu_arm7tdmi_gba
+ *
+ * @{
+ */
+
+/**
+ * @file
+ * @brief       ARM7TDMI_GBA CPU configuration
+ *
+ * @author
+ */
+
+/**
+ * @brief   This arch uses the inlined irq API.
+ */
+#define IRQ_API_INLINED (1)
+
+/**
+ * @name Kernel configuration
+ * @{
+ */
+#define THREAD_EXTRA_STACKSIZE_PRINTF (512)
+
+#ifndef THREAD_STACKSIZE_DEFAULT
+#define THREAD_STACKSIZE_DEFAULT (1024)
+#endif
+
+#ifndef THREAD_STACKSIZE_IDLE
+#define THREAD_STACKSIZE_IDLE (160)
+#endif
+/** @} */
+
+/**
+ * @brief   Stack size used for the undefined instruction interrupt stack
+ */
+#define UND_STACKSIZE (64)
+
+/**
+ * @brief   Stack size used for the abort interrupt stack
+ */
+#define ABT_STACKSIZE (64)
+
+/**
+ * @brief   Stack size used for the interrupt (ISR) stack
+ */
+#ifndef ISR_STACKSIZE
+#define ISR_STACKSIZE (400)
+#endif
+
+/**
+ * @brief   Stack size used for the fast interrupt (FIQ) stack
+ */
+#define FIQ_STACKSIZE (64)
+
+/**
+ * @brief   Stack size used for the supervisor mode (SVC) stack
+ */
+#define SVC_STACKSIZE (400)
+
+/**
+ * @brief   Stack size used for the user mode/kernel init stack
+ */
+#define USR_STACKSIZE (4096)
+
+/**
+ * @brief   The CPU has 2 blocks of SRAM at different addresses.
+ *          (primary on-chip RAM and external working EWRAM)
+ */
+#define NUM_HEAPS (2)
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* CPU_CONF_H */
diff --git a/cpu/arm7tdmi_gba/include/periph_cpu.h b/cpu/arm7tdmi_gba/include/periph_cpu.h
new file mode 100644
index 0000000000..9e93b4049d
--- /dev/null
+++ b/cpu/arm7tdmi_gba/include/periph_cpu.h
@@ -0,0 +1,38 @@
+/*
+ * Copyright (C) 2023 HAW Hamburg. All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup         cpu_arm7tdmi_gba
+ * @{
+ *
+ * @file
+ * @brief           CPU specific definitions for internal peripheral handling
+ *
+ * @author
+ */
+
+#ifndef PERIPH_CPU_H
+#define PERIPH_CPU_H
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief    Clock configuration
+ */
+#define CLOCK_CORECLOCK (16780000U) /* 16.78MHz */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PERIPH_CPU_H */
+/** @} */
diff --git a/cpu/arm7tdmi_gba/include/periph_gba.h b/cpu/arm7tdmi_gba/include/periph_gba.h
new file mode 100644
index 0000000000..429b7701b3
--- /dev/null
+++ b/cpu/arm7tdmi_gba/include/periph_gba.h
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2023 HAW Hamburg. All rights reserved.
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     cpu_arm7tdmi_gba
+ * @{
+ *
+ * @file
+ * @brief       GBA specific definitions for internal peripheral handling
+ *
+ * @author      Bennet Blischke
+ */
+
+#ifndef PERIPH_GBA_H
+#define PERIPH_GBA_H
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/**
+ * @brief   Type for 32-bit registers
+ */
+#define REG32(ADDR) (*(uint32_t volatile (*))(ADDR))
+
+/**
+ * @brief   Type for 16-bit registers
+ */
+#define REG16(ADDR) (*(uint16_t volatile (*))(ADDR))
+
+/**
+ * @brief   Type for 16-bit memory addresses
+ */
+#define MEM16(ADDR) ((uint16_t(*))(ADDR))
+
+/**
+ * @brief    Screen dimension in pixel
+ * @{
+ */
+#define GBA_SCREEN_WIDTH (240)  /**< width */
+#define GBA_SCREEN_HEIGHT (160) /**< height */
+/** @} */
+
+/**
+ * @brief Display Control register
+ */
+#define GBA_DISPCNT REG16(0x4000000)
+
+/**
+ * @name Settings for GBA_DISPCNT
+ * @{
+ */
+#define GBA_DISPCNT_BGMODE_0 0x0000    /**< Tiled, four layers, up to 1024 tiles */
+#define GBA_DISPCNT_BGMODE_1 0x0001    /**< Tiled, three layers, up to 1024 tiles */
+#define GBA_DISPCNT_BGMODE_2 0x0002    /**< Tiled, two layers, up to 1024 tiles */
+#define GBA_DISPCNT_BGMODE_3 0x0003    /**< Bitmap, 240x160, 15-bit RGB */
+#define GBA_DISPCNT_BGMODE_4 0x0004    /**< Bitmap, 240x160, 8-bit RGB */
+#define GBA_DISPCNT_BGMODE_5 0x0005    /**< Bitmap, 160x128, 15-bit RGB */
+
+#define GBA_DISPCNT_SDBG_0 0x0100      /**< Enable display of background 0 */
+#define GBA_DISPCNT_SDBG_1 0x0200      /**< Enable display of background 1 */
+#define GBA_DISPCNT_SDBG_2 0x0400      /**< Enable display of background 2 */
+#define GBA_DISPCNT_SDBG_3 0x0800      /**< Enable display of background 3 */
+
+#define GBA_DISPCNT_SDOBJ 0x1000       /**< Enable display of objects */
+/** @} */
+
+/**
+ * @brief General LCD Status register
+ */
+#define GBA_DISPSTAT REG16(0x4000004)
+
+/**
+ * @name LCD background control registers
+ * @{
+ */
+#define GBA_BG0CNT REG16(0x4000008)    /**< BG0 */
+#define GBA_BG1CNT REG16(0x400000a)    /**< BG1 */
+#define GBA_BG2CNT REG16(0x400000c)    /**< BG2 */
+#define GBA_BG3CNT REG16(0x400000e)    /**< BG3 */
+/** @} */
+
+/**
+ * @brief VRAM color palette memory
+ */
+#define GBA_VRAM_PALETTE MEM16(0x5000000)
+
+/**
+ * @brief VRAM, 96Kb, 0x6017FFF - size depends on display mode!
+ */
+#define GBA_VRAM MEM16(0x6000000)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PERIPH_GBA_H */
+/** @} */
diff --git a/cpu/arm7tdmi_gba/ldscripts/arm7tdmi_gba.ld b/cpu/arm7tdmi_gba/ldscripts/arm7tdmi_gba.ld
new file mode 100644
index 0000000000..98c91d1fff
--- /dev/null
+++ b/cpu/arm7tdmi_gba/ldscripts/arm7tdmi_gba.ld
@@ -0,0 +1,213 @@
+/*
+ * Copyright 2013, Freie Universitaet Berlin (FUB). All rights reserved.
+ *           2024, HAW Hamburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+MEMORY {
+    ewram : ORIGIN = 0x2000000, LENGTH = 256K /* on board ram, slower */
+    ram (w!rx) : ORIGIN = 0x3000000, LENGTH = 32K /* on chip ram, faster */
+    rom (rx)  : ORIGIN = 0x8000000, LENGTH = 32M /* on cartridge */
+}
+
+
+SECTIONS
+{
+    .text :
+    {
+        KEEP(*(.gbaheader))
+        . = ALIGN(4);
+        KEEP(*(.init))
+        . = ALIGN(4);
+        KEEP(*(.init0))                 /* Start here after reset.  */
+        . = ALIGN(4);
+        *(.text .text.* .gnu.linkonce.t.*)
+        *(.glue_7t) *(.glue_7)
+        . = ALIGN(4);
+        *(.rodata .rodata* .gnu.linkonce.r.*)
+        *(.ARM.extab* .gnu.linkonce.armextab.*)
+
+        /* Support C constructors, and C destructors in both user code
+           and the C library. This also provides support for C++ code. */
+        . = ALIGN(4);
+        KEEP(*(.init))
+        . = ALIGN(4);
+        __preinit_array_start = .;
+        KEEP (*(.preinit_array))
+        __preinit_array_end = .;
+
+        . = ALIGN(4);
+        __init_array_start = .;
+        KEEP (*(SORT(.init_array.*)))
+        KEEP (*(.init_array))
+        __init_array_end = .;
+
+        . = ALIGN(0x4);
+        KEEP (*crtbegin.o(.ctors))
+        KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+        KEEP (*(SORT(.ctors.*)))
+        KEEP (*crtend.o(.ctors))
+
+        . = ALIGN(4);
+        KEEP(*(.fini))
+
+        . = ALIGN(4);
+        __fini_array_start = .;
+        KEEP (*(.fini_array))
+        KEEP (*(SORT(.fini_array.*)))
+        __fini_array_end = .;
+
+        KEEP (*crtbegin.o(.dtors))
+        KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+        KEEP (*(SORT(.dtors.*)))
+        KEEP (*crtend.o(.dtors))
+        KEEP (*(SORT(.roxfa.*)))
+
+        . = ALIGN(4);
+        _efixed = .;            /* End of text section */
+    } > rom
+
+    /*
+     * TLS relocations are offsets relative to the address
+     * of the first TLS symbol. That means we just need to
+     * allocate them all together so that the TLS region
+     * is compact when allocated for each thread.
+     */
+
+    /*
+     * TLS initialization data is loaded into ROM so that
+     * each thread can get its values initialized from there
+     * at startup
+     */
+    .tdata :
+    {
+         __tdata_start = .;
+        *(.tdata .tdata.* .gnu.linkonce.td.*)
+        __tdata_end = .;
+    } > rom
+    __tdata_source = LOADADDR(.tdata);
+    __tdata_size = SIZEOF(.tdata);
+
+    /*
+     * TLS zeroed data is relocated as if it immediately followed
+     * the tdata values. However, the linker 'magically' erases the
+     * memory allocation so that no ROM is consumed by this
+     * section
+     */
+    .tbss :
+    {
+        *(.tbss .tbss.* .gnu.linkonce.tb.*)
+        *(.tcommon)
+        __tbss_end = .;
+    } > rom
+    __tls_size = __tbss_end - __tdata_start;
+    __tbss_size = __tls_size - __tdata_size;
+
+    /* .ARM.exidx is sorted, so has to go in its own output section.  */
+    PROVIDE_HIDDEN (__exidx_start = .);
+    .ARM.exidx :
+    {
+      *(.ARM.exidx* .gnu.linkonce.armexidx.*)
+    } > rom
+    PROVIDE_HIDDEN (__exidx_end = .);
+
+    /* exception handling */
+    . = ALIGN(4);
+    .eh_frame :
+    {
+        KEEP (*(.eh_frame))
+    } > rom
+
+    . = ALIGN(4);
+    _etext = .;
+
+/**************************************************************************
+ * RAM
+ **************************************************************************/
+
+    /*
+     * Stacks
+     */
+    .stack (NOLOAD) :
+    {
+        PROVIDE(__stack_start = .);
+        KEEP (*(.usr_stack))
+        __stack_usr_start = .;
+        KEEP (*(.und_stack))
+        __stack_und_start = .;
+        KEEP (*(.fiq_stack))
+        __stack_fiq_start = .;
+        KEEP (*(.irq_stack))
+        __stack_irq_start = .;
+        KEEP (*(.abt_stack))
+        __stack_abt_start = .;
+        KEEP (*(.svc_stack))
+        __stack_svc_start = .;
+
+        PROVIDE(__stack_end = .);
+    } > ram
+
+    .relocate :
+    {
+        . = ALIGN(4);
+        _srelocate = .;
+        *(.ramfunc .ramfunc.*);
+        *(.data .data.*);
+        KEEP (*(.openocd .openocd.*))
+        KEEP (*(SORT(.xfa.*)))
+        . = ALIGN(4);
+        _erelocate = .;
+    } > ram AT> rom
+
+    /* .bss section which is used for uninitialized data */
+    .bss (NOLOAD) :
+    {
+        . = ALIGN(4);
+        _sbss = . ;
+        _szero = .;
+        *(.bss .bss.*)
+        *(COMMON)
+        . = ALIGN(4);
+        _ebss = . ;
+        _ezero = .;
+    } > ram
+
+    /*
+     * collect all uninitialized sections that go into RAM
+     */
+    .noinit (NOLOAD) :
+    {
+        __noinit_start = .;
+        PROVIDE(__fiq_handler = .);
+        *(.fiq)
+        *(.noinit)
+        . = ALIGN(4);
+        __noinit_end = .;
+    }  > ram
+
+    /* heap section */
+    . = ALIGN(4);
+    _sheap = . ;
+    _eheap = ORIGIN(ram) + LENGTH(ram);
+
+    .heap1 ALIGN(4) (NOLOAD) :
+    {
+        _sheap1 = ORIGIN(ewram);
+        _eheap1 = ORIGIN(ewram) + LENGTH(ewram);
+    } > ewram
+
+    /* Populate information about ram size */
+    _sram = ORIGIN(ram);
+    _eram = ORIGIN(ram) + LENGTH(ram);
+
+    /* Populate information about rom size */
+    _srom = ORIGIN(rom);
+    _erom = ORIGIN(rom) + LENGTH(rom);
+
+    .end_fw (NOLOAD) : ALIGN(4) {
+        _end_fw = . ;
+    } > rom
+}
diff --git a/cpu/arm7tdmi_gba/startup.s b/cpu/arm7tdmi_gba/startup.s
new file mode 100644
index 0000000000..a1aca76fa2
--- /dev/null
+++ b/cpu/arm7tdmi_gba/startup.s
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2023 HAW Hamburg
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/* ***************************************************************************************************************
+
+    startup.s                       STARTUP  ASSEMBLY  CODE
+                                    -----------------------
+
+
+    Module includes the interrupt vectors and start-up code.
+
+  *************************************************************************************************************** */
+.extern __start_start
+.extern __stack_end
+.extern __fiq_handler
+
+/* Stack Positions */
+.extern __stack_usr_start
+.extern __stack_abt_start
+.extern __stack_und_start
+.extern __stack_fiq_start
+.extern __start_irq_start
+.extern __start_svc_start
+
+/* Standard definitions of Mode bits and Interrupt (I & F) flags in PSRs (program status registers) */
+.set  MODE_USR, 0x10                    /* Normal User Mode                                         */
+.set  MODE_FIQ, 0x11                    /* FIQ Processing Fast Interrupts Mode                      */
+.set  MODE_IRQ, 0x12                    /* IRQ Processing Standard Interrupts Mode                  */
+.set  MODE_SVC, 0x13                    /* Supervisor Processing Software Interrupts Mode           */
+.set  MODE_ABT, 0x17                    /* Abort Processing memory Faults Mode                      */
+.set  MODE_UND, 0x1B                    /* Undefined Processing Undefined Instructions Mode         */
+.set  MODE_SYS, 0x1F                    /* System Running Priviledged Operating System Tasks  Mode  */
+
+.set  I_BIT, 0x80                       /* when I bit is set, IRQ is disabled (program status registers) */
+.set  F_BIT, 0x40                       /* when F bit is set, FIQ is disabled (program status registers) */
+
+.set  REG_IME, 0x4000208
+
+.text
+.arm
+
+
+/* Begin of boot code */
+.text
+.arm
+.section .init
+.global _startup
+.func   _startup
+
+_startup:
+                ldr    pc, =reset_handler
+
+/*.func reset_handler */
+reset_handler:
+
+.section .init0
+                /* Disable interrupts using the GBA control reg */
+                ldr r0, =REG_IME
+                mov r1, #0
+                strh r1, [r0]
+
+                /* Setup a stack for each mode - note that this only sets up a usable stack
+                for User mode.   Also each mode is setup with interrupts initially disabled. */
+                ldr   r0, = __stack_end
+                msr   CPSR_c, #MODE_UND|I_BIT|F_BIT     /* Undefined Instruction Mode  */
+                ldr   sp, =__stack_und_start
+                msr   CPSR_c, #MODE_ABT|I_BIT|F_BIT     /* Abort Mode */
+                ldr   sp, =__stack_abt_start
+                msr   CPSR_c, #MODE_FIQ|I_BIT|F_BIT     /* FIQ Mode */
+                ldr   sp, =__stack_fiq_start
+                msr   CPSR_c, #MODE_IRQ|I_BIT|F_BIT     /* IRQ Mode */
+                ldr   sp, =__stack_irq_start
+                msr   CPSR_c, #MODE_SVC|I_BIT|F_BIT     /* Supervisor Mode */
+                ldr   sp, =__stack_svc_start
+                msr   CPSR_c, #MODE_SYS|I_BIT|F_BIT     /* User Mode */
+                ldr   sp, =__stack_usr_start
+
+                bl  bootloader
+                b   kernel_init
+
+                /* Infinite Loop */
+.section .fini0
+__main_exit:    B   __main_exit
+
+
+.endfunc
+.end
diff --git a/cpu/arm7tdmi_gba/stdio_fb/Makefile b/cpu/arm7tdmi_gba/stdio_fb/Makefile
new file mode 100644
index 0000000000..48422e909a
--- /dev/null
+++ b/cpu/arm7tdmi_gba/stdio_fb/Makefile
@@ -0,0 +1 @@
+include $(RIOTBASE)/Makefile.base
diff --git a/cpu/arm7tdmi_gba/stdio_fb/font_terminal.h b/cpu/arm7tdmi_gba/stdio_fb/font_terminal.h
new file mode 100644
index 0000000000..0ae779239a
--- /dev/null
+++ b/cpu/arm7tdmi_gba/stdio_fb/font_terminal.h
@@ -0,0 +1,286 @@
+#ifndef FONT_TERMINAL_H
+#define FONT_TERMINAL_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#define FONT_WIDTH 8
+#define FONT_HEIGHT 8
+#define FONT_VMIRROR 1
+/*
+   https://github.com/dhepper/font8x8
+   ; Summary: font8_8.asm
+   ; 8x8 monochrome bitmap fonts for rendering
+   ;
+   ; Author:
+   ;     Marcel Sondaar
+   ;     International Business Machines (public domain VGA fonts)
+   ;
+   ; License:
+   ;     Public Domain
+   ;
+ */
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0000 (nul)
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0001
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0002
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0003
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0004
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0005
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0006
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0007
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0008
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0009
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+000A
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+000B
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+000C
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+000D
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+000E
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+000F
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0010
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0011
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0012
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0013
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0014
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0015
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0016
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0017
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0018
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0019
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+001A
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+001B
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+001C
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+001D
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+001E
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+001F
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0020 (space)
+0x18, 0x3C, 0x3C, 0x18, 0x18, 0x00, 0x18, 0x00,     // U+0021 (!)
+0x36, 0x36, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0022 (")
+0x36, 0x36, 0x7F, 0x36, 0x7F, 0x36, 0x36, 0x00,     // U+0023 (#)
+0x0C, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x0C, 0x00,     // U+0024 ($)
+0x00, 0x63, 0x33, 0x18, 0x0C, 0x66, 0x63, 0x00,     // U+0025 (%)
+0x1C, 0x36, 0x1C, 0x6E, 0x3B, 0x33, 0x6E, 0x00,     // U+0026 (&)
+0x06, 0x06, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0027 (')
+0x18, 0x0C, 0x06, 0x06, 0x06, 0x0C, 0x18, 0x00,     // U+0028 (()
+0x06, 0x0C, 0x18, 0x18, 0x18, 0x0C, 0x06, 0x00,     // U+0029 ())
+0x00, 0x66, 0x3C, 0xFF, 0x3C, 0x66, 0x00, 0x00,     // U+002A (*)
+0x00, 0x0C, 0x0C, 0x3F, 0x0C, 0x0C, 0x00, 0x00,     // U+002B (+)
+0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x06,     // U+002C (,)
+0x00, 0x00, 0x00, 0x3F, 0x00, 0x00, 0x00, 0x00,     // U+002D (-)
+0x00, 0x00, 0x00, 0x00, 0x00, 0x0C, 0x0C, 0x00,     // U+002E (.)
+0x60, 0x30, 0x18, 0x0C, 0x06, 0x03, 0x01, 0x00,     // U+002F (/)
+0x3E, 0x63, 0x73, 0x7B, 0x6F, 0x67, 0x3E, 0x00,     // U+0030 (0)
+0x0C, 0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x3F, 0x00,     // U+0031 (1)
+0x1E, 0x33, 0x30, 0x1C, 0x06, 0x33, 0x3F, 0x00,     // U+0032 (2)
+0x1E, 0x33, 0x30, 0x1C, 0x30, 0x33, 0x1E, 0x00,     // U+0033 (3)
+0x38, 0x3C, 0x36, 0x33, 0x7F, 0x30, 0x78, 0x00,     // U+0034 (4)
+0x3F, 0x03, 0x1F, 0x30, 0x30, 0x33, 0x1E, 0x00,     // U+0035 (5)
+0x1C, 0x06, 0x03, 0x1F, 0x33, 0x33, 0x1E, 0x00,     // U+0036 (6)
+0x3F, 0x33, 0x30, 0x18, 0x0C, 0x0C, 0x0C, 0x00,     // U+0037 (7)
+0x1E, 0x33, 0x33, 0x1E, 0x33, 0x33, 0x1E, 0x00,     // U+0038 (8)
+0x1E, 0x33, 0x33, 0x3E, 0x30, 0x18, 0x0E, 0x00,     // U+0039 (9)
+0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x00,     // U+003A (:)
+0x00, 0x0C, 0x0C, 0x00, 0x00, 0x0C, 0x0C, 0x06,     // U+003B (//)
+0x18, 0x0C, 0x06, 0x03, 0x06, 0x0C, 0x18, 0x00,     // U+003C (<)
+0x00, 0x00, 0x3F, 0x00, 0x00, 0x3F, 0x00, 0x00,     // U+003D (=)
+0x06, 0x0C, 0x18, 0x30, 0x18, 0x0C, 0x06, 0x00,     // U+003E (>)
+0x1E, 0x33, 0x30, 0x18, 0x0C, 0x00, 0x0C, 0x00,     // U+003F (?)
+0x3E, 0x63, 0x7B, 0x7B, 0x7B, 0x03, 0x1E, 0x00,     // U+0040 (@)
+0x0C, 0x1E, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x00,     // U+0041 (A)
+0x3F, 0x66, 0x66, 0x3E, 0x66, 0x66, 0x3F, 0x00,     // U+0042 (B)
+0x3C, 0x66, 0x03, 0x03, 0x03, 0x66, 0x3C, 0x00,     // U+0043 (C)
+0x1F, 0x36, 0x66, 0x66, 0x66, 0x36, 0x1F, 0x00,     // U+0044 (D)
+0x7F, 0x46, 0x16, 0x1E, 0x16, 0x46, 0x7F, 0x00,     // U+0045 (E)
+0x7F, 0x46, 0x16, 0x1E, 0x16, 0x06, 0x0F, 0x00,     // U+0046 (F)
+0x3C, 0x66, 0x03, 0x03, 0x73, 0x66, 0x7C, 0x00,     // U+0047 (G)
+0x33, 0x33, 0x33, 0x3F, 0x33, 0x33, 0x33, 0x00,     // U+0048 (H)
+0x1E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+0049 (I)
+0x78, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E, 0x00,     // U+004A (J)
+0x67, 0x66, 0x36, 0x1E, 0x36, 0x66, 0x67, 0x00,     // U+004B (K)
+0x0F, 0x06, 0x06, 0x06, 0x46, 0x66, 0x7F, 0x00,     // U+004C (L)
+0x63, 0x77, 0x7F, 0x7F, 0x6B, 0x63, 0x63, 0x00,     // U+004D (M)
+0x63, 0x67, 0x6F, 0x7B, 0x73, 0x63, 0x63, 0x00,     // U+004E (N)
+0x1C, 0x36, 0x63, 0x63, 0x63, 0x36, 0x1C, 0x00,     // U+004F (O)
+0x3F, 0x66, 0x66, 0x3E, 0x06, 0x06, 0x0F, 0x00,     // U+0050 (P)
+0x1E, 0x33, 0x33, 0x33, 0x3B, 0x1E, 0x38, 0x00,     // U+0051 (Q)
+0x3F, 0x66, 0x66, 0x3E, 0x36, 0x66, 0x67, 0x00,     // U+0052 (R)
+0x1E, 0x33, 0x07, 0x0E, 0x38, 0x33, 0x1E, 0x00,     // U+0053 (S)
+0x3F, 0x2D, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+0054 (T)
+0x33, 0x33, 0x33, 0x33, 0x33, 0x33, 0x3F, 0x00,     // U+0055 (U)
+0x33, 0x33, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00,     // U+0056 (V)
+0x63, 0x63, 0x63, 0x6B, 0x7F, 0x77, 0x63, 0x00,     // U+0057 (W)
+0x63, 0x63, 0x36, 0x1C, 0x1C, 0x36, 0x63, 0x00,     // U+0058 (X)
+0x33, 0x33, 0x33, 0x1E, 0x0C, 0x0C, 0x1E, 0x00,     // U+0059 (Y)
+0x7F, 0x63, 0x31, 0x18, 0x4C, 0x66, 0x7F, 0x00,     // U+005A (Z)
+0x1E, 0x06, 0x06, 0x06, 0x06, 0x06, 0x1E, 0x00,     // U+005B ([)
+0x03, 0x06, 0x0C, 0x18, 0x30, 0x60, 0x40, 0x00,     // U+005C (\)
+0x1E, 0x18, 0x18, 0x18, 0x18, 0x18, 0x1E, 0x00,     // U+005D (])
+0x08, 0x1C, 0x36, 0x63, 0x00, 0x00, 0x00, 0x00,     // U+005E (^)
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xFF,     // U+005F (_)
+0x0C, 0x0C, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0060 (`)
+0x00, 0x00, 0x1E, 0x30, 0x3E, 0x33, 0x6E, 0x00,     // U+0061 (a)
+0x07, 0x06, 0x06, 0x3E, 0x66, 0x66, 0x3B, 0x00,     // U+0062 (b)
+0x00, 0x00, 0x1E, 0x33, 0x03, 0x33, 0x1E, 0x00,     // U+0063 (c)
+0x38, 0x30, 0x30, 0x3e, 0x33, 0x33, 0x6E, 0x00,     // U+0064 (d)
+0x00, 0x00, 0x1E, 0x33, 0x3f, 0x03, 0x1E, 0x00,     // U+0065 (e)
+0x1C, 0x36, 0x06, 0x0f, 0x06, 0x06, 0x0F, 0x00,     // U+0066 (f)
+0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x1F,     // U+0067 (g)
+0x07, 0x06, 0x36, 0x6E, 0x66, 0x66, 0x67, 0x00,     // U+0068 (h)
+0x0C, 0x00, 0x0E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+0069 (i)
+0x30, 0x00, 0x30, 0x30, 0x30, 0x33, 0x33, 0x1E,     // U+006A (j)
+0x07, 0x06, 0x66, 0x36, 0x1E, 0x36, 0x67, 0x00,     // U+006B (k)
+0x0E, 0x0C, 0x0C, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+006C (l)
+0x00, 0x00, 0x33, 0x7F, 0x7F, 0x6B, 0x63, 0x00,     // U+006D (m)
+0x00, 0x00, 0x1F, 0x33, 0x33, 0x33, 0x33, 0x00,     // U+006E (n)
+0x00, 0x00, 0x1E, 0x33, 0x33, 0x33, 0x1E, 0x00,     // U+006F (o)
+0x00, 0x00, 0x3B, 0x66, 0x66, 0x3E, 0x06, 0x0F,     // U+0070 (p)
+0x00, 0x00, 0x6E, 0x33, 0x33, 0x3E, 0x30, 0x78,     // U+0071 (q)
+0x00, 0x00, 0x3B, 0x6E, 0x66, 0x06, 0x0F, 0x00,     // U+0072 (r)
+0x00, 0x00, 0x3E, 0x03, 0x1E, 0x30, 0x1F, 0x00,     // U+0073 (s)
+0x08, 0x0C, 0x3E, 0x0C, 0x0C, 0x2C, 0x18, 0x00,     // U+0074 (t)
+0x00, 0x00, 0x33, 0x33, 0x33, 0x33, 0x6E, 0x00,     // U+0075 (u)
+0x00, 0x00, 0x33, 0x33, 0x33, 0x1E, 0x0C, 0x00,     // U+0076 (v)
+0x00, 0x00, 0x63, 0x6B, 0x7F, 0x7F, 0x36, 0x00,     // U+0077 (w)
+0x00, 0x00, 0x63, 0x36, 0x1C, 0x36, 0x63, 0x00,     // U+0078 (x)
+0x00, 0x00, 0x33, 0x33, 0x33, 0x3E, 0x30, 0x1F,     // U+0079 (y)
+0x00, 0x00, 0x3F, 0x19, 0x0C, 0x26, 0x3F, 0x00,     // U+007A (z)
+0x38, 0x0C, 0x0C, 0x07, 0x0C, 0x0C, 0x38, 0x00,     // U+007B ({)
+0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00,     // U+007C (|)
+0x07, 0x0C, 0x0C, 0x38, 0x0C, 0x0C, 0x07, 0x00,     // U+007D (})
+0x6E, 0x3B, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+007E (~)
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+007F
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0080
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0081
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0082
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0083
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0084
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0085
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0086
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0087
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0088
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0089
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+008A
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+008B
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+008C
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+008D
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+008E
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+008F
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0090
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0091
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0092
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0093
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0094
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0095
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0096
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0097
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0098
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+0099
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+009A
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+009B
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+009C
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+009D
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+009E
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+009F
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+00A0 (no break space)
+0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x18, 0x00,     // U+00A1 (inverted !)
+0x18, 0x18, 0x7E, 0x03, 0x03, 0x7E, 0x18, 0x18,     // U+00A2 (dollarcents)
+0x1C, 0x36, 0x26, 0x0F, 0x06, 0x67, 0x3F, 0x00,     // U+00A3 (pound sterling)
+0x00, 0x00, 0x63, 0x3E, 0x36, 0x3E, 0x63, 0x00,     // U+00A4 (currency mark)
+0x33, 0x33, 0x1E, 0x3F, 0x0C, 0x3F, 0x0C, 0x0C,     // U+00A5 (yen)
+0x18, 0x18, 0x18, 0x00, 0x18, 0x18, 0x18, 0x00,     // U+00A6 (broken pipe)
+0x7C, 0xC6, 0x1C, 0x36, 0x36, 0x1C, 0x33, 0x1E,     // U+00A7 (paragraph)
+0x33, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+00A8 (diaeresis)
+0x3C, 0x42, 0x99, 0x85, 0x85, 0x99, 0x42, 0x3C,     // U+00A9 (copyright symbol)
+0x3C, 0x36, 0x36, 0x7C, 0x00, 0x00, 0x00, 0x00,     // U+00AA (superscript a)
+0x00, 0xCC, 0x66, 0x33, 0x66, 0xCC, 0x00, 0x00,     // U+00AB (<<)
+0x00, 0x00, 0x00, 0x3F, 0x30, 0x30, 0x00, 0x00,     // U+00AC (gun pointing left)
+0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+00AD (soft hyphen)
+0x3C, 0x42, 0x9D, 0xA5, 0x9D, 0xA5, 0x42, 0x3C,     // U+00AE (registered symbol)
+0x7E, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+00AF (macron)
+0x1C, 0x36, 0x36, 0x1C, 0x00, 0x00, 0x00, 0x00,     // U+00B0 (degree)
+0x18, 0x18, 0x7E, 0x18, 0x18, 0x00, 0x7E, 0x00,     // U+00B1 (plusminus)
+0x1C, 0x30, 0x18, 0x0C, 0x3C, 0x00, 0x00, 0x00,     // U+00B2 (superscript 2)
+0x1C, 0x30, 0x18, 0x30, 0x1C, 0x00, 0x00, 0x00,     // U+00B2 (superscript 3)
+0x18, 0x0C, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,     // U+00B2 (aigu)
+0x00, 0x00, 0x66, 0x66, 0x66, 0x3E, 0x06, 0x03,     // U+00B5 (mu)
+0xFE, 0xDB, 0xDB, 0xDE, 0xD8, 0xD8, 0xD8, 0x00,     // U+00B6 (pilcrow)
+0x00, 0x00, 0x00, 0x18, 0x18, 0x00, 0x00, 0x00,     // U+00B7 (central dot)
+0x00, 0x00, 0x00, 0x00, 0x00, 0x18, 0x30, 0x1E,     // U+00B8 (cedille)
+0x08, 0x0C, 0x08, 0x1C, 0x00, 0x00, 0x00, 0x00,     // U+00B9 (superscript 1)
+0x1C, 0x36, 0x36, 0x1C, 0x00, 0x00, 0x00, 0x00,     // U+00BA (superscript 0)
+0x00, 0x33, 0x66, 0xCC, 0x66, 0x33, 0x00, 0x00,     // U+00BB (>>)
+0xC3, 0x63, 0x33, 0xBD, 0xEC, 0xF6, 0xF3, 0x03,     // U+00BC (1/4)
+0xC3, 0x63, 0x33, 0x7B, 0xCC, 0x66, 0x33, 0xF0,     // U+00BD (1/2)
+0x03, 0xC4, 0x63, 0xB4, 0xDB, 0xAC, 0xE6, 0x80,     // U+00BE (3/4)
+0x0C, 0x00, 0x0C, 0x06, 0x03, 0x33, 0x1E, 0x00,     // U+00BF (inverted ?)
+0x07, 0x00, 0x1C, 0x36, 0x63, 0x7F, 0x63, 0x00,     // U+00C0 (A grave)
+0x70, 0x00, 0x1C, 0x36, 0x63, 0x7F, 0x63, 0x00,     // U+00C1 (A aigu)
+0x1C, 0x36, 0x00, 0x3E, 0x63, 0x7F, 0x63, 0x00,     // U+00C2 (A circumflex)
+0x6E, 0x3B, 0x00, 0x3E, 0x63, 0x7F, 0x63, 0x00,     // U+00C3 (A ~)
+0x63, 0x1C, 0x36, 0x63, 0x7F, 0x63, 0x63, 0x00,     // U+00C4 (A umlaut)
+0x0C, 0x0C, 0x00, 0x1E, 0x33, 0x3F, 0x33, 0x00,     // U+00C5 (A ring)
+0x7C, 0x36, 0x33, 0x7F, 0x33, 0x33, 0x73, 0x00,     // U+00C6 (AE)
+0x1E, 0x33, 0x03, 0x33, 0x1E, 0x18, 0x30, 0x1E,     // U+00C7 (C cedille)
+0x07, 0x00, 0x3F, 0x06, 0x1E, 0x06, 0x3F, 0x00,     // U+00C8 (E grave)
+0x38, 0x00, 0x3F, 0x06, 0x1E, 0x06, 0x3F, 0x00,     // U+00C9 (E aigu)
+0x0C, 0x12, 0x3F, 0x06, 0x1E, 0x06, 0x3F, 0x00,     // U+00CA (E circumflex)
+0x36, 0x00, 0x3F, 0x06, 0x1E, 0x06, 0x3F, 0x00,     // U+00CB (E umlaut)
+0x07, 0x00, 0x1E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+00CC (I grave)
+0x38, 0x00, 0x1E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+00CD (I aigu)
+0x0C, 0x12, 0x00, 0x1E, 0x0C, 0x0C, 0x1E, 0x00,     // U+00CE (I circumflex)
+0x33, 0x00, 0x1E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+00CF (I umlaut)
+0x3F, 0x66, 0x6F, 0x6F, 0x66, 0x66, 0x3F, 0x00,     // U+00D0 (Eth)
+0x3F, 0x00, 0x33, 0x37, 0x3F, 0x3B, 0x33, 0x00,     // U+00D1 (N ~)
+0x0E, 0x00, 0x18, 0x3C, 0x66, 0x3C, 0x18, 0x00,     // U+00D2 (O grave)
+0x70, 0x00, 0x18, 0x3C, 0x66, 0x3C, 0x18, 0x00,     // U+00D3 (O aigu)
+0x3C, 0x66, 0x18, 0x3C, 0x66, 0x3C, 0x18, 0x00,     // U+00D4 (O circumflex)
+0x6E, 0x3B, 0x00, 0x3E, 0x63, 0x63, 0x3E, 0x00,     // U+00D5 (O ~)
+0xC3, 0x18, 0x3C, 0x66, 0x66, 0x3C, 0x18, 0x00,     // U+00D6 (O umlaut)
+0x00, 0x36, 0x1C, 0x08, 0x1C, 0x36, 0x00, 0x00,     // U+00D7 (multiplicative x)
+0x5C, 0x36, 0x73, 0x7B, 0x6F, 0x36, 0x1D, 0x00,     // U+00D8 (O stroke)
+0x0E, 0x00, 0x66, 0x66, 0x66, 0x66, 0x3C, 0x00,     // U+00D9 (U grave)
+0x70, 0x00, 0x66, 0x66, 0x66, 0x66, 0x3C, 0x00,     // U+00DA (U aigu)
+0x3C, 0x66, 0x00, 0x66, 0x66, 0x66, 0x3C, 0x00,     // U+00DB (U circumflex)
+0x33, 0x00, 0x33, 0x33, 0x33, 0x33, 0x1E, 0x00,     // U+00DC (U umlaut)
+0x70, 0x00, 0x66, 0x66, 0x3C, 0x18, 0x18, 0x00,     // U+00DD (Y aigu)
+0x0F, 0x06, 0x3E, 0x66, 0x66, 0x3E, 0x06, 0x0F,     // U+00DE (Thorn)
+0x00, 0x1E, 0x33, 0x1F, 0x33, 0x1F, 0x03, 0x03,     // U+00DF (beta)
+0x07, 0x00, 0x1E, 0x30, 0x3E, 0x33, 0x7E, 0x00,     // U+00E0 (a grave)
+0x38, 0x00, 0x1E, 0x30, 0x3E, 0x33, 0x7E, 0x00,     // U+00E1 (a aigu)
+0x7E, 0xC3, 0x3C, 0x60, 0x7C, 0x66, 0xFC, 0x00,     // U+00E2 (a circumflex)
+0x6E, 0x3B, 0x1E, 0x30, 0x3E, 0x33, 0x7E, 0x00,     // U+00E3 (a ~)
+0x33, 0x00, 0x1E, 0x30, 0x3E, 0x33, 0x7E, 0x00,     // U+00E4 (a umlaut)
+0x0C, 0x0C, 0x1E, 0x30, 0x3E, 0x33, 0x7E, 0x00,     // U+00E5 (a ring)
+0x00, 0x00, 0xFE, 0x30, 0xFE, 0x33, 0xFE, 0x00,     // U+00E6 (ae)
+0x00, 0x00, 0x1E, 0x03, 0x03, 0x1E, 0x30, 0x1C,     // U+00E7 (c cedille)
+0x07, 0x00, 0x1E, 0x33, 0x3F, 0x03, 0x1E, 0x00,     // U+00E8 (e grave)
+0x38, 0x00, 0x1E, 0x33, 0x3F, 0x03, 0x1E, 0x00,     // U+00E9 (e aigu)
+0x7E, 0xC3, 0x3C, 0x66, 0x7E, 0x06, 0x3C, 0x00,     // U+00EA (e circumflex)
+0x33, 0x00, 0x1E, 0x33, 0x3F, 0x03, 0x1E, 0x00,     // U+00EB (e umlaut)
+0x07, 0x00, 0x0E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+00EC (i grave)
+0x1C, 0x00, 0x0E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+00ED (i augu)
+0x3E, 0x63, 0x1C, 0x18, 0x18, 0x18, 0x3C, 0x00,     // U+00EE (i circumflex)
+0x33, 0x00, 0x0E, 0x0C, 0x0C, 0x0C, 0x1E, 0x00,     // U+00EF (i umlaut)
+0x1B, 0x0E, 0x1B, 0x30, 0x3E, 0x33, 0x1E, 0x00,     // U+00F0 (eth)
+0x00, 0x1F, 0x00, 0x1F, 0x33, 0x33, 0x33, 0x00,     // U+00F1 (n ~)
+0x00, 0x07, 0x00, 0x1E, 0x33, 0x33, 0x1E, 0x00,     // U+00F2 (o grave)
+0x00, 0x38, 0x00, 0x1E, 0x33, 0x33, 0x1E, 0x00,     // U+00F3 (o aigu)
+0x1E, 0x33, 0x00, 0x1E, 0x33, 0x33, 0x1E, 0x00,     // U+00F4 (o circumflex)
+0x6E, 0x3B, 0x00, 0x1E, 0x33, 0x33, 0x1E, 0x00,     // U+00F5 (o ~)
+0x00, 0x33, 0x00, 0x1E, 0x33, 0x33, 0x1E, 0x00,     // U+00F6 (o umlaut)
+0x18, 0x18, 0x00, 0x7E, 0x00, 0x18, 0x18, 0x00,     // U+00F7 (division)
+0x00, 0x60, 0x3C, 0x76, 0x7E, 0x6E, 0x3C, 0x06,     // U+00F8 (o stroke)
+0x00, 0x07, 0x00, 0x33, 0x33, 0x33, 0x7E, 0x00,     // U+00F9 (u grave)
+0x00, 0x38, 0x00, 0x33, 0x33, 0x33, 0x7E, 0x00,     // U+00FA (u aigu)
+0x1E, 0x33, 0x00, 0x33, 0x33, 0x33, 0x7E, 0x00,     // U+00FB (u circumflex)
+0x00, 0x33, 0x00, 0x33, 0x33, 0x33, 0x7E, 0x00,     // U+00FC (u umlaut)
+0x00, 0x38, 0x00, 0x33, 0x33, 0x3E, 0x30, 0x1F,     // U+00FD (y aigu)
+0x00, 0x00, 0x06, 0x3E, 0x66, 0x3E, 0x06, 0x00,     // U+00FE (thorn)
+0x00, 0x33, 0x00, 0x33, 0x33, 0x3E, 0x30, 0x1F,     // U+00FF (y umlaut)
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* FONT_TERMINAL_H */
diff --git a/cpu/arm7tdmi_gba/stdio_fb/stdio_fb.c b/cpu/arm7tdmi_gba/stdio_fb/stdio_fb.c
new file mode 100644
index 0000000000..f4674fba16
--- /dev/null
+++ b/cpu/arm7tdmi_gba/stdio_fb/stdio_fb.c
@@ -0,0 +1,113 @@
+/*
+ * Copyright (C) 2023 Bennet Blischke <bennet.blischke@haw-hamburg.de>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @ingroup     boards_gba_stdio_fb
+ * @{
+ *
+ * @file
+ * @brief       STDIO framebuffer driver
+ *
+ * This file provides a framebuffer driver for STDIO, implementing stdout only.
+ *
+ * @author      Bennet Blischke <bennet.blischke@haw-hamburg.de>
+ *
+ * @}
+ */
+
+#include "stdio_base.h"
+#include "periph_gba.h"
+
+#include <string.h>
+
+static const unsigned char systemFont[] =
+{
+#include "font_terminal.h"
+};
+
+#define BLACK 0x0000
+#define WHITE 0x7FFF
+
+static void clearScreen(void)
+{
+    /* width * height * two byte per pixel */
+    memset(GBA_VRAM, 0x00, GBA_SCREEN_WIDTH * GBA_SCREEN_HEIGHT * 2);
+}
+
+static void drawPixel(unsigned short x, unsigned short y, unsigned short color)
+{
+    GBA_VRAM[x + y * GBA_SCREEN_WIDTH] = color;
+}
+
+static void drawChar(unsigned char c, int x, int y, unsigned short fgColour,
+                     unsigned short bgColour)
+{
+    unsigned char mask;
+    const unsigned char *font = systemFont + (c * FONT_HEIGHT);
+    unsigned short colourToDraw;
+
+    for (int h = 0; h < FONT_HEIGHT; h++) {
+        mask = 0x01;
+
+        /* This loop draws 8 pixels at most  / 1 byte per line */
+        for (int w = 0; w < FONT_WIDTH; w++) {
+            if ((*font) & mask) {
+                colourToDraw = fgColour;
+            }
+            else {
+                colourToDraw = bgColour;
+            }
+
+            drawPixel(x + w, y + h, colourToDraw);
+
+            mask <<= 1;
+        }
+        font++;
+    }
+}
+
+void stdio_init(void)
+{
+    /* setup bitmap mode */
+    GBA_DISPCNT = GBA_DISPCNT_BGMODE_3 | GBA_DISPCNT_SDBG_2;
+    clearScreen();
+}
+
+ssize_t stdio_read(void *buffer, size_t count)
+{
+    (void)buffer;
+    (void)count;
+    return 0;
+}
+
+ssize_t stdio_write(const void *buffer, size_t len)
+{
+    static unsigned short row = 0;
+    static unsigned short cursor = 0;
+
+    for (size_t i = 0; i < len; i++) {
+        if (cursor >= (GBA_SCREEN_WIDTH / FONT_WIDTH)) {
+            cursor = 0;
+            row++;
+        }
+        if (row >= (GBA_SCREEN_HEIGHT / FONT_HEIGHT)) {
+            clearScreen();
+            row = 0;
+        }
+        char c = ((char *)buffer)[i];
+        if (c == '\n') {
+            row++;
+            cursor = 0;
+            continue;
+        }
+
+        drawChar(c, cursor * FONT_WIDTH, row * FONT_HEIGHT, WHITE, BLACK);
+        cursor++;
+    }
+    return len;
+}
diff --git a/cpu/lpc23xx/include/cpu.h b/cpu/lpc23xx/include/cpu.h
index 506b3ec7a6..2a765943eb 100644
--- a/cpu/lpc23xx/include/cpu.h
+++ b/cpu/lpc23xx/include/cpu.h
@@ -57,16 +57,6 @@ bool install_irq(int IntNumber, void (*HandlerAddr)(void), int Priority);
 void gpio_init_ports(void);
 #endif
 
-/**
- * @brief   Returns the current content of the link register (lr)
- */
-static inline uintptr_t cpu_get_caller_pc(void)
-{
-    register uintptr_t lr_ptr;
-    __asm__ __volatile__("mov %0, lr" : "=r"(lr_ptr));
-    return lr_ptr;
-}
-
 /**
  * @brief   Returns true if the CPU woke from Deep Sleep
  */
diff --git a/features.yaml b/features.yaml
index a5ca873132..4ac9190fc1 100644
--- a/features.yaml
+++ b/features.yaml
@@ -276,6 +276,11 @@ groups:
         - name: cpu_qn908x
           help: The MCU is part of the NXP QN908x family
 
+      - title: Nintendo Grouping
+        features:
+        - name: cpu_arm7tdmi_gba
+          help: The MCU of the Game Boy Advance.
+
       - title: Raspberry Pi Grouping
         features:
         - name: cpu_rpx0xx
diff --git a/makefiles/features_existing.inc.mk b/makefiles/features_existing.inc.mk
index 85c42d6850..66fdfb684f 100644
--- a/makefiles/features_existing.inc.mk
+++ b/makefiles/features_existing.inc.mk
@@ -48,6 +48,7 @@ FEATURES_EXISTING := \
     cortexm_mpu \
     cortexm_svc \
     cpp \
+    cpu_arm7tdmi_gba \
     cpu_atmega1281 \
     cpu_atmega1284p \
     cpu_atmega128rfa1 \
diff --git a/makefiles/stdio.inc.mk b/makefiles/stdio.inc.mk
index bfbb9feb70..16ce5902f6 100644
--- a/makefiles/stdio.inc.mk
+++ b/makefiles/stdio.inc.mk
@@ -12,6 +12,7 @@ STDIO_MODULES = \
   stdio_telnet \
   stdio_tinyusb_cdc_acm \
   stdio_usb_serial_jtag \
+  stdio_fb \
   #
 
 STDIO_LEGACY_MODULES = \