Modify your game-and-watch-flashloader and game-and-watch-retro-go installations to allow flashing of flash memory chips 128Mb (16MB) or smaller

24bit_patch.sh

#!/bin/bash

# Attention! - This script is now obsolete with the latest build of game-and-watch-retro-go.

# This script will modify your game-and-watch-flashloader and game-and-watch-retro-go installation
# to only allow flashing of flash memory chips 128Mb (16MB) or smaller. You only need to run this IF
# you have run the 32bit_patch.sh file, even then, it's not required to flash smaller chips.

# This patch MUST be applied BEFORE you build flashloader!
# The patch must be run from the same directory containing the game-and-watch-retro-go folder and game-and-watch-flashloader folder.
# Get the latest updated patch here: https://gist.github.com/DNA64/5382263912f991023385b1f57bc2f63a


# Are we in the right place?
if ! test -d game-and-watch-flashloader; then
    echo "Error! - Cannot locate the game-and-watch-flashloader folder..."
    echo "Are you sure you're running this script in the right directory?"
    exit 1
fi

if ! test -d game-and-watch-retro-go; then
    echo "Error! - Cannot locate the game-and-watch-retro-go folder..."
    echo "Are you sure you're running this script in the right directory?"
    exit 1
fi

sed -i 's/HAL_OSPI_ADDRESS_32_BITS;/HAL_OSPI_ADDRESS_24_BITS;/' game-and-watch-flashloader/Core/Src/flash.c

sed -i 's/0xDC/0xD8/' game-and-watch-flashloader/Core/Src/flash.c
sed -i 's/0x5C/0x52/' game-and-watch-flashloader/Core/Src/flash.c
sed -i 's/0x21/0x20/' game-and-watch-flashloader/Core/Src/flash.c
sed -i 's/0x12/0x02/' game-and-watch-flashloader/Core/Src/flash.c
sed -i 's/0x3E/0x38/' game-and-watch-flashloader/Core/Src/flash.c
sed -i 's/0x0C/0x0B/' game-and-watch-flashloader/Core/Src/flash.c
sed -i 's/0xEC/0xEB/' game-and-watch-flashloader/Core/Src/flash.c

sed -i 's/uint32_t program_device_size = 26;/uint32_t program_device_size = 24;/' game-and-watch-flashloader/Core/Src/main.c

sed -i 's/EXTFLASH_SIZE ?= 67108864/EXTFLASH_SIZE ?= 16777216/' game-and-watch-retro-go/Makefile.common

sed -i 's/HAL_OSPI_ADDRESS_32_BITS;/HAL_OSPI_ADDRESS_24_BITS;/' game-and-watch-retro-go/Core/Src/gw_flash.c
sed -i 's/0xDC/0xD8/' game-and-watch-retro-go/Core/Src/gw_flash.c
sed -i 's/0x5C/0x52/' game-and-watch-retro-go/Core/Src/gw_flash.c
sed -i 's/0x21/0x20/' game-and-watch-retro-go/Core/Src/gw_flash.c
sed -i 's/0x12/0x02/' game-and-watch-retro-go/Core/Src/gw_flash.c
sed -i 's/0x3E/0x38/' game-and-watch-retro-go/Core/Src/gw_flash.c
sed -i 's/0x0C/0x0B/' game-and-watch-retro-go/Core/Src/gw_flash.c
sed -i 's/0xEC/0xEB/' game-and-watch-retro-go/Core/Src/gw_flash.c

sed -i 's/hospi1.Init.DeviceSize = 26/hospi1.Init.DeviceSize = 24/' game-and-watch-retro-go/Core/Src/main.c

echo "Abracadabra! All done!"
sleep 5