Raspberry Pi version of Haribote OS

What's this: This is Raspberry Pi porting of Haribote OS. This runs on Raspberry Pi B+ Rev 2.0. The link to original Haribote OS support page is here: http://hrb.osask.jp/ Details are in Wiki https://github.com/moizumi99/RPiHaribote/wiki

How to run:

• Copy your Raspberry Pi Raspbian OS boot directory to a new SD CARD. Only the FAT16 region that includes kernel.img need to be copied. Format needs to be FAT16.
• Then, overwrite kernel.img in the new SDCARD with the one in /bin directory.
• Copy "xxx.out" files to the same directory. Copy "xxx.org" files as well.
• Insert the SDCARD to your Raspberry PI B+, connect USB keryboard and mouse (please see the limitation section). And boot.

Keys

• Shift + F2 : create a new console
• tab: Switch console
• F11: Move up the window

Commands

• mem: displays memory size and free size
• dir: shows root directory
• start: start an application. wait for completion
• ncst: start an application, without waiting for completion
• langmode [0/1/2]: change language mode (0=English, 1=Japanse SJIS, 2=Japanese EUC)
• exit: exit console
• cls: clear console

Bundled applications

• type : display a text file content
• mmlplay <xxx.org>: play mml data
• tview : text viewer (see limitation)
• invader: a game which doesn't look too far from the old invader game
• bball: Show s a graphic demo
• calc : calculates equation
• there are some other small demo or debugging applications

Limitation:

• As CSUD is used for mouse and keyboard, this software only supports keyboard and mouse that is supported by CSUD. So far, I found wired keyboards and mice have high chance of being recognized
• SDCARD.c is tested with limited nubmer of cards.
• This version of Haribote has application compatibility with the original Haribote OS at c-code source level. The graphic viewer application that was bundled with the original Haribote is not included because of the assembler code.
• The extraction of compressed data in the original Haribote OS is not implemented yet.
• The support of ELF format used in the application is very rudimentary. Newly compiled application may not work. I am working on this.
• Only basic functionality of FAT16/32 is supported. For example, only the root level is visible.
• Only tested with my Raspberry PI B+ rev2.0 and Raspberry Pi Zero. It won't run on Pi2 or Pi3. Future extension is planned.