jdennes

# pre-commit.py:
#
# Performs the following:
#  - Makes sure the author has entered a log message.
#  - Makes sure the author is only creating a tag, or if deleting a tag, author is a specific user
#  - Makes sure the author is not committing to a particular set of paths in the repository
#
# Script based on http://svn.collab.net/repos/svn/trunk/tools/hook-scripts/log-police.py
#
# usage: pre-commit.py -t TXN_NAME REPOS

PhirePhly

                          THE ISA AND PC/104 BUS



IBM, IBM/XT, IBM PC, and IBM PC AT are registered trademarks of 
International Business Machines Corporation.

This file is designed to give a basic overview of the bus found in
most IBM clone computers, often referred to as the XT or AT bus. The 
AT version of the bus is upwardly compatible, which means that cards

drhelius

GameBoy Color DMA-Transfers v0.0.1                           13.04.2000/GPZ-HIT
-------------------------------------------------------------------------------

"old" DMA Transfer (aka 'OAM-DMA')
----------------------------------

source:      - anywhere from $0000 to $dfff
             - must be page-aligned
destination: - always OAM-Ram at $fe00 - $fe8f
length:      - always 4*40 (=160 / $a0) bytes

drhelius

To detect Super Game Boy, the values of SGB Flag and Old Licensee Code must be set in the cartridge header. In detail, that would mean that the value of $0146 is $03 and the value of $014B is $33.

To detect Game Boy Color, use the value of the CGB Flag in the cartridge header. If the value of $0143 is $80, then the game should be compatible with both normal and color Game Boy models. If it is $C0, then it should only work with Game Boy Color.

Additionally, some games check the value of the Accumulator directly after startup. If the value is $01, then the hardware is either Super Game Boy or normal Game Boy. If it is $FF, then the hardware is either Super Game Boy 2 or Game Boy Pocket. If it is $11, then it is either Game Boy Color or Game Boy Advance.

Lastly, you can detect if the game is on a Game Boy Advance by checking bit 0 of the B register directly after startup. If it is cleared, it is a Game Boy Color. If it is set, it is a Game Boy Advance.
__________

Note: The Super Game Boy 2 was little more th

drhelius

Game Boy Sound Operation
------------------------
Shay Green (blargg)
gblargg@gmail.com
http://www.slack.net/~ant/

** This is an incomplete draft

This documents the behavior of Game Boy sound; details which aren't
relevant to the observable behavior have been omitted unless they

drhelius

Nitty Gritty Gameboy Cycle Timing
                  ---------------------------------
                  
                  
A document about the down and dirty timing of the Gameboy's video hardware.

Written by:  Kevin Horton
Version: 0.01 (preliminary)

My findings here are based on the original DMG, Super Gameboy, and GB

drhelius

Memory Bank Controller (MBC) 3 for GameBoy Information



            by bRILLO hEAD, 1-Jan-98



 The MBC3 is a memory controller for some GameBoy carts

drhelius

1.01 - Added some new licensees, fixed some
        descriptions.
v1.00 - Initial release.
_______________

This information was taken and compiled from Martin Korth's
NO$GMB emulator. Best viewed in DOS EDIT.

Every Gameboy ROM header starts off at the HEX offset 0134.

drhelius

; GameBoy Color Boot ROM Disassembly
; Dumped by Costis
; Commenting by Randy Mongenel (Duo)
; WORK-IN-PROGRESS VERSION 09-27-2009

; ===========================================================================

; Segment type:	Pure code
		SECTION	"ROM", CODE

drhelius

	LD SP,$fffe		; $0000  Setup Stack

	XOR A			; $0003  Zero the memory from $8000-$9FFF (VRAM)
	LD HL,$9fff		; $0004
Addr_0007:
	LD (HL-),A		; $0007
	BIT 7,H		; $0008
	JR NZ, Addr_0007	; $000a

	LD HL,$ff26		; $000c  Setup Audio