IP.BIN - Revision history

Unknown user at 21:07, 1 March 2023

2023-03-01T21:07:07Z

← Older revision		Revision as of 21:07, 1 March 2023
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			[[File:License.gif\|thumb\|What the player sees during IP.BIN execution, with a Windows CE MR logo displayed]]
	The Dreamcast bootsector (commonly named '''IP.BIN''') is placed on a [[GD-ROM]] or a [[MIL-CD]] in the first 16 sectors of the data track from which the Dreamcast is booting. It contains information about the software on the disc, including [[region protection]], as well as the code that displays the Sega copyright screen and prepares the system for the launch of a game title.		The Dreamcast bootsector (commonly named '''IP.BIN''') is placed on a [[GD-ROM]] or a [[MIL-CD]] in the first 16 sectors of the data track from which the Dreamcast is booting. It contains information about the software on the disc, including [[region protection]], as well as the code that displays the Sega copyright screen and prepares the system for the launch of a game title.

Unknown user: /* General Header Information */

2020-02-08T03:16:39Z

General Header Information

← Older revision		Revision as of 03:16, 8 February 2020
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	\|Bootstrap 2 (Not Required [[#Bootstraps]])		\|Bootstrap 2 (Not Required [[#Bootstraps]])
	\|}		\|}
			=== Meta information ===
	{\| class="wikitable"		{\| class="wikitable"
	!Offset		!Offset

Unknown user: /* General Header Information */

2020-02-08T03:16:06Z

General Header Information

@@ Line 48: / Line 48: @@
 |8C00E000-8C00FFFF
 |Bootstrap 2 (Not Required [[#Bootstraps]])
 |}

Unknown user at 02:50, 11 January 2020

2020-01-11T02:50:10Z

← Older revision		Revision as of 02:50, 11 January 2020
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			The Dreamcast bootsector (commonly named '''IP.BIN''') is placed on a [[GD-ROM]] or a [[MIL-CD]] in the first 16 sectors of the data track from which the Dreamcast is booting. It contains information about the software on the disc, including [[region protection]], as well as the code that displays the Sega copyright screen and prepares the system for the launch of a game title.

			Originally the bootsector was lifted from Dreamcast games to boot homebrew software, but technically using this copyrighted code was illegal in some jurisdictions. Homebrew coder [[LiENUS]] originally [[LiENUS's IP.BIN\|rewrote the IP.BIN file]], replacing as much as possible with free code. The only code that remains in this homebrew IP.BIN is Sega's copyright screen code, which is required to be unmodified in order for the disc to boot (the system checks it against a copy of the code held within the BIOS ROM). It is believed by some that using this last bit of code is legal due to the legal precedent set by ''[http://digital-law-online.info/cases/24PQ2D1561.htm Sega v. Accolade]''.

			New, additional functionality has been added to the IP.BIN in the [[neoIP]] replacement IP.BIN project. It is currently able to load homebrew and official Katana or Windows CE binaries from either [[GD-ROM]] or [[CD-ROM]].

	== Basic Overview ==		== Basic Overview ==
	* Loaded and ran from Disc ([[GD-ROM]], [[CD-ROM]])		* Loaded and ran from Disc ([[GD-ROM]], [[CD-ROM]])
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	This is Generally where all the base setup code is kept so our binary has a known, and clean execution environment in which it starts.		This is Generally where all the base setup code is kept so our binary has a known, and clean execution environment in which it starts.
	In [[Warez]] releases this is the area that is responsible for a very sneaky trick. The [[1ST_READ.BIN]] binary is kept as is on the disc, but then when scramble loaded by the bios (See [[Dreamcast_Boot_Process]] for further)) it will be unusable, so code was written to unscramble, the now ruined binary, in-place. The second part of this trick also reinitializes the [[GD-ROM]] drive and passes the [[HOLLY]] bios check so that the game may access the data on the disc and execute normally.		In [[Warez]] releases this is the area that is responsible for a very sneaky trick. The [[1ST_READ.BIN]] binary is kept as is on the disc, but then when scramble loaded by the bios (See [[Dreamcast_Boot_Process]] for further)) it will be unusable, so code was written to unscramble, the now ruined binary, in-place. The second part of this trick also reinitializes the [[GD-ROM]] drive and passes the [[HOLLY]] bios check so that the game may access the data on the disc and execute normally.

	~~==== Other uses ====~~
	* [[neoIP]] is a complete open source replacement for these bootstraps and is currently able to load: homebrew, official Katana and WINCE binaries from either a [[GD-ROM]] or [[CD-ROM]] developed by [[HaydenKow]]
	* [[IP.BIN Replacement]] This as far as I know is the first LEGAL ip.bin replacement for the dc, however it is pretty much untested. Developed by LiENUS

	==References==		==References==
	<references/>		<references/>

Unknown user: /* Bootstrap 1 */

2020-01-10T18:29:20Z

Bootstrap 1

← Older revision		Revision as of 18:29, 10 January 2020
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	==== Bootstrap 1 ====		==== Bootstrap 1 ====
	This piece of code is generally very small, under 32 bytes and sets hardware registers.		This piece of code is generally very small, under 32 bytes and sets hardware registers.
	* a custom [[MR Image]] can also live within this section at offset 0x3820, Address 0x8C00B820 and will be displayed on the license screen.		* A custom [[MR Image]] can also live within this section at offset 0x3820, Address 0x8C00B820 and will be displayed on the license screen.

	==== Bootstrap 2 ====		==== Bootstrap 2 ====

Unknown user at 04:06, 10 January 2020

2020-01-10T04:06:02Z

← Older revision		Revision as of 04:06, 10 January 2020
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	* Contains basic meta information for a disc		* Contains basic meta information for a disc
	* Draws the Sega License Screen		* Draws the Sega License Screen
	* Possibly holds an ~~image in~~ [[MR]] ~~Format~~		* Possibly holds an [[MR Image]]
	* Has space to run Code that is typically used in setting up the basic hardware then launching the binary on disc		* Has space to run Code that is typically used in setting up the basic hardware then launching the binary on disc

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	=== Bootstraps ===		=== Bootstraps ===
	This is the area in the IP.BIN that is completely unregulated and can be used however someone would like.		This is the area in the IP.BIN that is completely unregulated and can be used however someone would like.

	==== Bootstrap 1 ====		==== Bootstrap 1 ====
	This piece of code is generally very small, under 32 bytes and sets hardware registers.		This piece of code is generally very small, under 32 bytes and sets hardware registers.
	* a custom [[MR]] ~~image~~ can also live within this section at offset 0x3820, Address 0x8C00B820 and will be displayed on the license screen.		* a custom [[MR Image]] can also live within this section at offset 0x3820, Address 0x8C00B820 and will be displayed on the license screen.

	==== Bootstrap 2 ====		==== Bootstrap 2 ====
	~~Code here~~		This is Generally where all the base setup code is kept so our binary has a known, and clean execution environment in which it starts.
			In [[Warez]] releases this is the area that is responsible for a very sneaky trick. The [[1ST_READ.BIN]] binary is kept as is on the disc, but then when scramble loaded by the bios (See [[Dreamcast_Boot_Process]] for further)) it will be unusable, so code was written to unscramble, the now ruined binary, in-place. The second part of this trick also reinitializes the [[GD-ROM]] drive and passes the [[HOLLY]] bios check so that the game may access the data on the disc and execute normally.

			==== Other uses ====
			* [[neoIP]] is a complete open source replacement for these bootstraps and is currently able to load: homebrew, official Katana and WINCE binaries from either a [[GD-ROM]] or [[CD-ROM]] developed by [[HaydenKow]]
			* [[IP.BIN Replacement]] This as far as I know is the first LEGAL ip.bin replacement for the dc, however it is pretty much untested. Developed by LiENUS

	==References==		==References==
	<references/>		<references/>

Unknown user at 03:20, 10 January 2020

2020-01-10T03:20:59Z

← Older revision		Revision as of 03:20, 10 January 2020
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	{\| class="wikitable"		{\| class="wikitable"
	!Offset		!Offset
			!Size
	!Load address		!Load address
	!Contents		!Contents
	\|-		\|-
	\|0x0000-00FF		\|0x0000-00FF
			\|0x00FF : 256 Bytes
	\|8C008000-8C0080FF		\|8C008000-8C0080FF
	\|Meta information		\|Meta information
	\|-		\|-
	\|0x0100-02FF		\|0x0100-02FF
			\|0x01FF : 512 Bytes
	\|8C008100-8C0082FF		\|8C008100-8C0082FF
	\|Table of contents		\|Table of contents
	\|-		\|-
	\|0x0300-36FF		\|0x0300-36FF
			\|0x33FF : 13312 Bytes
	\|8C008300-8C00B6FF		\|8C008300-8C00B6FF
	\|SEGA license screen code		\|SEGA license screen code
	\|-		\|-
	\|0x3700-37FF		\|0x3700-37FF
			\|0x00FF : 256 Bytes
	\|8C00B700-8C00B7FF		\|8C00B700-8C00B7FF
	\|Area protection symbols		\|Area protection symbols
	\|-		\|-
	\|0x3800-5FFF		\|0x3800-5FFF
			\|rowspan="2"\|0x47FF : 18432 Bytes
	\|8C00B800-8C00DFFF		\|8C00B800-8C00DFFF
	\|Bootstrap 1		\|Bootstrap 1
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	\|0x6000-7FFF		\|0x6000-7FFF
	\|8C00E000-8C00FFFF		\|8C00E000-8C00FFFF
	\|Bootstrap 2 (Not Required[[#~~Bootstrap~~]])		\|Bootstrap 2 (Not Required [[#Bootstraps]])
	\|}		\|}

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	== Deeper Look into User Code ==		== Deeper Look into User Code ==
			All IP.BIN files from Sega are generally made with the IP Maker software and follow the same basic layout codewise. Bootstrap 1 is very small and is responsible for setting some minor hardware registers then jumps immediately to Bootstrap 2. This second Bootstrap actually does the bulk of the work and handles setting up the stack, VBR, disables cpu caching and then handles the jump to [[1ST_READ.BIN]] which is loaded to address 0x8C010000.

	=== Bootstrap ===		=== Bootstraps ===
	~~bloh <ref name="Perry">Perry's Handbook~~, ~~Sixth Edition, McGraw-Hill Co~~., ~~1984~~.~~</ref>~~		This is the area in the IP.BIN that is completely unregulated and can be used however someone would like.
			==== Bootstrap 1 ====
			This piece of code is generally very small, under 32 bytes and sets hardware registers.
			* a custom [[MR]] image can also live within this section at offset 0x3820, Address 0x8C00B820 and will be displayed on the license screen.

			==== Bootstrap 2 ====
			Code here

	==References==		==References==
	<references/>		<references/>

Unknown user at 02:58, 10 January 2020

2020-01-10T02:58:19Z

← Older revision		Revision as of 02:58, 10 January 2020
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	\|0x6000-7FFF		\|0x6000-7FFF
	\|8C00E000-8C00FFFF		\|8C00E000-8C00FFFF
	\|Bootstrap 2 (Not Required[[~~IP.BIN~~#Bootstrap]])		\|Bootstrap 2 (Not Required[[#Bootstrap]])
	\|}		\|}

Unknown user: Created page with "== Basic Overview == * Loaded and ran from Disc (GD-ROM, CD-ROM) * Contains basic meta information for a disc * Draws the Sega License Screen * Possibly holds an image..."

2020-01-10T02:57:18Z

Created page with "== Basic Overview == * Loaded and ran from Disc (GD-ROM, CD-ROM) * Contains basic meta information for a disc * Draws the Sega License Screen * Possibly holds an image..."

New page

== Basic Overview ==
* Loaded and ran from Disc ([[GD-ROM]], [[CD-ROM]])
* Contains basic meta information for a disc
* Draws the Sega License Screen
* Possibly holds an image in [[MR]] Format
* Has space to run Code that is typically used in setting up the basic hardware then launching the binary on disc

== General Header Information ==
Overview of Each piece of the IP.BIN listing file offset and memory location when loaded <ref>''[http://mc.pp.se/dc/ip.bin.html]'', Dreamcast Programming: IP.BIN, Marcus Comstedt</ref>
{| class="wikitable"
!Offset
!Load address
!Contents
|-
|0x0000-00FF
|8C008000-8C0080FF
|Meta information
|-
|0x0100-02FF
|8C008100-8C0082FF
|Table of contents
|-
|0x0300-36FF
|8C008300-8C00B6FF
|SEGA license screen code
|-
|0x3700-37FF
|8C00B700-8C00B7FF
|Area protection symbols
|-
|0x3800-5FFF
|8C00B800-8C00DFFF
|Bootstrap 1
|-
|0x6000-7FFF
|8C00E000-8C00FFFF
|Bootstrap 2 (Not Required[[IP.BIN#Bootstrap]])
|}

== Execution Flow Overview ==
bleh

== Deeper Look into User Code ==

=== Bootstrap ===
bloh <ref name="Perry">Perry's Handbook, Sixth Edition, McGraw-Hill Co., 1984.</ref>

==References==
<references/>