### Booting into Windows 3.11

Source: https://tasvideos.org/Bizhawk/DOSBox

Command to run to start Windows 3.11 after it has been installed on the hard disk drive. Ensure to use the correct path separator.

```dos
windows\win
```

--------------------------------

### Example Lua Script for Doom Memory Domains

Source: https://tasvideos.org/Bizhawk/Doom

A Lua script is available in the Bizhawk repository to demonstrate the usage of 'Things' and 'Lines' memory domains exposed by the Doom core. This script serves as a practical example for developers.

```lua
require "BizHawk.External" -- Example import, actual script may vary

-- Placeholder for actual script content
print("This is a placeholder for the things-lines.lua script.")
print("It demonstrates usage of 'Things' and 'Lines' memory domains.")

```

--------------------------------

### Pad String Start

Source: https://tasvideos.org/Bizhawk/LuaFunctions

Prepends a padding character to the start of a string until it reaches a specified length. If the padding character is invalid, a space is used.

```lua
string bizstring.pad_start(string str, int length, string pad_char)
```

--------------------------------

### Get Board Name

Source: https://tasvideos.org/BizHawk/LuaFunctions

Returns the board name of the loaded ROM, if available.

```lua
emu.getboardname()
```

--------------------------------

### Windows 3.11 Disk Image Details

Source: https://tasvideos.org/Bizhawk/DOSBox

Metadata for the disk images required for installing Windows 3.11. These files are essential for creating the installation movie.

```text
File:  disk1.img
Size:  1,474,560 bytes
MD5:   f6a9079f98bf7525657931c55ce7a30b
SHA-1: 9fc53cc4edaba18126ca0246cfd31f7724aa7b2a
```

```text
File:  disk2.img
Size:  1,474,560 bytes
MD5:   9d3c2d8b2d014181c10bf391a637c1f2
SHA-1: 3e64348839709639b2d068dbcedc0c603f50fa5d
```

```text
File:  disk3.img
Size:  1,474,560 bytes
MD5:   fad9e1049e406e6888dba0f86462213e
SHA-1: 920a981e49fab92cfed805f1a680ff24fff4e95d
```

```text
File:  disk4.img
Size:  1,474,560 bytes
MD5:   54f874abc9b133829f89b0c2f71eab41
SHA-1: 582dfcc90ad4ea7ed5d812b252f2b9953642e410
```

```text
File:  disk5.img
Size:  1,474,560 bytes
MD5:   dad5556c26c90fa2c5b91e46fe795001
SHA-1: f4507367afb811035b4a8a2bcb74e5797ace0de1
```

```text
File:  disk6.img
Size:  1,474,560 bytes
MD5:   5bc0c7cba983c26d1300b35945a21cea
SHA-1: 5f72300cf89c117c9a654185da6f2b0300c0a9b7
```

--------------------------------

### Windows 3.11 Utilities ISO Details

Source: https://tasvideos.org/Bizhawk/DOSBox

Details for the Windows 3.11 utilities ISO file, which is required for the installation process.

```text
File:   windows311-utilities.iso
Size:   1,480,704 bytes
MD5:    5c82f38ae021576268981a2209648056
SHA-1:  89c66da9f5d333e3b5839f347332e71771db2f51
```

--------------------------------

### Exported Hard Disk Drive Image Details

Source: https://tasvideos.org/Bizhawk/DOSBox

Details of the resulting HDD image after a successful Windows 3.11 installation movie.

```text
File:   w311.hdd
Size:   527,966,208 bytes
MD5:    b13bc3d7c70d97e13c25b69818f209e7
SHA-1:  c1745784e946131b084b7522fd950fdc92d1ad0e
```

--------------------------------

### Get System ID

Source: https://tasvideos.org/BizHawk/LuaFunctions

Returns the ID string of the current core loaded. Note: No ROM loaded will return the string NULL.

```lua
emu.getsystemid()
```

--------------------------------

### client.openrom

Source: https://tasvideos.org/Bizhawk/LuaFunctions

Loads a ROM from the specified file path.

```APIDOC
## client.openrom

### Description
Loads a ROM from the given path.

### Parameters
#### Request Body
- **path** (string) - Required - The file path to the ROM file.

### Response
#### Success Response (200)
- **result** (bool) - Returns true if the ROM was successfully loaded, otherwise false.
```

--------------------------------

### BizHawk Forms Get Property

Source: https://tasvideos.org/Bizhawk/PreviousReleaseHistory

Get a property from a form element in BizHawk.

```bizhawk
forms.getproperty()
```

--------------------------------

### Get Total Executed Cycles

Source: https://tasvideos.org/BizHawk/LuaFunctions

Gets the total number of executed CPU cycles.

```lua
emu.totalexecutedcycles()
```

--------------------------------

### Lua: Get Window Size

Source: https://tasvideos.org/Bizhawk/PreviousReleaseHistory

Get the current window dimensions using the client.getwindowsize() function in Lua.

```lua
client.getwindowsize()
```

--------------------------------

### input.get

Source: https://tasvideos.org/Bizhawk/LuaFunctions

Retrieves the current state of host keys and buttons.

```APIDOC
## input.get

### Description
Returns a dict-like table of key/button names. Only pressed buttons appear with a value of true.

### Method
Function

### Response
- **table** (nluatable) - Dictionary of pressed keys and buttons.
```

--------------------------------

### input.get

Source: https://tasvideos.org/BizHawk/LuaFunctions

Retrieves the current state of host keys and buttons.

```APIDOC
## input.get

### Description
Returns a dict-like table of key/button names. Only pressed buttons appear with a value of true.

### Response
- **table** (nluatable) - Dictionary of pressed keys and buttons.
```

--------------------------------

### comm.httpGet

Source: https://tasvideos.org/Bizhawk/LuaFunctions

Performs an HTTP GET request to a specified URL.

```APIDOC
## comm.httpGet

### Description
Makes a HTTP GET request.

### Parameters
#### Request Body
- **url** (string) - Required - The target URL for the GET request.

### Response
#### Success Response (200)
- **response** (string) - The body of the HTTP response.
```

--------------------------------

### Load WAD Files with Multi-Disk Bundler XML

Source: https://tasvideos.org/Bizhawk/Doom

Use this XML structure to specify IWAD and PWAD files for loading in BizHawk. Ensure the 'System' attribute is set to 'Doom'.

```xml
<BizHawk-XMLGame System="Doom" Name="btsx">
  <LoadAssets>
    <Asset FileName=".\doom2.wad" />
    <Asset FileName=".\btsx_e1a.wad" />
    <Asset FileName=".\btsx_e1b.wad" />
  </LoadAssets>
</BizHawk-XMLGame>

```

--------------------------------

### Get Lag Count

Source: https://tasvideos.org/BizHawk/LuaFunctions

Returns the current lag count.

```lua
emu.lagcount()
```

--------------------------------

### Get Available Scopes

Source: https://tasvideos.org/BizHawk/LuaFunctions

Lists the available scopes that can be specified for on_bus_* events.

```lua
event.availableScopes()
```

--------------------------------

### Lua: Minimize Frameskip

Source: https://tasvideos.org/Bizhawk/PreviousReleaseHistory

Minimize frameskip settings using emu.minimizeframeskip() in Lua.

```lua
emu.minimizeframeskip()
```

--------------------------------

### Verify Core-7.0.iso file integrity

Source: https://tasvideos.org/Bizhawk/DOSBox/Linux

Checksum information for the Tiny Core 7.0 ISO image.

```text
File:  Core-7.0.iso
Size:  11,116,544 bytes
MD5:   11ee7e2a449415cec8feb5dc7dbee064
SHA-1: 724b57a226ab1e771a483dff5f0bb80d030d5a0d
```

--------------------------------

### BizHawk Client Screen Height

Source: https://tasvideos.org/Bizhawk/PreviousReleaseHistory

Get the current screen height of the BizHawk client.

```bizhawk
client.screenheight()
```

--------------------------------

### Lua: Frameskip

Source: https://tasvideos.org/Bizhawk/PreviousReleaseHistory

Adjust the frameskip settings using emu.frameskip() in Lua.

```lua
emu.frameskip()
```

--------------------------------

### Lua: Get Mouse Input

Source: https://tasvideos.org/Bizhawk/PreviousReleaseHistory

Retrieve the current mouse coordinates using the input.getmouse() function in Lua.

```lua
input.getmouse()
```

--------------------------------

### Register Bus Read Event

Source: https://tasvideos.org/BizHawk/LuaFunctions

Fires immediately before the given address is read by the core. Your callback can have 3 parameters `(addr, val, flags)`. `val` is the value read. If no address is given, it fires on every memory read.

```lua
event.on_bus_read(nluafunc luaf, [uint? address = nil], [string name = nil], [string scope = nil])
```

--------------------------------

### Get Display Type

Source: https://tasvideos.org/BizHawk/LuaFunctions

Returns the display type (PAL vs NTSC) that the emulator is currently running in.

```lua
emu.getdisplaytype()
```

--------------------------------

### TASStudio API

Source: https://tasvideos.org/BizHawk/LuaFunctions

Functions for controlling TASStudio playback, recording, and UI callbacks.

```APIDOC
## tastudio.islag

### Description
Returns whether or not the given frame was a lag frame.

### Parameters
#### Path Parameters
- **frame** (int) - Required - The frame index to check.

### Response
- **result** (bool?) - True if lag, false if not, null if unknown.
```

```APIDOC
## tastudio.loadbranch

### Description
Loads a branch at the given index.

### Parameters
#### Path Parameters
- **index** (int) - Required - The index of the branch to load.
```

```APIDOC
## tastudio.setmarker

### Description
Adds or sets a marker at the given frame.

### Parameters
#### Path Parameters
- **frame** (int) - Required - The frame index.
- **message** (string) - Optional - An optional message for the marker.
```

--------------------------------

### SNES Layer Control API

Source: https://tasvideos.org/BizHawk/LuaFunctions

Functions to get and set the visibility of various SNES background and object layers.

```APIDOC
## snes.getlayer_bg_n / snes.setlayer_bg_n

### Description
Get or set the visibility of SNES background layers (1-4).

### Method
GET / SET

### Parameters
- **value** (bool) - Required for set - The visibility state to apply.

### Response
- **Returns** (bool) - The current visibility state.
```

--------------------------------

### Register Bus Execution Event

Source: https://tasvideos.org/BizHawk/LuaFunctions

Fires immediately before the given address is executed by the core. Your callback can have 3 parameters `(addr, val, flags)`. `val` is the value to be executed (or `0` if partially implemented).

```lua
event.on_bus_exec(nluafunc luaf, uint address, [string name = nil], [string scope = nil])
```

--------------------------------

### SNES Layer Control API

Source: https://tasvideos.org/Bizhawk/LuaFunctions

API endpoints for getting and setting the display status of SNES background and object layers.

```APIDOC
## GET snes.getlayer_bg_2

### Description
Returns whether the bg 2 layer is displayed.

### Method
GET

### Endpoint
snes.getlayer_bg_2()

## GET snes.getlayer_bg_3

### Description
Returns whether the bg 3 layer is displayed.

### Method
GET

### Endpoint
snes.getlayer_bg_3()

## GET snes.getlayer_bg_4

### Description
Returns whether the bg 4 layer is displayed.

### Method
GET

### Endpoint
snes.getlayer_bg_4()

## GET snes.getlayer_obj_1

### Description
Returns whether the obj 1 layer is displayed.

### Method
GET

### Endpoint
snes.getlayer_obj_1()

## GET snes.getlayer_obj_2

### Description
Returns whether the obj 2 layer is displayed.

### Method
GET

### Endpoint
snes.getlayer_obj_2()

## GET snes.getlayer_obj_3

### Description
Returns whether the obj 3 layer is displayed.

### Method
GET

### Endpoint
snes.getlayer_obj_3()

## GET snes.getlayer_obj_4

### Description
Returns whether the obj 4 layer is displayed.

### Method
GET

### Endpoint
snes.getlayer_obj_4()

## SET snes.setlayer_bg_1

### Description
Sets whether the bg 1 layer is displayed.

### Method
SET

### Endpoint
snes.setlayer_bg_1(bool value)

### Parameters
#### Path Parameters
- **value** (bool) - Required - The desired display state for the bg 1 layer.

## SET snes.setlayer_bg_2

### Description
Sets whether the bg 2 layer is displayed.

### Method
SET

### Endpoint
snes.setlayer_bg_2(bool value)

### Parameters
#### Path Parameters
- **value** (bool) - Required - The desired display state for the bg 2 layer.

## SET snes.setlayer_bg_3

### Description
Sets whether the bg 3 layer is displayed.

### Method
SET

### Endpoint
snes.setlayer_bg_3(bool value)

### Parameters
#### Path Parameters
- **value** (bool) - Required - The desired display state for the bg 3 layer.

## SET snes.setlayer_bg_4

### Description
Sets whether the bg 4 layer is displayed.

### Method
SET

### Endpoint
snes.setlayer_bg_4(bool value)

### Parameters
#### Path Parameters
- **value** (bool) - Required - The desired display state for the bg 4 layer.

## SET snes.setlayer_obj_1

### Description
Sets whether the obj 1 layer is displayed.

### Method
SET

### Endpoint
snes.setlayer_obj_1(bool value)

### Parameters
#### Path Parameters
- **value** (bool) - Required - The desired display state for the obj 1 layer.

## SET snes.setlayer_obj_2

### Description
Sets whether the obj 2 layer is displayed.

### Method
SET

### Endpoint
snes.setlayer_obj_2(bool value)

### Parameters
#### Path Parameters
- **value** (bool) - Required - The desired display state for the obj 2 layer.

## SET snes.setlayer_obj_3

### Description
Sets whether the obj 3 layer is displayed.

### Method
SET

### Endpoint
snes.setlayer_obj_3(bool value)

### Parameters
#### Path Parameters
- **value** (bool) - Required - The desired display state for the obj 3 layer.

## SET snes.setlayer_obj_4

### Description
Sets whether the obj 4 layer is displayed.

### Method
SET

### Endpoint
snes.setlayer_obj_4(bool value)

### Parameters
#### Path Parameters
- **value** (bool) - Required - The desired display state for the obj 4 layer.

```

--------------------------------

### BKM File Header Specification

Source: https://tasvideos.org/Bizhawk/BKMFormat

Details the metadata headers used in the .bkm file format, including emulator version, game information, and system-specific settings.

```APIDOC
## .bkm Header Format

### Description
The header contains metadata about the movie recording. All items are strings unless otherwise specified.

### Main Headers
- **comment** (string) - A note not used by the emulator.
- **emuVersion** (string) - Version of BizHawk used.
- **MovieVersion** (string) - Movie format version.
- **Platform** (string) - Game system used.
- **GameName** (string) - Name of the game.
- **Author** (string) - Creator of the movie.
- **rerecordCount** (integer) - Number of rerecords.
- **GUID** (string) - Globally unique identifier.
- **StartsFromSavestate** (boolean) - Recorded from a savestate.
- **SHA1** (string) - SHA-1 checksum of the ROM.
- **FirmwareSHA1** (string) - SHA-1 checksum of the BIOS.
- **subtitle** (string) - Format: "subtitle FRAME X Y LENGTH COLOR MESSAGE".
- **PAL** (boolean) - Recorded in PAL mode.
- **BoardName** (string) - Board/mapper type.
- **Skip_Bios** (string) - Indicates BIOS was skipped.
- **VideoPlugin** (string) - Video plugin used.
- **LoopOffset** (integer) - Frame to loop back to for infinite loop movies.
```

--------------------------------

### Register Any Bus Execution Event

Source: https://tasvideos.org/BizHawk/LuaFunctions

Fires immediately before every instruction executed by the core (CPU-intensive). Your callback can have 3 parameters `(addr, val, flags)`. `val` is the value to be executed (or `0` if partially implemented).

```lua
event.on_bus_exec_any([string name = nil], [string scope = nil])
```

--------------------------------

### Register Bus Write Event

Source: https://tasvideos.org/BizHawk/LuaFunctions

Fires immediately before the given address is written by the core. Your callback can have 3 parameters `(addr, val, flags)`. `val` is the value to be written (or `0` if partially implemented). If no address is given, it fires on every memory write.

```lua
event.on_bus_write(nluafunc luaf, [uint? address = nil], [string name = nil], [string scope = nil])
```

--------------------------------

### TAStudio Lua API

Source: https://tasvideos.org/Bizhawk/PreviousReleaseHistory

Functions for interacting with the TAStudio recording state via Lua scripts.

```APIDOC
## Lua TAStudio API

### Description
Functions to manage and query the recording state within TAStudio.

### Methods
- **tastudio.getrecording()** - Returns the current recording status.
- **tastudio.setrecording(bool)** - Sets the recording status.
- **tastudio.togglerecording()** - Toggles the current recording status.
```

--------------------------------

### Byte Swap 16-bit

Source: https://tasvideos.org/Bizhawk/LuaFunctions

Performs a byte swap on a 16-bit unsigned integer. For example, `bit.byteswap_16(0xFF00)` would return `0x00FF`.

```lua
ushort bit.byteswap_16(ushort val)
```

--------------------------------

### Verify LINLD.COM file integrity

Source: https://tasvideos.org/Bizhawk/DOSBox/Linux

Checksum information for the LINLD.COM utility required for the boot process.

```text
File:  LINLD.COM
Size:  5,832 bytes
MD5:   cb3627ce4505a59b506beab8f6ae7360
SHA-1: 17c944731dfb4d09cf077d53147fb2f71f239c52
```