688 Attack Sub
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Developers | |
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Electronic Arts | |
Release dates | |
DOS | 1989 |
Taxonomy | |
Modes | Multiplayer |
688 Attack Sub is a multiplayer game.
Availability
Source | DRM | Notes | Keys | OS |
---|---|---|---|---|
Retail |
Essential improvements
Packed file is corrupt
If you receive the error "Packed file is corrupt" when starting the game, make sure you first run LOADFIX. LOADFIX is included with DOS 5.0 or later, and is also included with DOSBox.
Multiplayer
The game has options for two-player gaming using either a serial null-modem, or a regular serial modem.
- To use the null-modem option a non-standard null-modem cable is required, that is documented in the games manual.
- The modem option does not appear to work in every version of the game. Additional clarity is needed, but some versions will disconnect immediately once a connection has been established.
Use DOSBox-X[citation needed] |
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When run in DOSBox-X, it is possible to use the serial modem emulation to setup a two-player game.
It is necessary to setup and start one game in "server" mode and the other in "client" mode. On the "Mission Selection" screen, both players must select the same mission to play, and one player needs to select blue and the other red. Only missions with a lightning symbol next to them are supported for multi-player. On the "Configuration Panel" screen, both players must ensure that "MODEM ON COM1:" is selected. Then the player with the Server config must select "AUTO-ANSWER" and wait for the client to connect. The player with the client config must ensure that the "SET TELEPHONE NUMBER" is set to "1", and click "ORIGINATE" Server Setup - DOSBox-X config The person that will run in server mode needs to configure his DOSBox-X with the following settings: [dosbox] title=688 Attack Sub - Server [cpu] core=normal [serial] serial1 = modem listenport:12345 rxdelay:50 [autoexec] mount c . c: loadfix /a 688.bat Client Setup - DOSBox-X config The person that will run in client mode needs to configure his DOSBox-X with the following settings: [dosbox] title=688 Attack Sub - Client [cpu] core=normal [serial] serial1 = modem rxdelay:50 phonebookfile = phonebook.txt [autoexec] mount c . c: loadfix /a 688.bat Client Setup - phonebook file Please create a file named "phonebook.txt" with the following content: 1 localhost:12345 Replace "localhost" in the above phonebook file example with the IP address or hostname of the player running the server config. |
Game data
Configuration file(s) location
The game does not provide a means to save its config. The game will present the video and audio options each time the game is started.
However, there is a way to start the game directly with your preferred options. For instance if you always want to start the game with VGA (option 4) and Adlib (option 1), you can start the game like such:
688.BAT 41
Save game data location
System | Location |
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DOS |
Video
Graphics feature | State | Notes | |
---|---|---|---|
Widescreen resolution | |||
Multi-monitor | |||
Ultra-widescreen | |||
4K Ultra HD | |||
Field of view (FOV) | |||
Windowed | For DOSBox toggle with Alt+↵ Enter (see the glossary page for other workarounds). | ||
Borderless fullscreen windowed | See the glossary page for potential workarounds. | ||
Anisotropic filtering (AF) | |||
Anti-aliasing (AA) | |||
Vertical sync (Vsync) | |||
60 FPS | Depends on video mode | ||
120+ FPS |
Input
Keyboard and mouse | State | Notes |
---|---|---|
Remapping | For DOSBox use the DOSBox Mapper (see the glossary page for other workarounds). | |
Mouse acceleration | ||
Mouse sensitivity | For DOSBox set in the DOSBox configuration file. | |
Mouse input in menus | ||
Mouse Y-axis inversion | ||
Controller | ||
Controller support | For DOSBox use the DOSBox Mapper (see the glossary page for other workarounds). |
Audio
Audio feature | State | Notes |
---|---|---|
Separate volume controls | ||
Surround sound | ||
Subtitles | ||
Closed captions | ||
Mute on focus lost | For DOSBox change the priority background value in the DOSBox configuration file. |
|
Royalty free audio |
Localizations
Language | UI | Audio | Sub | Notes |
---|---|---|---|---|
English |
Network
Multiplayer types
Type | Native | Players | Notes | |
---|---|---|---|---|
Local play | 1 | |||
LAN play | ||||
Online play |
Connection types
Type | Native | Notes |
---|---|---|
Peer-to-peer | Using serial modem or null-modem | |
Self-hosting | Using serial modem or null-modem |
Other information
API
Technical specs | Supported | Notes |
---|---|---|
DOS video modes | Hercules, CGA, Tandy, EGA, MCGA, VGA |
Middleware
- No middleware information; you can edit this page to add it.
System requirements
DOS | ||
---|---|---|
Minimum | Recommended | |
Operating system (OS) | 2.0 | 5.0 |
Processor (CPU) | 8086/8088 | |
System memory (RAM) | 384 | 640 |
Hard disk drive (HDD) | ||
Video card (GPU) | CGA / Hercules | Tandy, EGA, MCGA, VGA |