| name | sourcefile | sampleof | isbios | isdevice | ismechanical | runnable | description | year | manufacturer | cloneof | romof | MachineGenreId |
| defence | midway/williams.cpp | | no | no | no | yes | Defence Command (bootleg of Defender) | 1981 | bootleg (Outer Limits) | defender | defender | Shooter / Flying Horizontal |
|
rom
| name | size | crc | sha1 | region | offset | status | optional | merge | bios |
| 1 | 4096 | ebc93622 | bd1c098e91b24409925d01aa25de013451dba8e6 | maincpu | 0 | good | no | | |
| 2 | 4096 | 2a4f4f44 | 8c0519fcb631e05e967cf0953ab2749183655594 | maincpu | 1000 | good | no | | |
| 3 | 4096 | a4112f91 | aad7ae81da7c20c7f4c1ef41697c8900a0c81f8e | maincpu | 2000 | good | no | | |
| 0 | 2048 | 7a1e5998 | c133f43427540b39a383db7f46298942420d138a | banked | 0 | good | no | | |
| 7 | 2048 | 4c2616a3 | 247411e2bb6618f77df6ea74aef1743fafb491a3 | banked | 800 | good | no | | |
| 9 | 2048 | 7b146003 | 04746f1b037bf6549fd53cff8f8c37136fce099e | banked | 1000 | good | no | | |
| 6 | 2048 | 6d748030 | 060ddf95eeb1318695a25c8c082a670fcdf117e7 | banked | 1800 | good | no | | |
| 8 | 2048 | 52d5438b | 087268ca30a42c00dbeceb4df901ddf80ae50125 | banked | 2000 | good | no | | |
| 5 | 2048 | 4a270340 | 317fcc3156a099dbe48a0658757a9d6c4c54b23a | banked | 2800 | good | no | | |
| 4 | 2048 | e13f457c | c706babc0005dfeb3c1b880047da6ec04bce407d | banked | 6000 | good | no | | |
| defcmnda.snd | 2048 | f122d9c9 | 70092fc354a2efbe7365be922fa36309b50d5c6f | soundcpu | f800 | good | no | | |
|
chip
| type | tag | name | clock |
| cpu | maincpu | Motorola MC6809E | 1000000 |
| cpu | soundcpu | Motorola MC6808 | 3579545 |
| audio | speaker | Speaker | |
| audio | dac | MC1408 DAC | |
|
control
| type | player | buttons | ways | reverse | minimum | maximum | sensitivity | keydelta | ways2 | ways3 | reqbuttons |
| joy | | 5 | vertical2 | no | | | | | | | |
|
device_ref
| name |
| mc6809e |
| m6808 |
| nvram |
| timer |
| timer |
| watchdog |
| screen |
| palette |
| speaker |
| mc1408 |
| ipt_merge_any_hi |
| ipt_merge_any_hi |
| pia6821 |
| pia6821 |
| pia6821 |
|
display
| tag | type | rotate | width | height | refresh | pixclock | htotal | hbend | hbstart | vtotal | vbend | vbstart | flipx |
| screen | raster | 0 | 292 | 240 | 60.096154 | 8000000 | 512 | 12 | 304 | 260 | 7 | 247 | no |
|
driver
| status | emulation | savestate | requiresartwork | unofficial | nosoundhardware | incomplete | cocktail |
| good | good | supported | no | no | no | no | |
|
input
| players | coins | service | tilt |
| 1 | 3 | yes | yes |
|
port
|
sound
|