https://wiki.arcadeotaku.com/index.php?action=history&feed=atom&title=Namco_JVS_to_JAMMA_AdaptorNamco JVS to JAMMA Adaptor - Revision history2026-04-06T04:57:46ZRevision history for this page on the wikiMediaWiki 1.42.1https://wiki.arcadeotaku.com/index.php?title=Namco_JVS_to_JAMMA_Adaptor&diff=13131&oldid=prevInvzim at 07:12, 7 December 20172017-12-07T07:12:34Z<p></p>
<p><b>New page</b></p><div>__NOTOC__<br />
= Namco JVS / JAMMA Adapter =<br />
*Part #8662968102<br />
*Generates -5V<br />
*S-Video out<br />
*Switchable mono/stereo<br />
*Buttons 1-4 on JAMMA edge<br />
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One of the the best options for playing JAMMA games in a [[JVS]] cabinet. Originally came with the [[Namco_Cyber_Lead|Namco Cyber Lead]] cabinet. The board was shipped from factory with an audio fix consisting of 2 jumper wires, going through the PCB at position marked JP4 to resistors R26 and R30.<br />
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[[Image:Namco JAMMA - JVS.jpg|600px]]<br />
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==Kick Harness==<br />
Kick is of type ???<br />
===Pinout===<br />
#SPKR+<br />
#SPKR-<br />
#GND<br />
#Player 1 - Button 4<br />
#Player 2 - Button 4<br />
#Player 1 - Button 5<br />
#Player 2 - Button 5<br />
#Player 1 - Button 6<br />
#Player 2 - Button 6<br />
#GND<br />
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==Coin Issues==<br />
[[CAVE CV1000]] (SH3) games seem to have issues with coin and or test key:<br />
*EspGaluda II - coin input does not work, test key does not work (service credit works, so you can play..)<br />
*Akai Katana - coin input does not work<br />
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Other PCB's with similar issues:<br />
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Alcon - coin input does not work, service credit does not work<br />
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MVS 138-in-1 - coin input does not work, service credit does not work<br />
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Street Fight (German version of "Empire City: 1932") - coin input does not work, service credit does not work<br />
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==Other issues==<br />
Be aware of voltage drop when using power-hungry [[PCB_Power_Consumption | boards ]], the short jamma harness has 4x24AWG(thin!) wires for 5V delivery and the PCB itself does not have fantastic power delivery layout, meaning you may see some voltage drop. When tested with 5A load, it will drop in excess of 0.2V in the board itself, in addition to voltage drop of the JVS power cables in the cabinet.<br />
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It has a factory 'bodge' for audio, 2 wires manually soldered. If you want 'clean dual mono', you need an RCA Y cable and only use the red/right RCA output.<br />
==TBD==<br />
Dipswitches 1-4 (SW2)<br />
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!!!Not Confirmed!!!<br />
Dip 1 = Test<br />
Dip 2 = Stop Screen<br />
Dip 3 = Unassigned<br />
Dip 4 = Unassigned<br />
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== Manual ==<br />
[[Media:Namco jvs-jamma.pdf|Instruction Manual]]<br />
[[Category:PCB_Tech]]<br />
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==Additional Tech Notes==<br />
* IC1 - MACH211 - High-Performance EE CMOS Programmable Logic<br />
* IC2,IC5,IC7,IC9 - 74F373 - Octal Transparent Latch with 3-STATE Outputs<br />
* IC3 - 74F74 - Dual D-Type Positive Edge-Triggered Flip-Flop<br />
* IC4 - "3771 9649 342" - Most likely a MB3771 Power Supply Monitor<br />
* IC6 - C77 7A1 3202A02F - Most likely the CPU<br />
* IC8 - AT29C512 - 512kbit flash memory<br />
* IC10 - NKK N341256SJ-15 - 256kbit SRAM, 32768x8 bits<br />
* IC11 - LT1054 - Switched-Capacitor Voltage Converter for generating -5V<br />
* IC12 - ADM485JR - RS-485 transceiver for JVS<br />
* IC13 - 74F04 - Hex Inverter (buffer for JVS sense line?)</div>Invzim