[HN Gopher] JAMMA Video Standard
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JAMMA Video Standard
Author : ingve
Score : 126 points
Date : 2021-08-15 07:16 UTC (15 hours ago)
(HTM) web link (www.mistys-internet.website)
(TXT) w3m dump (www.mistys-internet.website)
| notRobot wrote:
| Very interesting article, but title isn't super accurate. From
| the article, JVS is an I/O (or just input?) standard, not video
| standard.
| 0xcde4c3db wrote:
| The standard itself also covers video, it's just that the video
| part is little more than "use a regular VGA connector and one
| of these approved modes", so converting that part isn't the
| sort of thing one writes an article about.
| codetrotter wrote:
| > If I can't go to the arcade, at least I can bring a favourite
| game home, right?
|
| Wait, you guys have arcades where you live?? There used to be a
| proper arcade in my city years ago but it shut down.
|
| These days the closest we get are a couple of bars that have lots
| of arcade games. But it's not the same. Because it feels like a
| bar, not an arcade, even though arcade machines are there.
|
| Where can I move to that there are real arcades?
| heisenbugtastic wrote:
| Denver: https://the1uparcadebar.com This place is awesome,
| beers, games, bar food.
| dfxm12 wrote:
| Can you describe what a "real" or "proper" arcade does feel
| like, if not a place with lots of arcade games?
|
| Maybe one of these would fit your description: galloping ghost
| in IL, Asheville pinball museum in NC, Game Galaxy in TN.
| zeven7 wrote:
| A chain option I assume you can find lots of places depending
| on whether OP considers it a real arcade or a bar: Dave &
| Buster's
| TacticalCoder wrote:
| Noooo HN, don't get me started again : )
|
| I've got a vintage arcade cab at home, with its old CRT, since a
| few years now: originally it wasn't a JAMMA cab then someone
| modified it to be JAMMA because at some point JAMMA "won" in the
| arcade world. Everything is still working, including the money
| slots (they're still using old 20 "Francs", belgian coins that is
| and I still have 4 of these coins). But I wired a button to the
| pin that adds money: easier/faster. I put one my PCB in "free
| play" mode too (using dip switches on the PCB itself).
|
| I've got a few original PCBs and some bootlegs, all vintage.
|
| But mostly I'm hooking a Raspberry with a Pi2JAMMA adapter and
| then I've got thousands of games working (most are crap, some are
| little gems).
|
| When it's all JAMMA it's convenient: I can just swap PCBs or the
| Raspberry Pi and turn the machine on and everything just works.
|
| On a semi-related sidenote many criticize old arcade game saying
| they were "exploitative because you had to put coins" but,
| honestly, I find that complete bullshit. If you played these
| games a bit, you could get good at it and finish the game on one
| credit, playing for 30 minutes or even 45 minutes on one coin.
|
| I can guarantee you: many modern games are much exploitative than
| these old arcade games. Be it in-game ads or in-game buying or
| all the A/B testing to make sure its addictive etc.
|
| Another benefit of these old arcade games: they're simpler, which
| kids do love. My six years old daughter loves our arcade machine
| and often asks me: _" Dad please, can we turn the arcade on?"_. I
| don't have to worry about her getting ads or disturbing videos or
| being spied upon.
|
| Then of course playing Robotron 2084 with two joysticks, as it is
| meant to be played (no buttons used in that game) is great. The
| fast-paced action, incredible responsiveness and original
| controls (one joystick to move in eight directions, the other
| joystick to fire in eight directions) makes for timeless fun.
|
| I don't play games on PCs / console since a very long time. But
| once in a while I turn on the good old arcade and play a bit...
|
| It's a great thing to have at home.
|
| Wife loves it: it's in the living room. It has presence too.
| Visitors typically loves it, even if they're not into videogames
| at all.
|
| It also doubles as a very convenient laptop stand!
| flatiron wrote:
| Are you running the latest version of mame on your pi? I've
| always used amd64 on my arcade cab so I can not run 20 year old
| mame builds.
| TacticalCoder wrote:
| I should know better (I've got lots of RPis I installed
| myself) but in this case I really don't know: a friend of
| mine just dd'ed his working setup on to a memory card.
| Nbox9 wrote:
| > If you played these games a bit, you could get good at it and
| finish the game on one credit, playing for 30 minutes or even
| 45 minutes on one coin.
|
| This varies a bit depending on the game, but it's safe to say
| that the average play on an average arcade game is much less
| than 30 minutes per credit. For example, one game of Dance
| Dance Revolution typically consists of three 90 second songs
| with the option of earning a fourth bonus song as a reward for
| skill. Factoring in sixty seconds for menus between songs a
| player will play between 7-10 minutes a credit. This number is
| much closer to what the average game targets. You'll see
| similar numbers in pinball and racing games.
| dfxm12 wrote:
| For the aforementioned robotron and games of that era, you're
| mostly limited by your skill. You won't get a game over until
| you die. Look up a record breaking score run. It'll last
| hours. Of course, you can't get that good until you sink a
| ton of credits into the game...
|
| It was mostly in the 90s when they figured out they should
| probably limit game length per credit, like a restaurant
| trying to turn over a table as many times as possible. Stuff
| like NBA Jam and Street Fighter II set the stage for that
| even before DDR.
| Jeema101 wrote:
| Some of the terminology used in the arcade world is a bit
| confusing, so just to clarify:
|
| 'JAMMA' is the original arcade standard developed in the 1980s.
| It specified a standardized edge connector pinout to interface an
| arcade PCB with the rest of the arcade cabinet (i.e the power,
| video, sound, and controls).
|
| 'JAMMA 2' aka 'JAMMA Video Standard' aka 'JVS' was/is a successor
| standard that made things a bit easier by using separate
| connectors for video, I/O, etc. instead of putting everything on
| one giant edge connector. That standard is what this article is
| about.
|
| https://en.wikipedia.org/wiki/Japan_Amusement_Machine_and_Ma...
| detaro wrote:
| RS-485 over USB connectors... AAAAHHHH! (Presumably to reuse
| common connectors and cheaply available cables over more custom
| things, but still a bit surprising for something as simple as
| RS-485 - seeing this more nowadays with devices using HDMI and
| USB3 cables, because they are cheaply available cables with
| somewhat defined performance for highspeed signals)
| zinekeller wrote:
| It's just titled "Exploring JVS", but if clarification is needed
| "video" should be dropped out of the HN title.
| city41 wrote:
| If the title was just "JAMMA Standard", then that would suggest
| the original JAMMA standard from the 80s. JVS is its successor,
| and unfortunately has a confusing name.
| gugagore wrote:
| from the title, I expected this to be a standard for video
| signals (like NTSC), and was excited to learn about a video
| standard I had never heard of.
| darig wrote:
| Absolutely no one calls it JVS... it's JAMMA. Explore that.
| btown wrote:
| Asking the question that the title (incorrectly) implies: were
| there standard formats or codecs in which arcade games _encoded_
| their promotional intro videos that would loop to bring in new
| players? Or was this more or less at the manufacturer 's
| discretion? As one of the most storage-hungry assets compared to
| game logic, textures, and audio, there must have been tremendous
| attention placed towards reducing the size of those videos.
| ZFH wrote:
| It's generally called 'Attract mode', and at least from what I
| recall from the golden era arcade games (from the mid '80s up
| until the mid '90s) it's never an intro video, rather something
| done completely in-engine. Unless you're thinking lasergames,
| but that's ... all video.
| gugagore wrote:
| You must mean
| https://en.wikipedia.org/wiki/American_Laser_Games , which
| uses the random-access capabilities of a laserdisc player.
| Nextgrid wrote:
| I think a lot of demos wouldn't be videos, instead it actually
| plays the game for real by feeding it a set of pre-recorded
| inputs.
| anothermoron wrote:
| Isn't the attract mode just a demo using in-game graphics most
| of the time ?
| [deleted]
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(page generated 2021-08-15 23:02 UTC)