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Author Topic: Arcade Shift Registers, Address Decoders, Multiplexers, etc.  (Read 733 times)

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vanwatson

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Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« on: December 15, 2014, 09:24:28 pm »
For arcade logic game boards. What do they mostly use the shift registers for? the address decoders for? multiplexers for?
How does arcade logic board use shift registers, address decoders, multiplexers?

Arcade logic boards mostly use shift registers to do what?
Arcade logic boards mostly use address decoders to do what?
Arcade logic boards mostly use multiplexers to do what?

 


Slippyblade

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #1 on: December 15, 2014, 09:27:48 pm »
Dude.  Seriously?  Arcade electronics are no different than any other electronics.  If you want to know what a shift register does, google it.  Same with everything else.

vanwatson

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #2 on: December 15, 2014, 09:29:55 pm »
I know what they do, but i'm talking about how they get used on arcade logic circuit boards, they use them differently


Slippyblade

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #3 on: December 15, 2014, 09:49:43 pm »
I know what they do, but i'm talking about how they get used on arcade logic circuit boards, they use them differently

No, they don't.  An arcade board is nothing more than a dedicated computer.  If  you know what the circuits do in a computer, then you know what they do on an arcade board.  Nothing magical happens with a circuit simply by being on a board that just happens to be inside a wooden cabinet with a joystick.

ed12

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #4 on: December 15, 2014, 10:05:54 pm »
huh ?

>I know what they do<

then why are u asking ??

ed
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SavannahLion

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #5 on: December 15, 2014, 10:26:18 pm »
huh ?

>I know what they do<

then why are u asking ??

ed

He is being purposefully antagonizing.

So... is this a good one for this?  :gobama

I'd do this one, but that's technically an oxymoron  :troll:

vanwatson

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #6 on: December 15, 2014, 10:46:50 pm »
Here guys I want examples like this

Address Decoding is for
        1.) Organize the memory Map
        2.) Chip Select

Moving Object Multiplexing
   a.) Multiplexer pass information to the moving object PROM
   b.) Multiplexer#1 determines which image should appear
   c.) Multiplexer#2 determines which line of that image is to be displayed

Shift Registers
   a.) Character generator output shift registers to form an 8 horizontal wide by 8 vertical line character on the CRT
   b.) Shift Register takes a byte of data from the Character generator chip and displays one line at a time from left to right on the CRT
   c.) Shift Registers on the output of a Moving Object PROMs
                      The Shift Register, shifts 16 parallel bits output serially to become video
   d.) The Shift Register results in a video image that is 16 bits wide by 16 lines high

IRQ goes LOW when:
   a.) Latches when a coin is dropped
   b.) Vertical sync occurs
   c.)  The CPU jump to the Interrupt service routine
   d.) Updates the Screen by the vertical retrace interval 

 Screen Controller PROM
   a.) Controls the direction of data flow into and out of the screen RAM and Character Generator RAM
   b.) Prevents Buss Conflicts

CRT controller Chip = 6845/6545/46505
   a.) This chip controls the timing of the Screen RAM
   b.) Is a programmable sync and scan generator chip


SavannahLion

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #7 on: December 15, 2014, 10:53:16 pm »
Profundus Maximus

Patois maybe?

ed12

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #8 on: December 15, 2014, 11:04:29 pm »
holy ---steaming pile of meadow muffin---
u moved from why a gate dose this to object code in 1 go
wtf...
u want to make your own video game board ?
my dear god learn machine code and object code
look them up...
u want us to design u a machine on old part's ?

ed
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vanwatson

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #9 on: December 15, 2014, 11:13:16 pm »
I'm trying to understand how an arcade logic board works

There is different address decoders, different latches, different shift registers, different multiplexers.etc.

They all have a purpose and a function. They all do the same thing for every logic arcade board and are placed in the same stages in every logic arcade board.

Please explain the purpose and function of these IC chips like what I did from your experience and repairs


SavannahLion

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #10 on: December 15, 2014, 11:20:32 pm »
holy ---steaming pile of meadow muffin---
u moved from why a gate dose this to object code in 1 go
wtf...
u want to make your own video game board ?
my dear god learn machine code and object code
look them up...
u want us to design u a machine on old part's ?

ed

Wow, it did...

That's why I think it's full of ---steaming pile of meadow muffin---. Leading good guys like you around by the nose then coming up with this kind of crap out of the blue. Not sure what this entity is doing, but it smells bad.
« Last Edit: December 15, 2014, 11:22:40 pm by SavannahLion »

vanwatson

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #11 on: December 16, 2014, 02:47:36 am »
Ed and Littleshawn

When you look at arcade logic board schematics and see the Shift registers, address decoders, multiplexers, latches , how do you think they work and what the do for arcade logic board games?

Mostly they use PROM , programmable ram for Video ROM, why is that? why do they want to use a programmable rom for video signals?

 

SavannahLion

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Re: Arcade Shift Registers, Address Decoders, Multiplexers, etc.
« Reply #12 on: December 16, 2014, 08:39:34 am »
Notice how the mysterious creature, stuck in the tar, calls out to passing herds, picking out the most likely victims by name.