RoboCop pirate cart

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zoinknoise
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RoboCop pirate cart

Post by zoinknoise »

picked up another batch of Fami pirates, and found this one in the bunch. looks to be from late 1989, soon after the JP release. original mapper was MMC3 but not sure what this discrete mapper is.
IMG_4407.jpeg
IMG_4409.jpeg
IMG_4403.jpeg
IMG_4404.jpeg
the game has been hacked, at least a little, to modify the title screen and add in a level select code. i can dump it if necessary.
lidnariq
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Re: RoboCop pirate cart

Post by lidnariq »

That might be mapper 105 106, oddly enough.
Last edited by lidnariq on Wed Oct 19, 2022 12:00 am, edited 1 time in total.
Reason: braino
Joe
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Re: RoboCop pirate cart

Post by Joe »

I don't think it could be mapper 105.

It looks like it might be a subset of MMC3 with a different IRQ. I'm not sure if it's actually compatible with MMC3 or just MMC3-like, though.
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krzysiobal
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Re: RoboCop pirate cart

Post by krzysiobal »

Code: Select all

REGISTERS:
$8000 [....PPPP] 
$8001 [....PPPP] 
$8002 [....PPPP] 
$8010 [MCCCCCCC]
       +-------- nametable at $2000
$8011 [MCCCCCCC]
       +-------- nametable at $2400
$8012 [MCCCCCCC]
       +-------- nametable at $2800
$8013 [MCCCCCCC]
       +-------- nametable at $2c00
$8020 [.CCCCCCC]
$8021 [.CCCCCCC]
$8022 [.CCCCCCC]
$8023 [.CCCCCCC]
$8030 [........] - writing will enable interrupts and start counter (after 16384 M2 cycles, IRQ is asserted)
$8040 [........] - writing will acknowledge irq, disable irqs, reset and stop counter

PRG:
$8000|$a000|$c000|$e000
-----+-----+-----+-----
{8000|$8001|$8002| {-1}

CHR:
$0000|$0400|$0800|$0c00|$1000|$1400|$1800|$1c00 
-----+-----+-----+-----+-----+-----+-----+-----  
$8010|$8011|$8012|$8013|$8020|$8021|$8022|$8023 

* PPU /A13 is taken into account, PPU A13 is not
* GND2 (pin 16) is not routed to anything at all
* CHR A15 and CHR A16 are reversed
Attachments
pcb-top-tracks.jpg
sch.png
Image My website: http://krzysiobal.com | Image My NES/FC flashcart: http://krzysiocart.com
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zoinknoise
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Re: RoboCop pirate cart

Post by zoinknoise »

thanks krzysiobal. :beer: you need a section of your website with all your schematics! :mrgreen: you have done so many mappers by now~
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aquasnake
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Re: RoboCop pirate cart

Post by aquasnake »

something like mapper #417

just a bit difference about the mirroring address and IRQ counting

I don't know if these mappers are from the same design-house, but they seem very similar.

Mapper #106 - pirate Super Mario Bros. III
Mapper #117 - FutureMedia
Mapper #127 - pirate Double Dragon II - The Revenge
Mapper #417 - pirate Batman: The Video Game
Mapper #??? - pirate Robocop
Mapper #??? - pirate Nekketsu Monogatari

They might be a large family, with little difference between all variants: some are address lines interleaving, some are IRQ counter preload or overflow values, and some are advanced control modes (1-bit bank switching) of mirroring
Last edited by aquasnake on Thu Oct 20, 2022 3:43 am, edited 3 times in total.
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aquasnake
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Re: RoboCop pirate cart

Post by aquasnake »

The ABBA team is also an organization that pirated many games. Enter ABBA in the game start menu as the password to select stage.

This team specialized in piracy of enhanced chip carts, such as vrc4 and fme7, and simplified the circuit through changing mapper design
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zoinknoise
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Re: RoboCop pirate cart

Post by zoinknoise »

aquasnake wrote: Wed Oct 19, 2022 5:07 pm I don't know if these mappers are from the same design-house, but they seem very similar.
Mapper #417 - pirate Batman: The Video Game
Mapper #??? - pirate Robocop
there is definitely a connection with this cart to whoever did mapper 417. the wiki says that the Batman hack for mapper 417 was made by "Fine Studio." the PCB of this RoboCop pirate has "Fine Studio" printed on the back.
fine studio.jpeg
fine studio.jpeg (29.77 KiB) Viewed 1262 times
NewRisingSun
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Re: RoboCop pirate cart

Post by NewRisingSun »

If you decide to make the dump available, I will gladly assign a submapper to mapper 417.
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zoinknoise
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Re: RoboCop pirate cart

Post by zoinknoise »

really, this cart has not been dumped yet? in that case, it's my pleasure to preserve it. i just desoldered the ROMs and dumped them now. please let me know if there are any problems.
Attachments
robocop pirate 4M.bin
(128 KiB) Downloaded 40 times
robocop pirate 4L.bin
(128 KiB) Downloaded 38 times
NewRisingSun
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Re: RoboCop pirate cart

Post by NewRisingSun »

Two corrections:
  1. "writing will enable interrupts and start counter (after 16384 M2 cycles, IRQ is asserted)" <- 4096, not 16384.
  2. "robocop pirate 4L.bin" has A15 and A16 swapped.
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zoinknoise
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Re: RoboCop pirate cart

Post by zoinknoise »

NewRisingSun wrote: Fri Oct 28, 2022 4:53 pm "robocop pirate 4L.bin" has A15 and A16 swapped.
okay, i dumped it again. let me know if it's ok.
Attachments
robocop pirate 4L v2.bin
(128 KiB) Downloaded 34 times
NewRisingSun
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Re: RoboCop pirate cart

Post by NewRisingSun »

Thank you, but you need not have done that; I swapped the address line in the previous dump myself.
NewRisingSun
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Re: RoboCop pirate cart

Post by NewRisingSun »

Added mapper 417 submapper 1.
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