Author Topic: VTxx Dumping Thread  (Read 39673 times)

davidstech

  • Full Member
  • ***
  • Posts: 140
    • View Profile
    • http://ds0.me
VTxx Dumping Thread
« Reply #30 on: February 02, 2018, 01:48:53 PM »
Here are the split ROMs in NES format, although it seems most of the 130-in-1 games still aren't working in Nintendulator? I seem to have them working OK in MAME now.

http://davidstech.net/games/multis/Family%20Pocket%20(split,%20NES%20format).7z

I think you're right about 412C bit0, but I need to check.
Underwater is broken in MAME too, seems odd. Pretty sure dump is OK as it was consistent over several reads and everything else works...
« Last Edit: February 02, 2018, 01:53:43 PM by davidstech »

NewRisingSun

  • Sr. Member
  • ****
  • Posts: 289
    • View Profile
VTxx Dumping Thread
« Reply #31 on: February 02, 2018, 02:04:49 PM »
davidstech
 
it seems most of the 130-in-1 games still aren't working in Nintendulator? [/quote]The previously-posted build gets confused by $412C bit 0. I'll post an updated build later, once I get the palette selection issue in the 220-in-1 and 600-in-1 ROMs resolved.

Underwater and Zanac use CHR-RAM rather than CHR-ROM. $4242 bit 0 selects CHR-ROM (0) or 8 KiB CHR-RAM (1).

Edit: And FC Pocket 600 in 1 has an extended register at $411D with Bit 0 (value $01) enabling MMC1 mode at $8000-$FFFF, bit 1 (value &02) enabling an UNROM latch at $8000-$FFFF, and bit 2 (value $04) enabling 8 KiB CHR-RAM instead of CHR-ROM. Yay. Choose Jackal for testing UNROM/CHR-RAM, and Bionic Commando for testing the MMC1.
« Last Edit: February 02, 2018, 03:04:17 PM by NewRisingSun2 »

davidstech

  • Full Member
  • ***
  • Posts: 140
    • View Profile
    • http://ds0.me
VTxx Dumping Thread
« Reply #32 on: February 02, 2018, 03:35:20 PM »
Interesting, clearly VRT cared more about wider game compatibility with their new chipset. I'll look at getting this implemented in MAME.

NewRisingSun

  • Sr. Member
  • ****
  • Posts: 289
    • View Profile
VTxx Dumping Thread
« Reply #33 on: February 02, 2018, 03:40:23 PM »
It would really be great if we could get chipset names for these, otherwise they will never be officially supported in NES 2.0. Right now, we have three unknown chipsets:
- The one with the 5-5-5 RGB palette and the dancing cats
- The one with the switchable 4-4-4 RGB palette used in FC Mobile 600 that also has encrypted opcodes and so far unknown sound hardware
- MOGIS M320 with unknown palette, unknown graphics bankswitching and 8 KiB of main RAM at $0000-$1FFF.

Family Pocket 638 is more of a mapper than a console chipset. Lexibook Compact Cyber Arcade and dreamGEAR My Arcade Portable Gaming System (DGUN-2561) seem to use VT16 or VT18, but use an unknown bankswitching scheme involving registers $415x and $416x. It must be bankswitching, because they're 64 MiB, while the normal VTxx hardware only goes up to to 32.
« Last Edit: February 02, 2018, 03:41:44 PM by NewRisingSun2 »

davidstech

  • Full Member
  • ***
  • Posts: 140
    • View Profile
    • http://ds0.me
VTxx Dumping Thread
« Reply #34 on: February 02, 2018, 03:51:29 PM »
I've attempted to take photos of the dice of some of these consoles underneath the glob tops, but unfortunately VRT never put the real part number on the die (the 555 palette one, for example, is marked "VRT VH3029-002"). The FC pocket one is just marked "K06", and is clearly a different totally different chip.

I have a suspicion the M320 chipset is the same as the 555 dancing cat one, just using a different feature set/config, but I haven't decapped it yet. The PCBs look similar, and they both use SQI flash whereas every other type of VRT chipset uses parallel flash.

So far I know at least the following unclassified chips exist, that may have some degree of Famicom compatibility:
 - VT09
 - VT16
 - VT18
 - VT32
 - VT33
 - VT368
 - VT369

forgotusername

  • Full Member
  • ***
  • Posts: 129
    • View Profile
VTxx Dumping Thread
« Reply #35 on: February 02, 2018, 03:55:35 PM »
davidstech
Feb 2 2018, 03:51:29 PM
So far I know at least the following unclassified chips exist, that may have some degree of Famicom compatibility:
 - VT09
 - VT16
 - VT18
 - VT32
 - VT33
 - VT368
 - VT369[/quote]VT09 is confirmed backwards-compatible with Famicom. Many VT09 consoles feature VT02 games as well. What's with the numbers, by the way? Is there a reason why they make no sense numerically?

NewRisingSun

  • Sr. Member
  • ****
  • Posts: 289
    • View Profile
VTxx Dumping Thread
« Reply #36 on: February 02, 2018, 04:07:16 PM »
FC Pocket 600-in-1 register $411D: If bits 0 and 1 are set, then it's a CNROM latch at $8000-$FFFF.
@davidstech: Could you please check whether game #61 (Gauntlet) runs properly (as in the player not being able to walk through walls) on real hardware? That game uses 4-screen mirroring, and I have no idea how that would be enabled.
« Last Edit: February 02, 2018, 04:08:45 PM by NewRisingSun2 »

davidstech

  • Full Member
  • ***
  • Posts: 140
    • View Profile
    • http://ds0.me
VTxx Dumping Thread
« Reply #37 on: February 02, 2018, 04:07:19 PM »
Yes. I'm pretty sure every chipset on that list is Famicom compatible, the only possible exception is the VT368/9. No idea about the numbering either.

Based on what I can see of the die of chipset of the M320 (I didn't manage to get it out cleanly, but I was able to get of a photo of enough of it), I'm pretty sure it's identical to the 555 chipset used in the SY-88x series.
Unfortunately the FC Pocket isn't working any more after dumping, so I can't check #61.
Update: UNROM and CHR RAM is working in my MAME now, I'll add MMC1 and CNROM later.
« Last Edit: February 02, 2018, 04:42:31 PM by davidstech »

forgotusername

  • Full Member
  • ***
  • Posts: 129
    • View Profile
VTxx Dumping Thread
« Reply #38 on: February 02, 2018, 05:54:03 PM »
Just adding that I've successfully ripped (to my knowledge) every unique game off the 638 in 1 (excluding an unsuccessful Foot Ball). Just saying it before someone else does it too.

kelvin donna

  • Sr. Member
  • ****
  • Posts: 462
  • Company Name: Satervest
    • View Profile
VTxx Dumping Thread
« Reply #39 on: February 02, 2018, 05:56:42 PM »
forgotusername
Feb 2 2018, 05:54:03 PM
Just adding that I've successfully ripped (to my knowledge) every unique game off the 638 in 1 (excluding an unsuccessful Foot Ball). Just saying it before someone else does it too.[/quote]wait, what nes football game, do you know, where you have this from?  :huh:
i'm proud of being an INGSOC Citizen

NewRisingSun

  • Sr. Member
  • ****
  • Posts: 289
    • View Profile
VTxx Dumping Thread
« Reply #40 on: February 02, 2018, 06:06:41 PM »
That's quite fast. What tools did you use? Did you analyse the menu code to find individual game sizes and starting points? Or did you skip every game that was already ripped from other multicarts?

forgotusername

  • Full Member
  • ***
  • Posts: 129
    • View Profile
VTxx Dumping Thread
« Reply #41 on: February 02, 2018, 06:22:55 PM »
NewRisingSun2
Feb 2 2018, 06:06:41 PM
That's quite fast. What tools did you use? Did you analyse the menu code to find individual game sizes and starting points? Or did you skip every game that was already ripped from other multicarts?[/quote]Just the FCEUX editor. This one was easy because the graphics are viewable in Tile Layer Pro (usually they're compressed), so I could just copy-and-paste them instead of searching for them in the multicart. And yeah I skipped over duplicates, eventually I might go back and get the ones with different copyright screens and whatnot.
Quote:
 
wait, what nes football game, do you know, where you have this from?  :huh:[/quote]
It's one I've never seen before - it's a hack of the Intellivision football game (American football, not soccer). I can give you the ROM, but like I said its broken.

NewRisingSun

  • Sr. Member
  • ****
  • Posts: 289
    • View Profile
VTxx Dumping Thread
« Reply #42 on: February 02, 2018, 06:35:14 PM »
Well, I'm going to call it a day. Here is my progress so far. Use mapper 270 for FC Pocket 638-in-1 (and the two split ROMs), mapper 296 for DGUN-2573 and FC Pocket 472-in-1 (has the extra 128 game cartridge been posted?). I have not made any progress on 246 in 1 MOGIS M320 (VTxx) unfortunately.

kelvin donna

  • Sr. Member
  • ****
  • Posts: 462
  • Company Name: Satervest
    • View Profile
VTxx Dumping Thread
« Reply #43 on: February 02, 2018, 06:44:52 PM »
forgotusername
Feb 2 2018, 06:22:55 PM
NewRisingSun2
Feb 2 2018, 06:06:41 PM
That's quite fast. What tools did you use? Did you analyse the menu code to find individual game sizes and starting points? Or did you skip every game that was already ripped from other multicarts?[/quote]Just the FCEUX editor. This one was easy because the graphics are viewable in Tile Layer Pro (usually they're compressed), so I could just copy-and-paste them instead of searching for them in the multicart. And yeah I skipped over duplicates, eventually I might go back and get the ones with different copyright screens and whatnot.
Quote:
 
wait, what nes football game, do you know, where you have this from?  :huh:[/quote]
It's one I've never seen before - it's a hack of the Intellivision football game (American football, not soccer). I can give you the ROM, but like I said its broken.[/quote]good idea, give it to me  :)
i'm proud of being an INGSOC Citizen

forgotusername

  • Full Member
  • ***
  • Posts: 129
    • View Profile
VTxx Dumping Thread
« Reply #44 on: February 02, 2018, 06:51:13 PM »
kelvin donna
Feb 2 2018, 06:44:52 PM
good idea, give it to me  :) [/quote]

Attachments: