Author Topic: Retro Station NX-85 1280-in-1 (GameStation 5)  (Read 963 times)

Tygerbug

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Retro Station NX-85 1280-in-1 (GameStation 5)
« on: September 11, 2022, 04:27:55 PM »
Sean Riddle writes: "I dumped the Retro Station NX-85 1280-in-1.  Along with the normal 44 pads, there were 3 more address lines at the top.  They aren’t marked, so I have 8 dumps but I don’t know what order they should be in.  I assume Haze can figure it out by examination or trial and error."

https://archive.org/details/retro-station-nx-85
https://www.youtube.com/watch?v=0QWX8AZDc8s

(This is a 1280-in-1 system so there's a lot of data in here- 256 MB in fact- but the Pikachu Gardman game should be in this dump .... somewhere. )

Many NES graphics are visible in the binaries, but sometimes they appear to be bit-shifted in some way, like the attached picture.

177300 in the 97 binary is Snoopy's Silly Sports Spectacular, and 1c6ABf0 is Bugs Bunny's Crazy Castle -- in both cases these are very glitchy in YY-CHR, suggesting bit shift or bit reversal.

I will compare the hex here to the actual Snoopy ROM. 176B000 is snoopy with his medals, the CHR before the one with Charlie Brown .... this would be 2B010 in the ROM proper ...

03 1F 2F 6F F7 F7
would I think become:
14 97 D6 F6 7F 7F


It's therefore verifiable that Pikachu Wonder Rabbit is in binary 96 from around 135FF00 -- 13A1F00, something like that, but glitched consistently in this way.

1388000 in binary 96 is a glitched version of the HUD used in Pikachu Gardman (my hack) at 048010.

1398000 in binary 96 has the Pikachu player graphics, present in the Pikachu Gardman hack at 058010. It's consistent

1385000 is probably the title screen, matching Gardman at 45010



The CHR can almost certainly be find and replaced, based on a comparison of the data in other games like Snoopy's Silly Sports Spectacular, seen above. It's clear that every hex number is being replaced with a different "reversed" version of itself consistently.

For safety's sake, I should probably be comparing it with Gardman, or the Pikachu Gardman hack, where most but not all of the graphics are identical.


So I find and replaced some of the numbers, creating a less glitched but still glitched version ....
« Last Edit: September 12, 2022, 03:25:40 PM by Tygerbug »

Tygerbug

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Re: Retro Station NX-85 1280-in-1 (GameStation 5)
« Reply #1 on: September 11, 2022, 10:40:41 PM »
Partial byte correction table attached for fixing some of the CHRs .... and a complete (?) version by Bavi_H.


According to Sean, bits 0 and 4, 1 and 2, 3 and 7, and 5 and 6 are swapped.

The PRG and CHR are on the same chip and were dumped with the same connections.

I spent ages doing a find and replace and only got partway, but there's an older EPROM Pin Swap Tool here which corrected it.

https://forums.nesdev.org/viewtopic.php?t=20122&start=15


via Sean Riddle, Bavi_H, lidnariq, Farid
« Last Edit: September 12, 2022, 01:55:29 AM by Tygerbug »

TheBoxGamePL

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Re: Retro Station NX-85 1280-in-1 (GameStation 5)
« Reply #2 on: September 13, 2022, 06:00:32 AM »
I would like someone to create a dump Forever Duo Games 852 in 1