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[gc8tech]

Hello,
I notice there is a lot of help in here for people still using Super Wild Card units. I had one many years ago.. but now getting back into them for more sentimental reasons.

But i'd love to expand both my DX and DX2 units to 64MB if possible.

Has anyone go a pic or 2 of a memory board with 64MB attached?? Not sure if i need to mod any of the GAL/PALs etc as well.

Thanks for your help,

T.

[Mystic_Merlin]

Hello, The DX can't have more than 32MB, you can check some pics of the memory board here:
https://www.nightfallcrew.com/26/04/2012/super-wildcard-swc-dx-32mb-front-fareast/?nggpage=2

The DX2 is using a GAL on the 64MB board and so far it hasn't been reversed engineered

[gc8tech]

Well thats a bugger.

I'll leave my DX alone then...

Does anyone have a pic of the 64MB Super Wildcard DX2 Memory board??

I'd love to see it.

If i had one.. i could use the GAL/PAL brute force dumper i'm going to build on it.

[Mystic_Merlin]

I would have taken a picture but my DX2 is also a 32M so I'd be interested if you can reverse that PAL/GAL/PEEL.
You can see a snapshot of it on this video but it's not gonna help:
https://www.youtube.com/watch?v=C31FE-aqnQE&t=122s

When you mention a PAL brute force dumper, are you referring to something like that?:
https://github.com/DuPAL-PAL-DUmper/DuPAL_Board/tree/master/board/DuPal_DIP

I've been keeping an eye an an easy solution to generate JED files from protected PAL by reading all its I/O but so far there seem no be none available.
Is this something you've done in the past?

[gc8tech]

The Brute Force adaptor i'm building is this...
http://dreamjam.co.uk/emuviews/readpal.php

There is also a second one i want to build that does more chips.

I have a ton of game carts that have security locked Pal/Gals... so need a way to dump and preserve them.

[gc8tech]

Are there any schematics for ANY of the wild cards?? Or the Gate array fuse maps for the PLD/CPU on the SWC units?? Any tech data like that??

Attached is all i can find...

Or should i open a new thread to ask about this??

Thanks everyone for helping me out.

[gc8tech]

Another tech thing i have found is there are 2 different revision (maybe even 3) of the DX version.

Both i think have the goldstar floppy chip.. but one allows 1mb SRAM chip / Run the DX96 bios fine.

The second (older) one doesn't have enough pins on the sram for 1mb.. BUT i can get DX95 bios to run on it.. But NOT the DX 96 BIOS to run. I have even checked the 96ROM chip/eprom in the new rev and it works fine.

But the old rev refuses to boot.
Its the same amd 27c020 eprom in 120ns (original chip is 150ns).

[dotdotdotz]

Not sure if anyone needs this, I had a badly corroded 32MB memory board and in the process of sanding it down to repair the traces I took a few scans

Hope it helps somebody!

https://drive.google.com/file/d/1gLKlQcTUygTh6EONBaEtH99Z2G-6kWO0/view?usp=drive_link

[pc741]

Super Wild Card DX 64 Mbit DRAM Expansion Board – Can a Standard 32 Mbit DX Be Upgraded by Adding More DRAM?

These photos show a 64 Mbit DRAM expansion board for the Super Wild Card DX.

The main unit is dated December 26, 1995, so this appears to be a late-production revision of the DX.

This expansion board has 64 Mbit of DRAM. What I find particularly interesting is the difference between the standard 32 Mbit board and this later 64 Mbit board.

The standard 32 Mbit DX DRAM board uses a 46-pin connector, while this later 64 Mbit DRAM expansion board uses 50 pins.

It also has a PALCE20V8H programmable logic device installed on the expansion board.

What I would really like to know is:

On a standard Super Wild Card DX that originally has 32 Mbit of DRAM, is it possible to upgrade it to 64 Mbit simply by adding or replacing the DRAM chips?

Or does the DX require additional hardware, such as the PALCE20V8H, the additional four connector pins, or other logic circuitry, in order to properly address and access the additional memory?

In other words, is the 64 Mbit capability already supported by the DX mainboard, with the expansion board simply providing the additional DRAM, or does the 64 Mbit version require a different memory-control design?

This particular 64 Mbit board belongs to a friend of mine, so I don't want to experiment on it and risk damaging it.

If anyone has worked with the late-revision 64 Mbit Super Wild Card DX before, I would really appreciate any information about how the additional DRAM is connected and what the PALCE20V8H is doing.

Schematics, pinouts, photographs, reverse-engineering information, or personal experience would be extremely helpful.

Thank you!