Jump to content
Sign in to follow this  
Gabriel LP

I have 2 atari games MADE IN MEXICO.

Recommended Posts

Hello Community:

I bought recently 2 atari 2600 games, Kangaroo and Mr. Do!, they came with PAL16L8 and MBM2764 eprom, my problem is that the binary files from internet and the DUMP from the g ames i own are TOTALLY diferent.... can somebody help me with that? I CAN´T dump the PAL16L8, thanxs.

WhatsApp Image 2021-07-19 at 8.42.25 PM.jpeg

WhatsApp Image 2021-07-19 at 8.42.23 PM (1).jpeg

WhatsApp Image 2021-07-19 at 8.42.23 PM (2).jpeg

WhatsApp Image 2021-07-19 at 8.42.23 PM (3).jpeg

WhatsApp Image 2021-07-19 at 8.42.23 PM.jpeg

WhatsApp Image 2021-07-19 at 8.42.24 PM.jpeg

Kangaroo 64k.BIN Mr. DO 64k.BIN

Share this post


Link to post
Share on other sites

With the Pal cart, shouldn't that window be covered? Is it possible over time it got erased for being open?

Share this post


Link to post
Share on other sites

Those boards swap around the data and address signals going to the eprom, and therefore the rom programmed in there has to be "scrambled" in such a way that will appear correct when read from the cartridge port. Both the bits in each byte as well as the order of the bytes has been altered. That's why they are so different (and why they don't work in an emulator), if you dump them directly from the chips.

a26_mex_board.thumb.jpeg.61a47b701aa83b451a5a1e5635ec06fc.jpegeprom.thumb.png.8c09dde4d706f59c34117994422bf05a.png


Here are the roms rearranged to match what the CPU in the Atari would actually see when those carts are plugged in (and this is what you would get by using a cartridge dumper). These can be run on emulators, flashcarts or burned on standard carts.

Mr._DO.binKangaroo.bin

Only a few bytes differ between these and the original NTSC roms.

 

  • Like 3

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

  • Recently Browsing   0 members

    No registered users viewing this page.

×
×
  • Create New...