Imaging the Genesis chips

Moderators: Mug UK, Zorro 2, spiny, Greenious, Moderator Team

Post Reply
lordkain
Atarian
Atarian
Posts: 1
Joined: Sat Mar 21, 2020 4:20 pm

Imaging the Genesis chips

Post by lordkain »

I have planned to image the different chips from the Megadrive/Genesis system, including the ones found in games.

First chip imaged is 315-5709 and images are available here: https://www.dropbox.com/sh/4dvga2jt19rg ... 25UOa?dl=0
This is the SSF2 mapper, not the most useful chip but that's a start.

Unfortunately I am not able to use software I have for automatic netlist extraction because that would require SEM images and these
are tricky to produce for old chips like this one. The lack of planarization makes deprocessing a bit harder and optical images are
easier to produce. Still, the chip can definitely be reverse engineered from the images.

I thought some of you might be interested in working on this so I have decided to publish the images.

Have fun!
slingshot
Fuji Shaped Bastard
Fuji Shaped Bastard
Posts: 2254
Joined: Mon Aug 06, 2018 3:05 pm

Re: Imaging the Genesis chips

Post by slingshot »

I think the most interesting would be the 315-5364. Precise bus timings are still not well-known.
User avatar
jotego
Captain Atari
Captain Atari
Posts: 264
Joined: Wed May 04, 2016 10:02 am
Location: Valencia (Spain)
Contact:

Re: Imaging the Genesis chips

Post by jotego »

slingshot wrote:I think the most interesting would be the 315-5364. Precise bus timings are still not well-known.
I agree.

This is a great iniciative. Please go on with it :-D
--
Source code of all my cores here.
My Patreon page here.
User avatar
Cyprian
10 GOTO 10
10 GOTO 10
Posts: 2229
Joined: Fri Oct 04, 2002 11:23 am
Location: Warsaw, Poland

Re: Imaging the Genesis chips

Post by Cyprian »

I tried to open one of that jpg with XNview but it only shows me "note enough memory".
I have 8GB RAM
Mega ST 1 / 7800 / Portfolio / Lynx II / Jaguar / TT030 / Mega STe / 800 XL / 1040 STe / Falcon030 / 65 XE / 520 STm / SM124 / SC1435
DDD HDD / AT Speed C16 / TF536 / SDrive / PAK68/3 / Lynx Multi Card / LDW Super 2000 / XCA12 / SkunkBoard / CosmosEx / SatanDisk / UltraSatan / USB Floppy Drive Emulator / Eiffel / SIO2PC / Crazy Dots / PAM Net
Hatari / Steem SSE / Aranym / Saint
http://260ste.atari.org
Gehstock
Captain Atari
Captain Atari
Posts: 469
Joined: Wed Dec 21, 2016 7:18 pm
Location: EastGermany

Re: Imaging the Genesis chips

Post by Gehstock »

Post Reply

Return to “FPGA Chat”