32X Schematics

ob1 · Post by **ob1** » Thu Jan 29, 2009 3:43 pm

Hey.
Has anyone opened its 32X to see/draw its internal schematics ?
It would help us to have a better understanding of what lies inside this silly mushroom.

TmEE co.(TM) · Post by **TmEE co.(TM)** » Fri Jan 30, 2009 10:46 am

With a ultr@ compact 4 layer PCB, forget it

ob1 · Post by **ob1** » Fri Jan 30, 2009 11:34 am

Damn'

OK.
But maybe we could have something more simple as :

Code: Select all

+-----+
| CPU |    +------------+
+--+--+    |            |     +-------+
   +----+--|   SDRAM    |  +--+  VDP  |
+--+--+ |  |            |  |  +-------+
| CPU | |  +------------+  |
+-----+ |                  |
        +----------------+-+
        |                |
      +-------+      +-------+
      | DRAM  |      | DRAM  |
      +-------+      +-------+

Especially, if this is the case, if there's actually 2 SDRAM chips, taht would means the 32X main meory could be 32-bits (2 x 16bits) wide.

TmEE co.(TM) · Post by **TmEE co.(TM)** » Fri Jan 30, 2009 11:50 am

In the Sega docs, there is a fairly accurate block diagram with ASIC names...

ob1 · Post by **ob1** » Fri Jan 30, 2009 11:55 am

I didn't believe this 32X Block diagram would be that accurate.
Anyway, thank you tµEE.

Chilly Willy · Post by **Chilly Willy** » Fri Jan 30, 2009 12:33 pm

I bought a 32X just to disassemble (I didn't trust taking apart the 32X I actually used). The block diagram in the 32X doc is accurate. It's exactly what's there as far as the chips go. Given the block diagram and the explanation of the 32X we have these days, I don't see what good a schematic would do unless you were looking to do something like make an NTSC/PAL switch or something.

ob1 · Post by **ob1** » Fri Jan 30, 2009 12:42 pm

Chilly Willy wrote:The block diagram in the 32X doc is accurate.

We happy
:)