RE: D9090 ROM images uploaded to

From: William Levak (
Date: 1999-10-09 06:37:10

On Thu, 7 Oct 1999, Ethan Dicks wrote:

> > The manual says this has a 2900 series bit/slice processor(whatever that
> > is).
> The AMD 2900 was a 4-bit ALU (among other things) that was in common usage
> in the early 1980s for implementing just about anything you wanted to.  I
> have seen eight of them ganged together to implement the VAX-11/730 and four
> of them in the vector coprocessor of the 6502-based arcade game Battlezone.
> > Page 6 of the schematics(188008) show what looks like a processor
> > and 4 memory chips.  However, the lettering on the schematics is
> > unreadable.  The numbers from these chips would help.

So, maybe that's actually 5 AM2900s in parallel.  That would make it a 20
bit processor.

For AM2900 data sheets see:

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