ZX81 and 6116

From: Richard Erlacher <edick_at_idcomm.com>
Date: Tue Mar 26 07:31:28 2002

If there's a configuration for the 2016, that should work OK with the 6116,
shouldn't it? It's well to keep in mind that it doesn't matter WHICH address
line goes to which address pin on the SRAM, only that it goes to an address
pin. Of course, some designs use addresses as chip selects, since they don't
use all of the address space. In those cases it's important to pay attention
to the association between addresses and the memory map.


----- Original Message -----
From: "Glen Goodwin" <acme_ent_at_bellsouth.net>
To: <classiccmp_at_classiccmp.org>
Sent: Monday, March 25, 2002 9:59 PM
Subject: Re: ZX81 and 6116

> > From: Hans Franke <Hans.Franke_at_mch20.sbs.de>
> > I think Pete is right here. there was a wire you had to add if
> > you used a 4118 (or 6116) instead of the 2114s. I have to grab
> > the kit documentation to veryfy this.
> After checking the schematic I find that there is a link. "Use L1 for 1K
> RAM, use L2 for 2K RAM." This tells me that when a 4118 or two 2114s are
> used (or a 6116???) there is no need to change the jumper -- it's only
> required when using a 2KB 2016 or equivalent.
> > Digging thru my ZX Stuff I found an _original_ "ZX81 2-K RAM" Kit *G*
> > Well, it is at least original over here, since it has been sold by ISS,
> > the official distributor of ZX81 stuff in Germany.
> Wow -- did you ever use the kit?
> > The kit konsists of a 24 pin socket and a NEC D446C-2 RAM
> I'd guess this is the same as the 2016, and that you need to change the
> link to L2 for it to work.
> Glen
> 0/0
Received on Tue Mar 26 2002 - 07:31:28 GMT

This archive was generated by hypermail 2.3.0 : Fri Oct 10 2014 - 23:35:13 BST