Building my own classic style computer update

[Allison]

>
>Subject: Re: Building my own classic style computer update
>   From: ard at p850ug1.demon.co.uk (Tony Duell)
>   Date: Fri, 24 Aug 2007 23:52:47 +0100 (BST)
>     To: cctalk at classiccmp.org
>
>> 
>> I have been scrounging for parts for my computer, and I believe I have hit
>> the jackpot. A friend of mine set me up with some older Seiko control system
>> boards, various revisions, from the late 80s. On them are many ICs,
>> including RAMs, Z80 CPUs, and PIOs, as well as some AMD Arithmetic
>> processors, a Z80 SIO/2, and other various components. I want to try to make
>> my computer from these components. Can anyone point me in a good direction
>> for the datasheets, preferably online, for these mostly obsolete ICs? Some
>> of them I don't even know what they are, and some I cannot find online,
>> presumably because they are obsolete. Here's a partial list of them:
>> NEC D780C
>
>AFAIK it's an exact equivaletn of a Z80 CPU. I've never found a circuit 
>that works with one and not the other.

It is an exact bug for bug and hidden opcode match for Z80/MK3880.


>> NEC D770008AC-6

You sure of that number? 

>> NEC D4364C-15L
>
>I guess that's a 64K*1 DRAM, similar to a 4164

Might be mask rom if 24/28 pin.


>> NEC D8251AC
>
>Equivalent to the Intel 8251, National Semiconductor INS8251, etc. It's a 
>USART

There are differnt flavors of the 8251, and the D8251AC is similar to the 
intel 8251A.  It's a matter of different bugs.


>> NEC D449C

6116 ram 2kx8

>> AMD AM9511A-1DC
>
>AMD floating point chip
>
>> Sharp LH0081A
>> Sharp LH0082
>
>No idea
>
>> Intel 8339
>> Intel 8325
>
>Are you sure you've not given me the date codes?

Those are either mask roms or date codes.


>> Intel K3235001
>
>No diea

Thats a mask and date code. Not a part number.


Just google "z80" there are a carload of sites for those parts
and people playing with them.

Allison