Building my own classic style computer update - test-drb@ccmp.vtda.org

24 Aug 2007

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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.
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 > NEC D770008AC-6 
You sure of that number?
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   NEC D4364C-15L

I guess that's a 64K*1 DRAM, similar to a 4164 
Might be mask rom if 24/28 pin.
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   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.
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 > NEC D449C 
6116 ram 2kx8
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   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.
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   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