16 Sep
2009
16 Sep
'09
7:05 a.m.
----------------------------------------
Date: Wed, 16 Sep 2009 10:15:17 +0200
From: lehmann at ans-netz.de
To: cctalk at classiccmp.org
Subject: Re: Zilog System 8000
dwight elvey wrote:
Hi Oliver
Well, it is not just a WD1000 controller connected to the bus
with a bus buffer. The address register tells me that it is a
DMA controller. Although, the WD1000 controller can be connected
to a DMA controller, it can also be used in a polled mode.
You'd need to build a smart interface between the WD1000 and
the S8000 bus. It could be done with some PIC or other small
uP. You'd still need to build the DMA controller.
Dwight
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Hi TOny
You are correct. The way it read to me was that it was a
WD1000 type controller, not that it was actually a SA1000
disk because he specified a specific disk type.
Maybe the OP can be more specific.
Dwight
There is a hardware reference manual here:
http://bitsavers.org/pdf/zilog/s8000/03-3237-04_hwRef_Dec82.pdf
- On page 32 you'll see the specifications of the shipped 33MB Winchester
drive
- On page 47 you'll see the signals of the WDC controller listed which
are attached to the so called "FINCH adapter board".
- On the pages 65-67 you'll see how this harddisk has to be attached to
the FINCH adapter board and how this is to be connected to the WDC
controller.
- On the pages 109-119 you'll find the theory of operation..
From the figure on page 65 I assume, that it is a
SA100 interface.