10 Jan
2006
10 Jan
'06
3:15 p.m.
From: "Chuck Guzis" <cclist at
sydex.com>
On 1/10/2006 at 1:08 PM Dwight Elvey wrote:
Hi Chuck
I was thinking you had information on one of the controller boards
based on the 8X300 with the WD11xx parts. I've already gotten
enough information on both the WD11xx and the 8X300 to create
a simple disassembler. I also needed some hardware specific
inputs because the board I'm looking at does specific hardware
fuctions based on the address that the 8X300 is executing
( similar to many bit slice designs ). This required a custom
disassembler.
I'm told that the TRS-80 Model4 used these parts for their
hard disk controller. From looking at the code I have extracted
Sorry for the late response. This was from the
begining of
October. Can you look into your manual and see if it has
the 8X300 controller chip with the WD11xx support chips?
If so, I'd be interested in a copy of it.
Hi Dwight,
Well, yes and no. The WD book doesn't have a thing on the 8X300 or 305
because it's not a WD part, but rather a Signetics part! I do have the
Signetics "Bipolar LSI Data Manual" which does detail both the 300 and 305;
is that what you're looking for?
Cheers,
Chuck
from the Olivetti board, I'd say they didn't
modify the
code from WD's original application notes. I'd suspect the
same for the TRS-80 controller as well. I noticed that there
is a reset action that doesn't effect the M20's controller since
it is used for DMA circuits that are not even connected
in this controller. I suspect this was in the original app note.
I'll have to do a little net digging on the TRS-80. I suspect
I'll come up with the controller commands from the computer
side. These are what I'm actually looking for.
Dwight