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Rich,<br>
<br>
The Dual IDE board sits on the N8VEM bus, which should only be
slightly slower than the IDE bus on the Mark IV. Both will
experience the same I/O timing, but the Dual IDE board has more
levels of logic between the CPU and the CF cards. With sufficiently
fast chips on board to do the I/O decode, pass data, and perform the
chip selects, including R/W, it should run the 8-bit interface at
the same speed as the Mark IV. I/O instruction limitations probably
mean that the 16-bit mode is the same speed as the 8-bit mode, since
everything has to narrow down to the same I/O pipe.<br>
<br>
--John<br>
<br>
<br>
<br>
On 05/31/2015 01:35 PM, Richard Cini wrote:
<blockquote
cite="mid:2DDB2FC8-21BA-4D03-A6D5-***@verizon.net"
type="cite">
<meta http-equiv="content-type" content="text/html;
charset=ISO-8859-1">
<div>I'm using LS for everything other than the 646 chips. Speed
seems very good but I can't think of a way to benchmark it
officially. <br>
<br>
Sent from my iPhone</div>
<div><br>
On May 31, 2015, at 4:25 PM, John Coffman <<a
moz-do-not-send="true" href="mailto:***@gmail.com">***@gmail.com</a>>
wrote:<br>
<br>
</div>
<div><span></span></div>
<blockquote type="cite">
<div>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Rich,<br>
<br>
I finished soldering the Dual IDE 2.0 board last night. I
finally got around to stuffing the chips and testing it this
afternoon. The A connector checks out fine with Master &
Slave CF cards.<br>
<br>
I stuffed this board with largely ALS components. It runs on
the Mark IV at 36Mhz, 1 memory ws (normal), and 3 I/O wait
states. I usually run at 36 Mhz with 4 I/O wait states, so 3
is a bonus. 2 I/O w.s. does not work with some CF cards.
This is a speed advantage over the 1.0 board, stuffed with
only LS logic.<br>
<br>
Recommendation: upgrade to ALS for best Mark IV performance.<br>
<br>
--John<br>
<br>
<br>
<br>
<br>
On 05/21/2015 05:18 PM, Richard Cini wrote:
<blockquote cite="mid:D183ECCB.1521B%***@verizon.net"
type="cite">
<div>
<div>
<div>All —</div>
<div><br>
</div>
<div><span class="Apple-tab-span" style="white-space:
pre;"> </span>The Dual IDE boards arrived today.
I’m going to try to build one tomorrow, but overall,
they look good. Over the weekend I’ll start staging
the packages and soliciting payments. Usual pricing
— $20 each plus S/H (in the US, I ship Priority
Mail, so shipping is usually $5 or $6).</div>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
Rich,<br>
<br>
I finished soldering the Dual IDE 2.0 board last night.
I finally got around to stuffing the chips and testing
it this afternoon. The A connector checks out fine with
Master & Slave CF cards.<br>
<br>
I stuffed this board with largely ALS components. It
runs on the Mark IV at 36Mhz, 1 memory ws (normal), and
3 I/O wait states. I usually run at 36 Mhz with 4 I/O
wait states, so 3 is a bonus. 2 I/O w.s. does not work
with some CF cards. This is a speed advantage over the
1.0 board, stuffed with only LS logic.<br>
<br>
Recommendation: upgrade to ALS for best Mark IV
performance.<br>
<br>
--John<br>
<br>
<br>
<br>
<br>
On 05/21/2015 05:18 PM, Richard Cini wrote:
<blockquote
cite="mid:D183ECCB.1521B%***@verizon.net"
type="cite">
<div>
<div>
<div>All —</div>
<div><br>
</div>
<div><span class="Apple-tab-span"
style="white-space: pre;"> </span>The Dual
IDE boards arrived today. I’m going to try to
build one tomorrow, but overall, they look good.
Over the weekend I’ll start staging the
packages and soliciting payments. Usual pricing
— $20 each plus S/H (in the US, I ship
Priority Mail, so shipping is usually $5 or $6).</div>
<div><br>
</div>
<div>Thanks!</div>
<div><br>
</div>
<div>
<div>Rich</div>
<div><br>
</div>
<div>--</div>
<div>Rich Cini</div>
<div>Collector of Classic Computers</div>
<div>Build Master and lead engineer, Altair32
Emulator</div>
<div><a moz-do-not-send="true"
href="http://www.classiccmp.org/cini">http://www.classiccmp.org/cini</a></div>
<div><a moz-do-not-send="true"
href="http://www.classiccmp.org/altair32">http://www.classiccmp.org/altair32</a></div>
</div>
</div>
</div>
<div><br>
</div>
<span id="OLK_SRC_BODY_SECTION">
<div style="font-family: Calibri; font-size: 11pt;
text-align: left; color: black; border-width: 1pt
medium medium; border-style: solid none none;
border-color: rgb(181, 196, 223)
-moz-use-text-color -moz-use-text-color; padding:
3pt 0in 0in;"><span style="font-weight: bold;">From:
</span> Don Caprio <<a moz-do-not-send="true"
href="mailto:***@gmail.com">***@gmail.com</a>><br>
<span style="font-weight: bold;">Reply-To: </span>
N8VEM-Post <<a moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a>><br>
<span style="font-weight: bold;">Date: </span>
Thursday, April 30, 2015 at 10:29 PM<br>
<span style="font-weight: bold;">To: </span>
N8VEM-Post <<a moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a>><br>
<span style="font-weight: bold;">Subject: </span>
Re: [N8VEM: 19558] Dual IDE 2.0-006 Order Summary<br>
</div>
<div><br>
</div>
<div>
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http-equiv="Content-Type">
<div text="#000000" bgcolor="#FFFFFF"> Rich,<br>
<br>
Please put me down for one.<br>
<br>
<div class="moz-cite-prefix">On 04/27/15 06:10
PM, Richard Cini wrote:<br>
</div>
<blockquote
cite="mid:D1645649.13F95%***@verizon.net"
type="cite">
<div>
<div>
<div>All —</div>
<div><br>
</div>
<div><span class="Apple-tab-span"
style="white-space: pre;"> </span>Ok,
here’s the order list so far. If
I’ve missed anyone, please let me
know. But, don’t worry, I will order a
decent-sized quantity so I can have them
on-hand.</div>
<ul>
<li>JohnC – 1</li>
<li>TomL – 1</li>
<li>MaxS – 2</li>
<li>Yoda – 2</li>
<li>FabioB – 3</li>
<li>IanM – 2</li>
<li>LarsN – 1</li>
<li>PaulB – 1</li>
<li>WayneW – 2</li>
<li>GBeat – 1</li>
<li>MalcomR - 2</li>
</ul>
<div><br>
</div>
<div><span class="Apple-tab-span"
style="white-space: pre;"> </span>Ok,
that’s 18 boards so far. I’ll let
this run for another few days and then
order them at the end of the week.
Thanks for all of the interest in this
board.</div>
<div><br>
</div>
<div>
<div>Rich</div>
<div><br>
</div>
<div>--</div>
<div>Rich Cini</div>
<div>Collector of Classic Computers</div>
<div>Build Master and lead engineer,
Altair32 Emulator</div>
<div><a moz-do-not-send="true"
href="http://www.classiccmp.org/cini">http://www.classiccmp.org/cini</a></div>
<div><a moz-do-not-send="true"
href="http://www.classiccmp.org/altair32">http://www.classiccmp.org/altair32</a></div>
</div>
</div>
</div>
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<pre class="moz-signature" cols="72">--
Don Caprio
<a moz-do-not-send="true" class="moz-txt-link-abbreviated" href="mailto:***@gmail.com">***@gmail.com</a></pre>
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