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Kip,<br>
<br>
Yes, I have occasionally broken a pin that way. At least the glue
chips are cheap.<br>
<br>
There would seem to be the most metal fatigue where the pin exits
the plastic housing; it has already been bent at a right angle
during manufacture. So avoid any bending backward at that point
(this is where it will usually break). I use needle nose pliers to
do the bend 1-2mm outside of the plastic housing.<br>
<br>
Ceramic DIPs could be another matter. I rewired a uPD7220 graphics
board several years ago, but I never touched the pins on the 7220
itself. It was, by contrast, an expensive DIP.<br>
<br>
--John<br>
<br>
<br>
<br>
On 01/22/2015 09:43 PM, Kip Koon wrote:
<blockquote cite="mid:00a701d036cf$7f40d5b0$7dc28110$@sc.rr.com"
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<div class="WordSection1">
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">John,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I tried correcting a trace when I was building
the 6x0x SBC ATX PCB by trying to bend up a pin on a 74LS06N
IC and broke the sucker off! I was quite peeved and
frustrated. I have not tried doing that since. The
picture of your fix to that board looked quite nice and I
thought easy to do. Somehow I tend to complicate things.Â
How do you accomplish bending up pins on an IC without
breaking the sucker off. When I was in my twenties, I did
some wirewrap work on a senior project in college so I’m
familiar with that. Now I need to learn how to bend up IC
pins a lot better than I’m doing now. Thanks for sharing
you experiences. <o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">Kip Koon<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><a moz-do-not-send="true"
href="mailto:***@sc.rr.com">***@sc.rr.com</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><a moz-do-not-send="true"
href="http://www.cocopedia.com/wiki/index.php/Kip_Koon">http://www.cocopedia.com/wiki/index.php/Kip_Koon</a><o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
</div>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);"><o:p> </o:p></span></p>
<div>
<div style="border-right: medium none; 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;">
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif"; color:
windowtext;">From:</span></b><span style="font-size:
10pt; font-family:
"Tahoma","sans-serif"; color:
windowtext;"> <a class="moz-txt-link-abbreviated" href="mailto:***@googlegroups.com">***@googlegroups.com</a>
[<a class="moz-txt-link-freetext" href="mailto:***@googlegroups.com">mailto:***@googlegroups.com</a>] <b>On Behalf Of </b>John
Coffman<br>
<b>Sent:</b> Thursday, January 22, 2015 9:11 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:***@googlegroups.com">***@googlegroups.com</a><br>
<b>Subject:</b> Re: [N8VEM: 19247] Re: An MC68030 SBC
Design<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Kip,<br>
<br>
I'm sure your dentist would not approve of using teeth; but if
finger nails work, consider that generally you don't have too
many patch wires to attach.<br>
<br>
I still use wire strippers, but I have a pair with an
adjusting screw that prevents them from closing down all the
way. I still get nicked and then broken wires from time to
time, so I'm not following my own advice. Often, I don't cut
the insulation all the way through to the wire; just far
enough that a tug will break the part to be removed free from
the wire. This can be tricky with very short wires, though.<br>
<br>
Avoiding those nicks in such tiny wire is most important, as,
I gather, you have learned.<br>
<br>
BTW: I've installed fixes to board another way, all on the
top of the board. Rather than cut a trace, remove an IC from
the socket and bend the offending pin upward. Upon replacing
the IC, this makes a post to attach a wire to using a hand
wire-wrap tool. Connections can be made (#30 wire) by
inserting the wire into a socket so that an existing IC pin
clamps it against the socket contact. (This works for dual
wipe sockets, but not for machined-tool sockets.) Attaching a
wire to a socket where a pin has been bent up is another
matter. Often the contact wipes no longer come together. In
this case, often the wire can be clipped between the plastic
housing and the outer wipe.<br>
<br>
Although some fixes absolutely require cutting traces and
soldering, the method of altering the connections between IC's
described above has proved to be simple, reliable, and quicker
than soldering.<br>
<br>
--John<br>
<br>
<br>
<br>
<br>
On 01/21/2015 11:49 PM, Kip Koon wrote: <o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif";">John,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif";">Very
interesting! What is the preferred method of stripping
tiny wirewrap wire in preparation for soldering. 31 gauge
is so small that I think I just used my teeth or finger
nails when I did the first Multicomp PCB.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif";"> </span><o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";">Kip Koon</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";"><a
moz-do-not-send="true"
href="mailto:***@sc.rr.com">***@sc.rr.com</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";"><a
moz-do-not-send="true"
href="http://www.cocopedia.com/wiki/index.php/Kip_Koon">http://www.cocopedia.com/wiki/index.php/Kip_Koon</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";"> </span><o:p></o:p></p>
</div>
<p class="MsoNormal"><span style="font-size: 11pt; font-family:
"Calibri","sans-serif";"> </span><o:p></o:p></p>
<div>
<div style="border-right: medium none; border-width: 1pt
medium medium; border-style: solid none none; padding: 3pt
0in 0in; border-color: -moz-use-text-color;">
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif"; color:
windowtext;">From:</span></b><span style="font-size:
10pt; font-family:
"Tahoma","sans-serif"; color:
windowtext;"> <a moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a>
[<a moz-do-not-send="true"
href="mailto:***@googlegroups.com">mailto:***@googlegroups.com</a>]
<b>On Behalf Of </b>John Coffman<br>
<b>Sent:</b> Wednesday, January 21, 2015 5:32 AM<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a><br>
<b>Subject:</b> Re: [N8VEM: 19234] Re: An MC68030 SBC
Design</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><tt><span style="font-size: 10pt;">In
industrial practice, the use of sharp wire strippers that
can nick the wire is strictly forbidden. We used to use
"thermal" strippers, which consist of two hot Nichrome
wires that melt the insulation so it can be pulled off.
Actually, the hot stripper is faster and easier to use. I
have not seen one of these in many years.</span></tt><span
style="font-family: "Courier New
;","serif";"><br>
<br>
</span><tt><span style="font-size: 10pt;">FYI: the Apollo
guidance computer and the IBM System/360 computers, both
from the 1960s, were all wire-wrapped. Ten turns around a
sharp, square, gold-plated post gives 40 points of
contact. IBM found this to be an extremely reliable
method of connecting components; hence, its use on the
Apollo moon missions.</span></tt><span style="font-family:
"Courier New ;","serif";"><br>
<br>
</span><tt><span style="font-size: 10pt;">--John</span></tt><span
style="font-family: "Courier New
;","serif";"><br>
<br>
<br>
<br>
<br>
<br>
<br>
</span><span style="font-size: 10pt; font-family:
"Courier New";"><br>
</span>On 01/20/2015 11:24 PM, James Moxham wrote: <o:p></o:p></p>
<div>
<p class="MsoNormal"><span style="font-size: 13.5pt;">I like
the wire wrap wire too, and most of my boards have a few
corrections/links on them. I tend to leave the wires
longer than necessary so they can be moved out of the way
when working on one area and yes it looks like a rats nest
but it works fine.</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";">but
since it breaks so easily</span> ... <span
style="font-size: 13.5pt;">One comment about wires
breaking - stripping wire wrap wire with wire cutters it
is very easy to weaken the wire and then it breaks later
at this point. Years ago I got a wire wrapping tool that
had a stripper in it designed for this wire, and I don't
wire wrap now, but for point to point soldering with wire
wrap wire, that little stripper is extremely useful. I
don't know if you can still buy them anywhere?</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span style="font-size: 13.5pt;">Cheers,
James</span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">On Wed, 21 Jan 2015 17:44:51 +1030, Kip
Koon <a moz-do-not-send="true"
href="mailto:***@sc.rr.com"><***@sc.rr.com></a>
wrote:<o:p></o:p></p>
</div>
<blockquote style="border-width: medium medium medium 1.5pt;
border-style: none none none solid; padding: 0in 0in 0in 6pt;
margin: 5pt 0in 4.8pt; border-color: -moz-use-text-color
-moz-use-text-color -moz-use-text-color blue;">
<p class="MsoNormal"> <o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">Yoda,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">Thank you so much for your
advice. I really appreciate it. Since you are a veteran
at building these PCBs, I will apply your suggestions and
work on honing my PCB patching skills further. Thank you
again.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";">Kip Koon</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";"><a
moz-do-not-send="true"
href="mailto:***@sc.rr.com">***@sc.rr.com</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";"><a
moz-do-not-send="true"
href="http://www.cocopedia.com/wiki/index.php/Kip_Koon">http://www.cocopedia.com/wiki/index.php/Kip_Koon</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family: "Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";"> <a
moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a>
[<a moz-do-not-send="true"
href="mailto:***@googlegroups.com">mailto:***@googlegroups.com</a>]
<b>On Behalf Of </b>yoda<br>
<b>Sent:</b> Tuesday, January 20, 2015 10:52 PM<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a><br>
<b>Subject:</b> Re: [N8VEM: 19230] Re: An MC68030 SBC
Design</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Well wire wrap has a pretty tough
coating and that is what I have seen done professionally
and I have had no issues with it. I don't try to make
tight connections that is why mine look like a rat's nest,
but it is not brittle it is kynar which seems to be very
flexible. I think 20 gauge would be harder to route
around the board. You can get wire wrap wire in different
colors - it might not be as cheap as other wire but it
seems very reliable and I have a bunch around for doing
wire wrap boards which I don't do much any more.<o:p></o:p></p>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I generally order sockets in large
quantities - I think you see the 75 dollar minimum when
you start putting things into the cart for checkout. I
generally have 4 or 5 boards that I am working on so I
try to keep a good supply on hand. Making a lot of
small orders tend to cost more in shipping charges so it
worth planning ahead.<br>
<br>
On Tuesday, January 20, 2015 at 8:10:57 PM UTC-6,
computerdoc wrote:<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);">Yoda,</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);">The 31 gauge breaks too easily
in my limited experience. I’ve
only tried three PCB corrections so far.
I’ve been hold off modifying the
Gryphon yet until I can get that original
Multicomp prototype’s three
corrections fully functional. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);">I’m wondering
if 24 or 26 gauge would be a better choice and
more stable. I have various colors of 20 and 31
gauge on hand. I bought the 20 for breadboarding
and the 31 for patching PCBs, but since it breaks
so easily, I’m wondering if the
20 gauge is a better choice though it seems a bit
big to solder to a PCB for making corrections.
I’m trying to keep from buying
more wire. It’s a bit expensive
for me the way I’ve been buying
wire.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);">I will check out <a
moz-do-not-send="true"
href="http://phoenixent.com" target="_blank">phoenixent.com</a>
for sockets. The prices look interesting on first
look. I’m working on putting
together an sample order based on your
recommendations. Why do you do $100 orders?
There is only a $3 discount and I have not seen
the $75 minimum, yet. I might have to be a bit
more frugal and order sockets as I need
I’m currently putting together an
order for parts for my Mark IV build. I want to
get it running first, then I’ll
go further with the other two builds
I’m working on. Maybe I missed
something you said concerning ordering in larger
quantities. I’ll reread your
email over to make sure.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);">How do you keep the 30 gauge
wire from catching on something when you make long
runs?</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);">You are probably right on
cost. I was going off of what little I knew about
buying sockets. The prices on Phoenix seem quite
good. I’ll have to do some
comparisons and see. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);">Kip Koon</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);"><a moz-do-not-send="true"
href="javascript:" target="_blank">***@sc.rr.com</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);"><a moz-do-not-send="true"
href="http://www.cocopedia.com/wiki/index.php/Kip_Koon"
target="_blank">http://www.cocopedia.com/wiki/index.php/Kip_Koon</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size: 11pt;
font-family:
"Calibri","sans-serif"; color:
rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span style="font-size: 10pt;
font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";"> <a
moz-do-not-send="true" href="javascript:"
target="_blank">***@googlegroups.com</a>
[mailto:<a moz-do-not-send="true"
href="javascript:" target="_blank">***@googlegroups.com</a>]
<b>On Behalf Of </b>yoda<br>
<b>Sent:</b> Tuesday, January 20, 2015 10:43 AM<br>
<b>To:</b> <a moz-do-not-send="true"
href="javascript:" target="_blank">***@googlegroups.com</a><br>
<b>Subject:</b> Re: [N8VEM: 19225] Re: An MC68030
SBC Design</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Hi Kip<o:p></o:p></p>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I found Paul's BOM to be
pretty accurate to find chips. I am not sure
machined breakaway strips are any cheaper and
can cause problems in alignment. I find <a
moz-do-not-send="true"
href="http://www.phoenixent.com"
target="_blank">http://www.phoenixent.com</a>
a good place to get machined sockets and plcc
sockets. 75 dollar minimum order but order 100
each of 20, 16, 14 pin and you are already
there. I order maybe twice a year and generally
those type of quantities and use them on all my
boards. Just better peace of mind and they look
nice on board - they eliminate frustration
later. I believe if I recall you need 3 44 pin,
1 68 pin and 1 84 pin plcc socket for Gryphon.
The challenge is the 68030 socket. You can
find on ebay searching for mc68030 pga socket.
Not much selection at the moment - they are 20
dollars for 2 from China and will take a while
to get here with Chinese New Year coming up.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I use 30 gauge wire wrap wire
for making patches on boards - works well though
my patches look like rat's nest - I need to get
better at making them look nicer. I would think
31 gauge wire would be OK but I have never heard
of that gauge. I think there are around 20
wires now on the back of my Gryphon board.<br>
<br>
On Tuesday, January 20, 2015 at 1:49:22 AM
UTC-6, computerdoc wrote:<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);">Hi Yoda!</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);">I have been
populating my Gyphon-030 for a while now.
Funds are slow to come. All resistors
except one and all capacitors are now
completely installed. All dip sockets are
installed with machined breakaway strips.
It’s much cheaper. The
next thing to do is order the PLCC
sockets. I’m having to
count the pins to figure out which PLCC
sockets I need. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);">I have begun
building 3 SBCs from N8VEM, the Gryphon,
the Mark IV and the N8. If BOMs had the
PLCCxx socket sizes specified, that would
be a great help for new builders like
myself. I’m new to PLCCs
so I’m still in the
learning stage. I just ordered some
PLCC64 sockets for my Mark IV SBC the
other day as a matter of fact. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);">I could also
really use complete part numbers for the
PLCC chips noted on the BOMs so I can
research costs. You N8VEM seasoned
veterans know what you all are talking
about. Me? Not so much, yet. I have to
do a lot of research on the internet to
figure out what parts the BOMs are
referring too. I’m
pretty good with resistors and capacitors
and I good with 74LS logic only, but the
bigger chips I’m having
to think hard on. You can probably see
the steam coming out of my ears! :P </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);">As an example, I
searched for Z8S180 on ebay the other day
for my Mark IV and found NOTHING. It was
not until I saw Will’s
pictures of his completed Mark IV and read
the Z8S18033VSG part number that I could
find anything in ebay. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);">By the way Will,
I can’t find that email
with pictures of your completed MARK IV
PCB. I thought I saved them, but I guess
not. Would you please send them to me
again? I’m finding that
I’m having to reference
them quite a bit. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);">I thought ebay
could search using a partial word
match?!? I guess not. Anyway, the
Gryphon build is on-going. I have 20
gauge and 31 gauge wire on hand. The 20
gauge seems too big and the 31 gauge is
definitely too small to make corrections
to the Gryphon PCB or any PCB for that
matter. What size wire do I need to make
corrections on PCBs? I ‘ve
tried correcting 3 errors in the very
first release of the Multicomp prototype
James sent me and I never could make it
work. I could desperately use some
tutoring on making corrections on PCBs. I
think that is everything on my mind at the
moment. Keep up the good work. </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);">By the way,
I’d like to help you with
troubleshooting this PCB, but I need a lot
of hand holding to get up to speed. Thank
you for all your hard work and help thus
far. I really appreciate it.</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);">Kip Koon</span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);"><a
moz-do-not-send="true"
href="mailto:***@sc.rr.com">***@sc.rr.com</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);"><a
moz-do-not-send="true"
href="http://www.cocopedia.com/wiki/index.php/Kip_Koon"
target="_blank">http://www.cocopedia.com/wiki/index.php/Kip_Koon</a></span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span style="font-size:
11pt; font-family:
"Calibri","sans-serif";
color: rgb(31, 73, 125);"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt; font-family:
"Tahoma","sans-serif";">
<a moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a>
[<a moz-do-not-send="true"
href="mailto:***@googlegroups.com">mailto:***@googlegroups.com</a>]
<b>On Behalf Of </b>yoda<br>
<b>Sent:</b> Monday, January 19, 2015
10:16 PM<br>
<b>To:</b> <a moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a><br>
<b>Subject:</b> Re: [N8VEM: 19220] Re: An
MC68030 SBC Design</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Hi Andrew!!<o:p></o:p></p>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I have not had much
time to work on it lately but am
planning to get fired up again. SRAM,
UART, ROM, and CPU is working fine. I
suspect the parallel port will work with
no problem. I am going to work on the
IDE port while I mull over the DRAM
config. I think the GAL equations for
the DRAM are not quite right because the
National Semi "Plan Format" is not the
same as "normal" format of other
compilers. I suspect it doesn't honor
the pin assignment logic and the
equations ignore the pin logic
assignments. I need to sit down with
the timing diagrams and verify the
equations. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I am not sure
breaking it up into separate boards will
help a lot. The board is not the
difficult to work on. I just struggle
with Dram as I have not done anything
like that before so it is kind of voodoo
to me. A lot easier to connect logic
analyzer probes to a single board then
spreading amongst multiple boards. What
I really need to do is get the errata
published so that others can look at it
as well. I am not sure what happened
with Paul - have not heard from him in a
while - I think he is probably caught up
in house moving as he sold his house and
had to box everything up. If you have
spare cycles, it would be nice to get
this design into Kicad so we could edit
the schematics directly. I think we
also need to think about what a version
2 board would look like. I know John
Coffman has some ideas and we have been
trading emails. I think we might want
something a little simpler to start with
- and have the ethernet and video
possibly be plugin boards or modules as
the SMT nature of them might not suit
everyone.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I guess what makes it
slow is work - have to be in the right
frame of mind to sit down and do serious
debugging - been drained with work and
the new year - I will get back to it
soon.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Dave<br>
<br>
On Monday, January 19, 2015 at 2:29:34
PM UTC-6, lynchaj wrote:<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);">Hi Dave</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);">Any
progress on the Gryphon project?
What is the latest?</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);">I was
wondering if it would make this
project easier to break out the
core CPU/SRAM/DRAM/Flash/UART
components into a smaller simpler
board? </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);">Get
those working properly and then
integrate in the IO components
later or on a separate board.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);">Thanks</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);">Andrew
Lynch</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";
color: rgb(68, 84, 106);"> </span><o:p></o:p></p>
<div style="border-width: medium
medium medium 1.5pt; border-style:
none none none solid; padding: 0in
0in 0in 4pt; border-color:
-moz-use-text-color
-moz-use-text-color
-moz-use-text-color blue;">
<div>
<div style="border-right: medium
none; border-width: 1pt medium
medium; border-style: solid none
none; padding: 3pt 0in 0in;
border-color:
-moz-use-text-color;">
<p class="MsoNormal"><b><span
style="font-size: 10pt;
font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size: 10pt;
font-family:
"Tahoma","sans-serif";">
<a moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a>
[<a moz-do-not-send="true"
href="mailto:***@googlegroups.com">mailto:***@googlegroups.com</a>]
<b>On Behalf Of </b>yoda<br>
<b>Sent:</b> Monday,
December 29, 2014 4:37 PM<br>
<b>To:</b> <a
moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a><br>
<b>Subject:</b> Re: [N8VEM:
19164] Re: An MC68030 SBC
Design</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">Hi Andrew!!!<o:p></o:p></p>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Well I have
serial and Flash and SRAM
working so far. I have about
7 total errata now counting
the ones Paul identified. I
want to try to fix one of them
different. After I verify
that one I will be putting up
an errata doc as to what
traces need to be cut (3 so
far I think) and patch wires.
The Dram is giving me fits -
I think the logic equations
are in correct as I read the
National Semi Plan example.
If anyone is familiar with
that notation and can check it
that would be appreciated. I
am also working on getting
flow control working on serial
port - should have that
knocked out this week. I am
still debating how to generate
CIIN for I/O - I am running
right now with CDIS* jumpered
so there is no caching at the
moment.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I hope to
have some things posted by New
Years - depends on how much I
watch football and celebrate.
How are you doing?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Dave<br>
<br>
On Monday, December 29, 2014
3:03:52 PM UTC-6, lynchaj
wrote:<o:p></o:p></p>
<div>
<div>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";">Hi
Dave</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";">What’s
the latest on the
Gryphon build and test?
</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";">Please
post photos and updates
on the wiki</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";">Thanks!<br>
<br>
Andrew Lynch</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size: 11pt;
font-family:
"Calibri","sans-serif";"> </span><o:p></o:p></p>
<div style="border-width:
medium medium medium
1.5pt; border-style: none
none none solid; padding:
0in 0in 0in 4pt;
border-color:
-moz-use-text-color
-moz-use-text-color
-moz-use-text-color blue;">
<div>
<div
style="border-right:
medium none;
border-width: 1pt
medium medium;
border-style: solid
none none; padding:
3pt 0in 0in;
border-color: rgb(181,
196, 223)
-moz-use-text-color
-moz-use-text-color;">
<p class="MsoNormal"><b><span
style="font-size:
10pt;
font-family:
"Tahoma","sans-serif";">From:</span></b><span
style="font-size:
10pt; font-family:
"Tahoma","sans-serif";"> <a moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a> [<a
moz-do-not-send="true"
href="mailto:***@googlegroups.com">mailto:***@googlegroups.com</a>]
<b>On Behalf Of </b>yoda<br>
<b>Sent:</b>
Monday, December
15, 2014 12:36 PM<br>
<b>To:</b> <a
moz-do-not-send="true"
href="mailto:***@googlegroups.com">***@googlegroups.com</a><br>
<b>Subject:</b>
[N8VEM: 19098] Re:
An MC68030 SBC
Design</span><o:p></o:p></p>
</div>
</div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<p class="MsoNormal">The
Gryphon roars!!!<o:p></o:p></p>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">I
have now
successfully gotten
the board to send
and receive
characters on the
mc68681 chip and the
SRAM passes basic
memory testing so
now I can have a
stack and variables
and can start using
C for programming.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">There
are a few patches
that are necessary
for things to work.
I will be posting
them to the wiki in
the next few days.
I want to redo one
of them differently
as the way I did it
works but may cause
problems later when
I turn on caching.
I have CDIS*
jumper'd at the
moment, because John
Coffman reminded me
that all I/O must be
cache inhibited.
Right now CIN* is
pulled HI - I think
I can remedy that
with another patch
(enough logic still
left in the GALs) so
I need to look at
that one. I quickly
tried the DRAM last
night but it failed
so I will have to
pull out Mr
LogicAnalyzer and
see what is going
on. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Just
thought I would give
a quick update - the
problem I had with
the MC68681 turned
out to be that the
68030 can write
commands to it too
fast and I had to
put some NOPs in the
initialization
section only. I
found that hidden in
one of the data
sheets - not
mentioned in any of
the Motorola
datasheets but was
in a Signetics data
sheet.<o:p></o:p></p>
</div>
</div>
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