home brew S-100 backplane project
lynchaj
but on the chance you are here...
I've designed a home brew S-100 backplane project. I have several PCBs
available for testing and am looking for experienced S-100 hobbyists
for the initial evaluation. The PCBs are $32 each with $2 shipping in
the US if you are interested in participating. Please contact me
offline if interested.
http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder¶m=S100
Please note this is a purely amateur volunteer home brew project and
totally noncommercial. Thanks and have a nice day!
Andrew Lynch
Dirk Bruere at NeoPax
I can believe the non-commercial bit!
And for totally non-commercial get an S100 system to run Vista:-)
--
Dirk
http://www.transcendence.me.uk/ - Transcendence UK
http://www.theconsensus.org/ - A UK political party
http://www.onetribe.me.uk/wordpress/?cat=5 - Our podcasts on weird stuff
BobW
"Dirk Bruere at NeoPax" <dirk....@gmail.com> wrote in message
news:76eoa1F...@mid.individual.net...
> lynchaj wrote:
>> Hi! I don't know if there are any S-100 enthusiasts who are on SED
>> but on the chance you are here...
>>
>> I've designed a home brew S-100 backplane project. I have several PCBs
>> available for testing and am looking for experienced S-100 hobbyists
>> for the initial evaluation. The PCBs are $32 each with $2 shipping in
>> the US if you are interested in participating. Please contact me
>> offline if interested.
>>
>> http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder�m=S100
>>
>> Please note this is a purely amateur volunteer home brew project and
>> totally noncommercial. Thanks and have a nice day!
>>
>> Andrew Lynch
>
> I can believe the non-commercial bit!
> And for totally non-commercial get an S100 system to run Vista:-)
>
> --
> Dirk
>
Check out those file sizes (like a 32KB basic compiler). The pdf file for
MBASIC is larger than the whole freakin' CPM operating system!
I think I can even remember how to use PIP (the Peripheral Interchange
Program).
2400.mac 1KB
38400.mac 1KB
L80.COM 11KB
SUPERSUB.COM 2KB
BASLIB.REL 24 KB
WS.OVR 52KB
WSMSGS.OVR 14KB
WSPRINT.OVR 147KB
FORMATA.COM 320bytes
ASM.COM 8KB
BASCOM.COM 32KB
BRUN.COM1 5KB
DDT.COM 5KB
DDTZ.COM 10KB
DIRX.COM 3KB
DUMP.COM 384bytes
ED.COM 7KB
FORMATB.COM 320bytes
KEYBOARD.COM 3KB
LCD20X4.COM 3KB
LIB80.COM 5KB
LOAD.COM 2KB
LU.COM 20KB
M80.COM 20KB
SURVEY.COM 1KB
PIP.COM 7KB
pmautoae.com 30KB
R.COM 4KB
SIMPLE.COM 3bytes
SPEED.COM 1KB
STAT.COM 5KB
XM50LB1.COM 3KB
UNLOAD.COM 1KB
VDE263.COM 13KB
ZDE.COM 17KB
XM.COM 3KB
XMODEM38.COM 2KB
XSUB.COM 768bytes
XZI.COM 7KB
BCLOAD 128bytes
mbasic.pdf 2.39MB
MBASIC.COM 24KB
VEDIT.COM 33KB
VINST263.COM 10KB
W.COM 4KB
WS.COM 7KB
WSU.COM 17KB
XIZ.COM 6KB
Bob
--
== All google group posts are automatically deleted due to spam ==
Eeyore
BobW wrote:
> "Dirk Bruere at NeoPax" <dirk....@gmail.com> wrote in message
> > lynchaj wrote:
> >> Hi! I don't know if there are any S-100 enthusiasts who are on SED
> >> but on the chance you are here...
> >>
> >> I've designed a home brew S-100 backplane project. I have several PCBs
> >> available for testing and am looking for experienced S-100 hobbyists
> >> for the initial evaluation. The PCBs are $32 each with $2 shipping in
> >> the US if you are interested in participating. Please contact me
> >> offline if interested.
> >>
> >> http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder�m=S100
> >>
> >> Please note this is a purely amateur volunteer home brew project and
> >> totally noncommercial. Thanks and have a nice day!
> >>
> >> Andrew Lynch
> >
> > I can believe the non-commercial bit!
> > And for totally non-commercial get an S100 system to run Vista:-)
>
> Check out those file sizes (like a 32KB basic compiler). The pdf file for
> MBASIC is larger than the whole freakin' CPM operating system!
>
> I think I can even remember how to use PIP (the Peripheral Interchange
> Program).
PIP source destination.
Graham
Eeyore
lynchaj wrote:
> Hi! I don't know if there are any S-100 enthusiasts who are on SED
> but on the chance you are here...
Are you serious ? S-100 went out with the ark.
The S-100 bus, IEEE696-1983 (withdrawn), was an early computer bus
designed in 1974
http://en.wikipedia.org/wiki/S-100_bus
Graham
Baron
> lynchaj wrote:
>> Hi! I don't know if there are any S-100 enthusiasts who are on SED
>> but on the chance you are here...
>>
>> I've designed a home brew S-100 backplane project. I have several
>> PCBs available for testing and am looking for experienced S-100
>> hobbyists
>> for the initial evaluation. The PCBs are $32 each with $2 shipping
>> in
>> the US if you are interested in participating. Please contact me
>> offline if interested.
>>
>> http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder¶m=S100
>>
>> Please note this is a purely amateur volunteer home brew project and
>> totally noncommercial. Thanks and have a nice day!
>>
>> Andrew Lynch
>
> I can believe the non-commercial bit!
> And for totally non-commercial get an S100 system to run Vista:-)
>
Its one way of getting people to visit his website !
--
Best Regards:
Baron.
Rich Grise
>
> I think I can even remember how to use PIP (the Peripheral Interchange
> Program).
>
I once had a devil of a time teaching that to an accountant! ;-)
Cheers!
Rich
Rich Grise
> BobW wrote:
>>
>> I think I can even remember how to use PIP (the Peripheral Interchange
>> Program).
>
> PIP source destination.
>
synonymus with "copy"; it's the opposite, kinda.
I know his; I was there. I remember being rankled by Intel's convention
of putting their operands backwards, but my earliest computer experience
was in 1966, so what did I know? ;-)
Then again, why was it so hard to write an assembler with _human_ readable
mnemonics? You can put the bits in the byte anywhere you want to!
Hope This Helps!
Rich
castleb...@att.net
"lynchaj" <lyn...@yahoo.com> wrote in message
news:b0587020-c510-472e...@r13g2000vbr.googlegroups.com...
On May 7, 3:59 am, Eeyore <rabbitsfriendsandrelati...@hotmail.com>
wrote:
Yes, I am serious. Snarky comments aside, I am interested in both
vintage computing (S-100, CP/M, etc) and home brew computing (design
from scratch). Both are niche hobbies but have quite a bit in
common. Much of what we now associate with microcomputers originated
in the "Homebrew Computer Club" back in the mid 1970s and this project
is a bit of an homage to that exciting period in technological
history.
http://en.wikipedia.org/wiki/Homebrew_Computer_Club
I take it from the responses so far there isn't much interest and
that's OK. On the off chance there is anyone interested, here is an
updated URL for the N8VEM S-100 backplane project.
http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder¶m=S100
Tonight more parts arrived and I was able to almost finish
construction of the backplane itself and the power supply subsystem.
My goal is to make this unit as affordable and as authentic as
possible without making an expensive replica system. I am keeping the
design small while in development. I haven't settled on a number of
design points although I am fairly sure about the backplane itself.
There are going to be some compromises to keep if affordable.
The good news is the active terminator circuit appears to be working.
Also the power supply subsystem is feeding the proper voltages into
the backplane. I powered everything up this evening and nothing
caught on fire which is always nice. After some measurements things
appear to be in order with just a minor adjustment to the trimmer pot
setting the voltage on the bus signals lines to 2.7v.
Next is to mount everything on a board, install a connector and begin
the shake out with some real S-100 boards. Eventually build up a
small system to evaluate the performance, noise, etc of the bus
itself.
Thanks and have a nice day!
Andrew Lynch
I myself like doing homebrew microsequencer projects.
Bob
don
Jon Kirwan
wrote:
><snip>
>The good news is the active terminator circuit appears to be working.
><snip>
Ah! That was the question I was going to ask. And you answered it.
Good! It's _active_ termination!
Jon
Rich Grise
> On May 7, 3:59�am, Eeyore <rabbitsfriendsandrelati...@hotmail.com>
> vintage computing (S-100, CP/M, etc) and home brew computing (design
> from scratch). Both are niche hobbies but have quite a bit in
> common. Much of what we now associate with microcomputers originated
> in the "Homebrew Computer Club" back in the mid 1970s and this project
> is a bit of an homage to that exciting period in technological
> history.
Are you talking about using off-the-shelf whole micros (Z80,...), or
building your own bit-slice machine? ;-)
I guess these days you'd do that with a CPLD or an FPGA, and a core. ;-)
Have Fun!
Rich
castleb...@att.net
"Rich Grise" <rich...@example.net> wrote in message
news:pan.2009.05.08...@example.net...
There used to be a kit for doing a bit slice Z80 on S100 board.
Bob
I have an 8080 and an 8008 S100 system laying around.
Bob
Jon Kirwan
wrote:
>On May 7, 3:59�am, Eeyore <rabbitsfriendsandrelati...@hotmail.com>
>wrote:
>Yes, I am serious. Snarky comments aside, I am interested in both
>vintage computing (S-100, CP/M, etc) and home brew computing (design
>from scratch). Both are niche hobbies but have quite a bit in
>common. Much of what we now associate with microcomputers originated
>in the "Homebrew Computer Club" back in the mid 1970s and this project
>is a bit of an homage to that exciting period in technological
>history.
>
>http://en.wikipedia.org/wiki/Homebrew_Computer_Club
>
>I take it from the responses so far there isn't much interest and
>that's OK. On the off chance there is anyone interested, here is an
>updated URL for the N8VEM S-100 backplane project.
>
>http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder¶m=S100
><snip>
I got a chance to start skimming through the pages, just now. Some
initial comments.
(1) I really enjoyed the breadth of example pictures included. That
really helps a lot.
(2) I normally disallow pretty much all permissions on new web pages.
What first showed up was a nearly blank page, as a result, without an
indication that permissions should be enabled. (I knew it, of course,
but it always helps to set things up so that if the web page may look
confusing that a helpful message appears to suggest a direction.)
(3) Once enabled, the preview of JPGs that appear when the mouse is
placed over a link is much appreciated! That is something that I now
know I wish happened more often on other pages. Keep that up!
Other than that, I'm still reading along and thanks.
Jon
don
http://pdf1.alldatasheet.com/datasheet-pdf/view/140822/AMD/AM2901BDC.html
Is this useful ?
don
Dangerous Bill
> Hi! I don't know if there are any S-100 enthusiasts who are on SED
> but on the chance you are here...
Very retro. And nostalgic, too. I understand there are still Commodore
64 groups around, too.
Within the last twelve months, I actually threw out an eight socket
S-100 backplane, an S-100 specifications manual, and a handful of
breadboard PCBs. Gone forever.
I cut my teeth on S-100 about 1978, helping a technician in my group
assemble memory and !/O boards when I needed a break from the
paperwork. They used more power than an arc welder, but they worked.
Dangerous Bill
Dangerous Bill
> http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder¶m=S100
Notice:
My Norton tells me that site is infected with
W97M.Thus.A
Dangerous Bill
Tim Williams
> I cut my teeth on S-100 about 1978, helping a technician in my group
Core?
Tim
lynchaj
>
> - Show quoted text -
Hi Rich! Thanks! Right now I am just focusing on making a good S-100
backplane. My next S-100 related project will probably be a PCB for a
linear power supply. IMO the biggest obstacles preventing more S-100
home brew hobbyist development is the lack of readily available
backplanes and power supplies.
As you know, S-100 has some rather unusual power requirements and its
difficult to come up with replacements. You can make you own linear
power supplies but they are usually huge and difficult to work with
things. I'd like to simplify it a bit.
Making S-100 cards has been done already so I'd like to work more on
the infrastructure before making new boards. The first board I'd make
though would be a new source of S-100 prototype boards. You can still
get them but they are hard to find and cost and too much IMO.
lynchaj
> On Thu, 7 May 2009 18:34:08 -0700 (PDT), lynchaj <lync...@yahoo.com>
> wrote:
>
>
>
>
>
> >On May 7, 3:59 am, Eeyore <rabbitsfriendsandrelati...@hotmail.com>
> >wrote:
> >> lynchaj wrote:
> >> > Hi! I don't know if there are any S-100 enthusiasts who are on SED
> >> > but on the chance you are here...
>
> >> Are you serious ? S-100 went out with the ark.
>
> >> The S-100 bus, IEEE696-1983 (withdrawn), was an early computer bus
> >> designed in 1974http://en.wikipedia.org/wiki/S-100_bus
>
> >> Graham
>
>
> >http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder¶m=S100
> ><snip>
>
> I got a chance to start skimming through the pages, just now. Some
> initial comments.
>
> (1) I really enjoyed the breadth of example pictures included. That
> really helps a lot.
>
Hi Jon! Thanks!
Yes, I've added some pictures and many of the N8VEM home brew
computing builders have added theirs as well. You can see all the
N8VEM home brew computing project information at the wiki and the
mailing list
http://groups.google.com/group/n8vem
Any and all interested in home brew computing are welcome to join and
discuss. PCBs are available for all the projects; the N8VEM SBC, ECB
backplane, ECB bus monitor, ECB prototyping board, Disk IO, and Zilog
Peripherals boards. Some of the N8VEM builders have their own project
PCBs available too like James (miniN8VEM and derivatives), Vince
(PockeTerm, etc) and a lot of other stuff. Its too much to describe
so you're better off just seeing for yourself.
My original post was regarding the S-100 backplane I am developing and
looking for experienced S-100 persons interested in joining that
aspect of the N8VEM project. I'd like to branch into S-100 related
stuff and am exploring the options at the moment. The other N8VEM
projects tend to be ECB Eurocard style neo vintage computing items.
However, there are some PICAxe, Propeller, and various other things
underway at any given time too.
> (2) I normally disallow pretty much all permissions on new web pages.
> What first showed up was a nearly blank page, as a result, without an
> indication that permissions should be enabled. (I knew it, of course,
> but it always helps to set things up so that if the web page may look
> confusing that a helpful message appears to suggest a direction.)
>
Yes, pbworks is rather complicated for my tastes but it works and is
free so its OK. I'd prefer something a bit simpler myself. Like an
FTP directory.
> (3) Once enabled, the preview of JPGs that appear when the mouse is
> placed over a link is much appreciated! That is something that I now
> know I wish happened more often on other pages. Keep that up!
>
> Other than that, I'm still reading along and thanks.
>
Well if you or anyone else are interested you are welcome to join.
You don't have to purchase PCBs although it will be fun to put them
together and discuss your favorite topics with the other builders.
Its not a blog or business but just a bunch of friends who like home
brew computers.
> Jon- Hide quoted text -
>
> - Show quoted text -
Some people debate whether something you build from a purchased PCB is
really a home brew computer and I can see their point. However, all
the N8VEM PCBs I have *did* start out as a home brew projects.
Typically they start life as a blank piece of paper and a DATAK
prototype board although lately I've been using these N8VEM prototype
boards.
The N8VEM ECB prototype boards make it so easy I feel like its
cheating. That is especially ironic since I originally did not
support the idea of a prototype board but so many builders asked for
them I felt I had to. Now I am the biggest consumer of them - oops.
All the builders get is the PCBs and they do the rest on their own. I
supply schematics and PCB layouts. Occasionally a preprogrammed EPROM
or hard to get part but for the most part its "sink or swim" for the
builders. An amazing percentage of them get them working too. Its
close to 100% or at least I don't know of anyone that *hasn't* gotten
them to work. I suppose there are some who never finish their
projects but I don't know of any. The builders share a lot of
information from their builds so new builders do get quite a leg up
now. The first batch was pretty sporty though.
lynchaj
Hi Bill! If you find any more stuff like that please contact me.
Especially wire wrap supplies or parts. I use them all the time and
it breaks my heart to see them tossed in the garbage. I will use them
or find someone who will appreciate them.
Allan Herriman
I remember making a bit slice machine out of those (or was it 2903?) back
in the day. A few MHz seemed fast at the time.
They're not really useful now, considering what you can do with FPGAs.
Regards,
Allan
Dangerous Bill
> Bill, I think you need to get your virus definitions updated.
> "W97M.Thus.A" is a ten year old virus
> http://www.symantec.com/security_response/writeup.jsp?docid=2000-1219...
Yep. But ten years old doesn't mean they're not still around.
Presumably the only way my (newly updated) Norton 2009 would know
about a virus would be if it were in the first files loaded. Be
cautious, or perhaps scan for the thing in your own system.
DB
Dangerous Bill
Z-80. It was being used for acoustic analysis in marine projects.
DB
castleb...@att.net
"Allan Herriman" <allanh...@hotmail.com> wrote in message
news:0214eb6e$0$19301$c3e...@news.astraweb.com...
I was not thinking of processor emulation or design but specialized
applicatons.
Bob
Tim Williams
> On May 8, 3:07 pm, Tim Williams <tmoran...@gmail.com> wrote:
>
> > On May 8, 3:50 pm, Dangerous Bill <wrp0...@comcast.net> wrote:
>
> > > I cut my teeth on S-100 about 1978, helping a technician in my group
> > > assemble memory and I/O boards
> > Core?
>
> Z-80. It was being used for acoustic analysis in marine projects.
No, I meant, was it core memory? ;-)
Tim
Nobody
> My Norton tells me that site is infected with
> W97M.Thus.A
What's a MS-Word macro virus doing on a web page?
lynchaj
> Hi! I don't know if there are anyS-100enthusiasts who are on SED
> but on the chance you are here...
>
> available for testing and am looking for experiencedS-100hobbyists
> for the initial evaluation. The PCBs are $32 each with $2 shipping in
> the US if you are interested in participating. Please contact me
> offline if interested.
>
> http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder¶m=S100
>
> Please note this is a purely amateur volunteer home brew project and
>
> Andrew Lynch
Hi! I updated the N8VEM S-100 wiki folder with the latest schematics
and PCB layout. I made some minor clean up changes but nothing of
consequence. Also added an S-100 board "blank template" for designing
S-100 board using KiCAD.
I made a quick and dirty S-100 prototyping board if anyone is
interested they can review that. All comments, questions, and/or
suggestions welcome. If there is enough interest in the S-100
prototyping board I may do a PCB manufacturing run. Please let me
know offline. I am guessing the PCBs would be about $25 each or so
due to small numbers.
Rich Grise
>>
>
> http://pdf1.alldatasheet.com/datasheet-pdf/view/140822/AMD/AM2901BDC.html
>
the main board of a PDP-8, and noticed that it was a bit-slice. I've
worked with the National IMP-16, which was a bit-slice, and once at
Control Data Magnetic Peripherals Division, they had a processor that
they called "The Enhanced Normandale Controller-Tester", since as a
peripherals division, MPI didn't officially make processors. It was a
bit-slice with TTL RAM; at the time I had an 8008 running at about 1
MHz; the ENCT had a 168 nsec instruction cycle, and was 16 bits wide
(4X 74181).
They were fun, but I never got into them to the depth I wanted to.
Cheers!
Rich
Rich Grise
> On Fri, 08 May 2009 14:42:33 -0600, don wrote:
>
>> I just found a bag of AM2901 FOUR-BIT BIPOLAR MICROPROCESSOR SLICE.
>>
>> http://pdf1.alldatasheet.com/datasheet-pdf/view/140822/AMD/
> AM2901BDC.html
>
> in the day. A few MHz seemed fast at the time.
>
> They're not really useful now, considering what you can do with FPGAs.
>
Cheers!
Rich
JosephKK
If you want to build a bit-slice Z80, 8086, 68000, NS32000, 16, 32, or
64 bit mips, SPARC, or most any processor via bit slice for the fun of
it sure. Hey we could really have some fun with 74AHCT equivalents of
that series. Far faster and lower power.
JosephKK
wrote:
>On May 8, 1:55 pm, Rich Grise <richgr...@example.net> wrote:
I used to have an S-100 PS. It weighed 40+ pounds and was 6 by 10 by
5 inches. Use a switcher please.
JosephKK
wrote:
>On May 8, 4:50 pm, Dangerous Bill <wrp0...@comcast.net> wrote:
I still have some wirewrap kit. Ain't ready to let go yet. Actually
used it a few years ago.
DJ Delorie
"JosephKK"<quiett...@yahoo.com> writes:
> I still have some wirewrap kit. Ain't ready to let go yet. Actually
> used it a few years ago.
I still have my wirewrap tools and wire, and use them on nearly every
project. Wire wrap wire makes good vias and ECO wire :-)
Rich Grise
I used wirewrap wire almost exclusively for prototyping, and solder-tag
sockets. I filed the rivet off a WSU-30M cutter blade, and clamped the
blade into an X-acto handle; I could make pre-stripped daisy chain wires.
;-)
Cheers!
Rich
Bob Larter
> Hi! I don't know if there are any S-100 enthusiasts who are on SED
> but on the chance you are here...
>
> available for testing and am looking for experienced S-100 hobbyists
> for the initial evaluation. The PCBs are $32 each with $2 shipping in
> the US if you are interested in participating. Please contact me
> offline if interested.
>
> http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder�m=S100
>
> Please note this is a purely amateur volunteer home brew project and
What, a real, 70's style S-100 system? Why?
--
W
. | ,. w , "Some people are alive only because
\|/ \|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
Bob Larter
> "Dirk Bruere at NeoPax" <dirk....@gmail.com> wrote in message
> news:76eoa1F...@mid.individual.net...
>> lynchaj wrote:
>>> Hi! I don't know if there are any S-100 enthusiasts who are on SED
>>> but on the chance you are here...
>>>
>>> I've designed a home brew S-100 backplane project. I have several PCBs
>>> available for testing and am looking for experienced S-100 hobbyists
>>> for the initial evaluation. The PCBs are $32 each with $2 shipping in
>>> the US if you are interested in participating. Please contact me
>>> offline if interested.
>>>
>>> http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder�m=S100
>>>
>>> Please note this is a purely amateur volunteer home brew project and
>>> totally noncommercial. Thanks and have a nice day!
>>>
>> I can believe the non-commercial bit!
>> And for totally non-commercial get an S100 system to run Vista:-)
>>
>> --
>> Dirk
>>
>
> Check out those file sizes (like a 32KB basic compiler). The pdf file for
> MBASIC is larger than the whole freakin' CPM operating system!
>
> I think I can even remember how to use PIP (the Peripheral Interchange
> Program).
How about DEBUG?
I'm sure I could still operate WordStar. ;^)
Bob Larter
[...]
> Next is to mount everything on a board, install a connector and begin
> the shake out with some real S-100 boards. Eventually build up a
> small system to evaluate the performance, noise, etc of the bus
> itself.
What are you using for CPUs? Real 8080s or Z80s?
Bob Larter
> As you know, S-100 has some rather unusual power requirements and its
> difficult to come up with replacements.
Not that unusual. The biggest hassle these days would be the 8V rail.
> You can make you own linear
> power supplies but they are usually huge and difficult to work with
> things. I'd like to simplify it a bit.
You might be able to find a PC PSU where you can jack up the 5V rail to 8V.
Bob Larter
> My original post was regarding the S-100 backplane I am developing and
> looking for experienced S-100 persons interested in joining that
> aspect of the N8VEM project.
I used to be fairly expert with S-100 & STD-BUS designs, but boy, that
was a *long* time ago! Dunno how much I remember of it these days.
Bob Larter
Nah. 4116s, most likely.
lynchaj
> Hi! I don't know if there are any S-100 enthusiasts who are on SED
> but on the chance you are here...
>
> I've designed a home brew S-100 backplane project. I have several PCBs
> available for testing and am looking for experienced S-100 hobbyists
> for the initial evaluation. The PCBs are $32 each with $2 shipping in
> the US if you are interested in participating. Please contact me
> offline if interested.
>
> http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder¶m=S100
>
> Please note this is a purely amateur volunteer home brew project and
> totally noncommercial. Thanks and have a nice day!
>
> Andrew Lynch
Hi! Just a quick update on the N8VEM home brew computing project
specifically the S-100 PCBs. The N8VEM S-100 backplane PCBs are all
sent to the testers and the results so far have been positive. There
were some "clean up" issues with the documentation but no "show
stoppers" identified. If anyone would like to get their own N8VEM
S-100 backplane PCB please contact me and I will place you on the
waiting list for the next batch.
Based on the feedback I've gotten so far there does not appear to be a
need for an N8VEM S-100 linear power supply PCB. Builders can use
commercial SMPSUs or repurposed SMPSUs which is what I do. If you are
interested in an N8VEM S-100 linear power supply PCB please contact me
off list to discuss. I'll offer one if there is sufficient interest
to warrant a manufacturing run of prototype LPSU PCBs. Of course you
could make your own S-100 LPSU or use a legacy LPSU.
Today Fedex attempted to deliver my first batch of the N8VEM S-100
prototyping boards. They will be available tomorrow for $25 each plus
shipping which is typically $2 in the US and $5 overseas. With the
S-100 backplane, an SMPSU, and an S-100 prototyping board you have
enough to make your own S-100 home brew computer. There is additional
information on the N8VEM S-100 prototyping board at the N8VEM wiki in
the S100 folder.
I am considering making some additional S-100 boards such as an 8080A
CPU board, SRAM board, and serial IO board but have no firm plans at
the moment. If you are interested in cooperating with me on an S-100
home brew project please contact me off list. Most likely most people
in SED will not be interested in S-100 home brew computing so this
should probably be continued on comp.os.cpm or at the N8VEM mailing
list.
Thanks and have a nice day!
Andrew Lynch
PS, please join us on the N8VEM mailing list and wiki. There are
several N8VEM home brew computing PCBs available.
lynchaj
> On May 6, 8:10 pm, lynchaj <lync...@yahoo.com> wrote:
>
[snip]
>
> Thanks and have a nice day!
>
> Andrew Lynch
>
> PS, please join us on the N8VEM mailing list and wiki. There are
> several N8VEM home brew computing PCBs available.
>
> http://n8vem-sbc.pbworks.com/
>
> http://groups.google.com/group/n8vem
The N8VEM S-100 prototyping board PCBs arrived today. I built one and
it works great. Fits just fine and all the voltages are correct and
in the right places. The PCBs turned out very nice. Please contact
me off list if interested in getting one or more. I posted some
photos on the N8VEM wiki in the S100 folder.
http://n8vem-sbc.pbworks.com/browse/#view=ViewFolder¶m=S100
Ben Bradley
<rabbitsfriend...@hotmail.com> wrote:
>
>
>lynchaj wrote:
>
>> Hi! I don't know if there are any S-100 enthusiasts who are on SED
>> but on the chance you are here...
>
>Are you serious ? S-100 went out with the ark.
>
>The S-100 bus, IEEE696-1983 (withdrawn), was an early computer bus
>designed in 1974
>http://en.wikipedia.org/wiki/S-100_bus
Hey, I've got a KIM-1, a KIMSI, and an 8K S100 memory board all in
a box somewhere. I'll pull 'em out someday.
But right now I'm interested in getting this SX-42 going. It'll be
nice when it runs right, but I really want an NC-300, and shudda
bought the one I saw at the hamfest last Saturday.
>
>Graham