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Re: [N8VEM-S100:3824] Re: An 80386 master/Slave CPU board with 8 or 32 MB Static RAM boards
OK, sounds good. They're panelized so there are 25 per panel so they
add up quickly. :-)
* monahanz <mon...@vitasoft.org> [140529 14:10]:
> That would be great Todd. So far it looks like there will be about 7-10 of
> the 32MB boards needed, so that would be 40 mezzanine boards just for that
> 32MB board alone!
> John
>
>
> On Thursday, May 29, 2014 8:34:34 AM UTC-7, monahanz wrote:
>
> > Yes I’ll be ordering all 3 boards (3 of each). I forgot about the
> > mezzanine RAM boards. I actually don’t need any, they are the sane mini-
> > boards that Todd ordered for the 16M static RAM board.
> >
> > I guess I should get some more however
> >
> > John
> >
> >
> >
> > *From:* n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com] *On
> > Behalf Of *Paul Birkel
> > *Sent:* Thursday, May 29, 2014 3:28 AM
> > *To:* n8vem...@googlegroups.com
> > *Subject:* Re: [N8VEM-S100:3814] Re: An 80386 master/Slave CPU baord with
> > 8 or 32 MB Static RAM boards
> >
> >
> >
> > John: When you say "I will be ordering a few "commercial quality" boards
> > for myself." I'm unsure whether you are referring to only the 80386 board,
> > or including orders for the 8MB and 32MB boards? David obviosuly thinks
> > that you meant the latter :->.
> >
> > I'd also be interested in some mix of the three, but I'm unclear exactly
> > what your proposal includes/entails?
> >
> >
> >
> > So I'll toss in a request just like David:
> >
> >
> >
> > 1 x 80386 CPU board and one each of the memory boards 8Mb & 32Mb (with a
> > set of 4 mezzanines)
> >
> >
> >
> > Yes, either way the cost to populate the memory ICs is expen$ive; the joys
> > of static memory. I think that you meant to say that the Alliance Memory
> > (DIP) works out to about $16 for 4 chips = 2MB -- about the same as one SMD
> > chip of the same aggregate capacity. TANSTAAFL!
> >
> >
> >
> > On Thu, May 29, 2014 at 3:15 AM, David Fry <dgf...@googlemail.com> wrote:
> >
> > Hi John,
> >
> >
> >
> > I would like 1 x 80386 CPU board and one each of the memory boards 8Mb &
> > 32Mb (with a set of 4 mezzanines) as i am undecided at this point which
> > memory board to do. The AS6C4008 DIP chip is the cheaper chip at about
> > £3.00 UK a piece at Farnell.
> >
> >
> >
> > best regards
> >
> >
> >
> > David Fry
> >
> >
> >
> >
> > On Thursday, May 29, 2014 5:58:57 AM UTC+1, monahanz wrote:
> >
> > Well it looks like it's finally done. After some 6 prototype boards and
> > one year later it looks like we now have a completely functional S100 bus
> > 80386 board. This board runs on a 21 slot motherboard at 9MHz for all
> > interrupts, I/O ports and RAM from 0 to 16MB. For the remaining RAM (up to
> > 4GB for the 80386) the CPU runs at 36MHz (in pipeline protected mode) and
> > 32 bits wide via two above board cable connectors.
> >
> >
> >
> > A complete description of the board can be found here:-
> >
> >
> > http://s100computers.com/My%20System%20Pages/80386%20Board/80386%20CPU%20Board.htm
> >
> >
> >
> > There is also a short video of the board in operation towards the bottom
> > of the page.
> >
> >
> >
> > A major component of this effort was writing the 80386 monitor. It's in
> > fact surprising how little example code there is out the demonstrating the
> > setting up the 80386 to switch from real to protected mode. This is
> > written up here:-
> >
> >
> > http://s100computers.com/Software%20Folder/80386%20Monitor/80386%20Monitor.htm
> >
> >
> >
> > The board currently works with two static RAM boards that sit in the bus
> > but communicate directly (and only) with the 80386. The capacity of these
> > boards are 8 and 32 MB's. These are described here:-
> >
> >
> >
> >
> > http://s100computers.com/My%20System%20Pages/80386%20-%208MG%20RAM%20Board/8MG%20Static%20RAM%20Board.htm
> >
> >
> > http://s100computers.com/My%20System%20Pages/80386%20-%2032MG%20RAM%20Board/32MG%20Static%20RAM%20Board.htm
> >
> >
> >
> > A big thanks goes out to Andrew Lynch at N8VEM (
> > http://n8vem-sbc.pbworks.com/w/page/4200908/FrontPage) for laying out the
> > many prototypes these boards took. Thanks Andrew.
> >
> >
> >
> > I will be ordering a few "commercial quality" boards for myself. If
> > anybody else would like one of these boards they can let me know. *However
> > be aware that these boards are not only complex but expensive to build*.
> > The boards themselves are the smallest part of the whole equation. The 8MB
> > static RAM board is a rock solid board and great for testing out the
> > hardware and software but those Alliance Memory Inc. 512x8 static RAM
> > chips cost about $20 each. The 32MB board on the other hand has 4 times
> > the capacity for about the same price but uses SMD chips.
> >
> >
> >
> > Next up is an 80486 board and the real challenge a 4GB DRAM board!
> >
> >
> >
> > Enjoy
> >
> > John Monahan
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> >
> > .
> >
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