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Re: [N8VEM-S100:4100] ALTAIR/IMSAI 8080 CPU replacement board & FP-Mini Front panel

Hi Don,

I have SMB boards available.  $20.  You'll need a display mezzanine for
it.  There are three different ones depending upon your displays (TIL311
- $6, LED Bar - $10, and HP5082 - $10)

Shipping is $5.95 in the US.

Thanks,

Todd

* Don Caprio <cap...@uxpro.com> [140610 14:42]:
> I don't have a SMB board. Any available? If so I can look at options for
> both.
> 
> 
> 
> On Sat, Jun 7, 2014 at 12:25 PM, Tom Lafleur <laf...@lafleur.us> wrote:
> 
> > When you make the panel for the front, look at an option for us who may
> > want to install an SMB front panel board
> >
> > Thanks
> >
> >
> > ~~ _/) ~~~~ _/) ~~~~ _/) ~~~~ _/) ~~
> > Sent from my Phone
> >
> >
> > On Jun 7, 2014, at 3:07 PM, Fabio Battaglia <hkzl...@gmail.com> wrote:
> >
> > This is great!
> > I'll definitely be interested in the chassis, multiple fpmini boards and
> > if someone does a group buy of paddles, those too.
> >
> > Fabio
> > On Jun 7, 2014 6:53 AM, "Don Caprio" <ilv...@gmail.com> wrote:
> >
> >>  Josh, Rich, and S-100 gang,
> >>
> >> The Imsai front panel S-100 (aka fp-mini) was stalled for quite some
> >> time. Family, work and
> >> remodel project left no spare time.
> >>
> >> Looks like we have new life on the project. Many, many thanks to Josh who
> >> got one of prototype
> >> boards and worked out the final bugs. Looks like The next prototype
> >> should be our last before
> >> production run.
> >>
> >> This board is a bit pricey due to the cost of the mini paddle switches. A
> >> completed set of paddle
> >> switches goes for ~ $125.00. My source for the toggles left the company
> >> so I'm finding a new
> >> contact and pricing.
> >>
> >> The FP-Mini and Josh's new 8080 board is going to make a fantastic, two
> >> board complete system.
> >>
> >> I'm working with a local sheet metal fabricator on a mini-chassis based
> >> around the fp-mini and the
> >> S-100 8 slot mother board. I needed a chassis design for the next board
> >> layout. We'll need to move
> >> switches around and provide mounting holes on the PCB. Anyone who has
> >> ideas or experience
> >> creating a photo mask for the Plexiglas section drop me a line. It may be
> >> as simple as printing a
> >> transparency on a laser printer.
> >>
> >> Once I get a final price on the chassis I'll send out a notice to see
> >> who's
> >> interested. The more we order the cheaper they are. I've mocked up a
> >> prototype of the chassis
> >> for your review and comments.
> >>
> >> Thanks.
> >>
> >> <mini-fp-chassis-small.jpg>
> >>
> >> <mini-fp-chassis-top-small.jpg>
> >>
> >>
> >>
> >> On 06/ 6/14 07:55 AM, Crusty OMO wrote:
> >>
> >> Thanks John,
> >>
> >> Andrew,
> >>
> >> That would be great if you could do a fill on the area around the
> >> regulator, or perhaps walk me through it?  The other error about pads being
> >> next to each other doesn't matter, I just over rule the computer's
> >> objection.
> >>
> >> Cheers,
> >> Josh
> >>
> >>
> >>  ------------------------------
> >> From: mon...@vitasoft.org
> >> To: n8vem...@googlegroups.com
> >> Subject: RE: [N8VEM-S100:3991] ALTAIR/IMSAI 8080 CPU replacement board
> >> Date: Thu, 5 Jun 2014 21:26:15 -0700
> >>
> >>  Josh, Andrew may be able to brush it up. He is a marvel at that these
> >> things
> >>
> >> John
> >>
> >>
> >>
> >>
> >>
> >> *From:* n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com
> >> <n8vem...@googlegroups.com>] *On Behalf Of *Crusty OMO
> >> *Sent:* Thursday, June 5, 2014 8:29 PM
> >> *To:* n8vem...@googlegroups.com
> >> *Subject:* RE: [N8VEM-S100:3990] ALTAIR/IMSAI 8080 CPU replacement board
> >>
> >>
> >>
> >> Hi John,
> >>
> >> I uploaded the board, schematic(s), gerber files and firmware file to the
> >> Wiki site.
> >> Look in
> >> Board Information, S-100 boards, S-100 ALTAIR-IMSAI 8080 CPU Board
> >>
> >> The DRC produces 2 errors which I don't know how to suppress.
> >> 1 error is a drill pad next to a mounting pad for the SD card,  I
> >> oversized the pads and they overlap.  Neither pad is an active pin or
> >> conductor, the drill is just a pilot hole to position the SD card socket,
> >> the pad is just to solder the body of the socket.
> >> The other error(s) are from a bunch of traces I dumped around the voltage
> >> regulator to act as some extra heat sink.  I should really do a "fill" in
> >> that area, but I don't know how and it's just easier for me to zig zag some
> >> wide traces to do the job.  I ignore the errors, the gerber files look good.
> >>
> >> The firmware file is just a modification of my 8080 monitor program.
> >> It's been modified to use the 8250 UART's, and it also has the start of the
> >> SPI/SD card interface.  I only got as far as receiving the 0x01 status byte
> >> from the SD card, which means it initialized successfully and I am able to
> >> talk to it.  In the weeks to come, I'll return to working on the firmware
> >> to get it to boot CP/M from the SD card.  But first, I must make some
> >> progress with my ELF projects.
> >>
> >> Cheers,
> >> Josh Bensadon
> >>
> >>
> >>
> >>   ------------------------------
> >>
> >> From: mon...@vitasoft.org
> >> To: n8vem...@googlegroups.com
> >> Subject: RE: [N8VEM-S100:3982] ALTAIR/IMSAI 8080 CPU replacement board
> >> Date: Thu, 5 Jun 2014 09:20:20 -0700
> >>
> >> Josh, great work – you must have a lot of time on your hands!
> >>
> >> Could you put me down for 2 boards.
> >>
> >> Also could you point me to the most current schematic/board diagram
> >>
> >> Thanks
> >>
> >> John
> >>
> >>
> >>
> >>
> >>
> >> *From:* n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com
> >> <n8vem...@googlegroups.com>] *On Behalf Of *Crusty OMO
> >> *Sent:* Wednesday, June 4, 2014 7:20 PM
> >> *To:* n8vem...@googlegroups.com
> >> *Subject:* RE: [N8VEM-S100:3964] ALTAIR/IMSAI 8080 CPU replacement board
> >>
> >>
> >>
> >> Hi Guys,
> >>
> >> Well I'm finally done laying out this board.  The autorouter only
> >> produced swiss cheese with over 900 via's.  It looked terrible!
> >> Anyway, I scrapped everything the autorouter did initially, and proceeded
> >> to layout the traces manually.  Once I got what I thought was all the hard
> >> parts done, I let the autorouter have another go at it.  Again it did not
> >> work out so well and it was unable to complete the board, so I proceeded to
> >> undo it's changes and/or improve it's routing manually.  I squeezed those
> >> traces in there tight, any tighter and they'll be popping off the board.
> >> Anyway, I'm working on the silkscreen layer and ready to do a run.
> >> Here's a picture of the board layout....
> >> You can see the serial port connections on the top left, SD card to the
> >> right of the 27C256 EPROM, parallel ports next to that and the ALTAIR and
> >> IMSAI front panel connectors.  There are also a few jumpers around the
> >> board to configure for CPU or Peripheral board only and ALTAIR/IMSAI mode.
> >> Firmware for the board will be my next project, but I have to make
> >> preparations for VCF-MW my priority.  Dave Ruske and I will be doing a
> >> COSMAC 1802 exhibit there in September.
> >>
> >>
> >>
> >> <mime-attachment.jpg>
> >>
> >>
> >>
> >> Cheers,
> >> Josh Bensadon
> >>
> >>
> >>
> >>
> >>  ------------------------------
> >>
> >> From: crus...@hotmail.com
> >> To: n8vem...@googlegroups.com
> >> Subject: RE: [N8VEM-S100:3711] ALTAIR/IMSAI 8080 CPU replacement board
> >> Date: Sun, 18 May 2014 00:57:20 +0000
> >>
> >> Hi Guys,
> >>
> >> Well, this project has just reached a milestone.  The hardware is tested
> >> and working.  I had some rewiring to do to make it work for the ALTAIR, I
> >> thought the ALTAIR and IMSAI front panels were (near) identical, but they
> >> are not.
> >> There are some jumpers on the board to configure between ALTAIR and IMSAI.
> >>
> >> Here's a picture of my debugging and testing setup.  The board is being
> >> tested in the ALTAIR.
> >>
> >>
> >>
> >> <mime-attachment.jpg>
> >>
> >>
> >>
> >>
> >> Now entering Phase 2... building a PCB.
> >>
> >> Cheers,
> >> Josh Bensadon
> >>  ------------------------------
> >>
> >> From: mon...@vitasoft.org
> >> To: n8vem...@googlegroups.com
> >> Subject: RE: [N8VEM-S100:3666] ALTAIR/IMSAI 8080 CPU replacement board
> >> Date: Tue, 13 May 2014 13:56:05 -0700
> >>
> >> Very nice Josh!
> >>
> >> John
> >>
> >>
> >>
> >> *From:* n8vem...@googlegroups.com [mailto:n8vem...@googlegroups.com
> >> <n8vem...@googlegroups.com>] *On Behalf Of *Crusty OMO
> >> *Sent:* Tuesday, May 13, 2014 1:19 PM
> >> *To:* n8vem...@googlegroups.com
> >> *Subject:* RE: [N8VEM-S100:3664] ALTAIR/IMSAI 8080 CPU replacement board
> >>
> >>
> >>
> >> Hi Group,
> >>
> >> Well, I'm cooking up this board at the moment.  I have all the hardware
> >> figured out to run like the original CPU boards.
> >> I need to do a little more testing of the hardware, then I'll proceed to
> >> building the boards.
> >> The Memory, I/O, UARTs and SPI interface to the SD card appear to all be
> >> working.
> >> 8K chunks of memory can become either ROM, RAM or mapped off the board.
> >>
> >> CPU: 8080A
> >> UARTS: 2x 8250
> >> RAM: 2x 32K
> >> ROM: 32K
> >> I/O: 8 input, 6 output pins
> >> SPI to SD Card interface
> >> ALTAIR & IMSAI Front Panel Connectors.
> >>
> >> Where ROM is selected in a block it overlaps the RAM on reads, but writes
> >> go through to RAM.
> >> The ROM can then be disabled and reads will come from the RAM at that
> >> location.
> >> The firmware is copying itself to RAM then switching off the ROM.
> >> The CPU can be deselected with jumpers and the board will work as RAM/ROM
> >> and I/O for another CPU on the bus.
> >>
> >> Pictures attached.  Yellow-Data, Brown-Address, Blue-I/O,
> >> Green-Control/Status & everything else.
> >>
> >> Regards,
> >> Josh Bensadon
> >>
> >>
> >>
> >>
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> >> --
> >> Don Caprio...@gmail.com
> >>
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> 
> 
> 
> -- 
> -------------------------------
> Don Caprio cap...@uxpro.com
> http://www.uxpro.com
> (925) 240-UNIX
> 
> -- 
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