[Coco] Kip's Single Board Computer
Kip Koon
computerdoc at sc.rr.com
Sat Sep 19 03:59:21 EDT 2015
Hi Dave,
The boards all sound interesting. At some point I would be interested in playing with them in my studies .
I wish I had a PT68K running. Someone was looking at getting a few of the boards built, but I know I could not afford one at this juncture. :(
Kip Koon
computerdoc at sc.rr.com
http://www.cocopedia.com/wiki/index.php/Kip_Koon
> -----Original Message-----
> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Dave Philipsen
> Sent: Saturday, September 19, 2015 2:30 AM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] Kip's Single Board Computer
>
> Oops, the 'dual port RAM' sentence below should be connected to the paragraph describing the ISA bus transmitter. I suppose if you
> were wanting to build some sort of DMX-512 controller if you were into controlling theatrical or architectural lighting there are some
> things you could do with the transmitter board. It would even work in a standalone fashion without being plugged into the PC bus if
> you wanted.
> Come to think of it maybe I'll find a use for one of these in my PT68K-4 computer when I get it up and running again with OS9 68000.
>
>
> Dave
>
> P.S. None of the boards are overly complicated. They are all 2-layer and they were built for very specific purposes.
>
>
>
> On 9/19/2015 1:23 AM, Dave Philipsen wrote:
> > I do but I'm not sure they would necessarily be of interest to you:
> >
> > A rather large board has 64 digital outputs that drive 24vdc loads. It
> > has an opto-isolated UART that receives RS422 data to control the
> > outputs. There are terminal blocks so that 24v solenoids may be wired
> > directly to the board. Parallel with the terminal blocks are to DB37
> > connectors which basically carry the same signals.
> >
> > An NTSC video overlay controller that also receives RS422 data and can
> > overlay text characters on a standard composite NTSC video signal.
> > Additionally there are some opto-isolated digital inputs and an RS232
> > port that originally controlled a pan-tilt video camera. There is at
> > least one digital output that was used to modulate an IR LED to
> > simulate an IR remote control for a video printer. A dual-port RAM
> > facilitates communication between the PC's ISA bus and the 68HC11 card.
> >
> > An ISA bus 'transmitter' card that transmits DMX-512 (theatrical
> > lighting control) and the RS422 data that controls the cards above.
> > Also included some digital inputs and outputs. The card also has a
> > dual digital potentiometer (Dallas Semi). There is a video sync
> > separator circuit on the board that allows the vertical sync from an
> > NTSC video source to trigger interrupts on the 68HC11.
> >
> > There are some other boards that also used the HC11 card but these are
> > the most prominent ones. The descriptions above are rough
> > descriptions and at least one component (for the NTSC video overlay)
> > is almost certainly no longer available.
> >
> >
> > Dave Philipsen
> >
> > On 9/19/2015 1:05 AM, Kip Koon wrote:
> >> Hi Dave,
> >> Do you have other boards that connect to the expansion connectors?
> >>
> >> Kip Koon
> >> computerdoc at sc.rr.com
> >> http://www.cocopedia.com/wiki/index.php/Kip_Koon
> >>
> >>
> >>
> >>> -----Original Message-----
> >>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Dave
> >>> Philipsen
> >>> Sent: Saturday, September 19, 2015 1:08 AM
> >>> To: CoCoList for Color Computer Enthusiasts
> >>> Subject: Re: [Coco] Kip's Single Board Computer
> >>>
> >>> Kip, would you rather build one from scratch or just get one already
> >>> built? I have a number of them already built that I could send out.
> >>> I'll try to write up a little documentation for it. I also have an
> >>> assembler and a monitor for it. For some things it can be faster
> >>> than a
> >>> 6809 because of the 4MHz speed but of course it won't do relocatable
> >>> code. If you're familiar with 6809 assembler code this will be a
> >>> cinch to pick up. Some mnemonics are a little different but more
> >>> ways similar than not.
> >>>
> >>> Dave
> >>>
> >>>
> >>> P.S. I got the Moxham board in the mail yesterday and ordered the
> >>> FPGA dev board for it. Looks pretty interesting!
> >>>
> >>>
> >>> On 2015-09-18 23:47, Kip Koon wrote:
> >>>> Hi Dave,
> >>>> I would very much like to experiment with your HC11 PCB. It looks
> >>>> very interesting. I'm currently reading a book called Microcontroller
> >>>> Technology - 68HC11 & 68HC12. It would be interesting to play with
> >>>> this board as I learn the 68HC11. I have several HC11F1 chips on hand
> >>>> I could use. Please let me know everything I need to get this PCB
> >>>> going. Thanks a bunch in advance!
> >>>>
> >>>> Kip Koon
> >>>> computerdoc at sc.rr.com
> >>>> http://www.cocopedia.com/wiki/index.php/Kip_Koon
> >>>>
> >>>>
> >>>>> -----Original Message-----
> >>>>> From: Coco [mailto:coco-bounces at maltedmedia.com] On Behalf Of Dave
> >>>>> Philipsen
> >>>>> Sent: Tuesday, September 15, 2015 2:00 PM
> >>>>> To: CoCoList for Color Computer Enthusiasts
> >>>>> Subject: Re: [Coco] Kip's Single Board Computer
> >>>>>
> >>>>> Yep, it probably will. The beauty of the 'reset' chip is that it
> >>>>> continuously monitors VCC for an out-of-range value and will put the
> >>>>> CPU
> >>>>> back in reset if it finds that. A lot of times what causes a CPU to
> >>>>> 'lock up' is some dirty supply voltage that cause the something
> >>>>> abnormal to show up on the data/address lines and then the CPU
> >>>>> takes a
> >>>>> hike to la-la land. This chip is like a power supply watchdog.
> >>>>> It also conditions a reset button input because, as you probably
> >>>>> know,
> >>>>> mechanical switches can be noisy/bouncy.
> >>>>>
> >>>>> Here's a photo of a more recent revision of the board that I did with
> >>>>> onboard 5v regulator and a power supply barrel connector. The
> >>>>> 'HC11 runs at 4 MHz bus speed, has full 16-bit external address bus,
> >>>>> buffered data lines, some decoded chip selects, internal 1K SRAM,
> >>>>> internal 512-byte EEPROM, serial port, SPI port. The board has
> >>>>> all of
> >>>>> the signals brought out to expansion connectors, the reset chip,
> >>>>> a 16 MHz oscillator, RS232 port, power LED. socket for RTC and
> >>>>> external EEPROM,
> >>>>> 27C256 EPROM socket, etc. If anyone's interested in playing around
> >>>>> with one or building it from scratch I could make up some
> >>>>> documentation for it along with a basic monitor in EPROM. I think I
> >>>>> still have quite a few bare boards floating around that I would sell
> >>>>> for cheap. And, it's a tried and tested design. As I said, I
> >>>>> produce
> >>>>> somewhere in the neighborhood of 1,000-1,500 of these and they're
> >>>>> all still running now.
> >>>>>
> >>>>> http://www.davebiz.com/HC11-new.jpg
> >>>>>
> >>>>> Dave Philipsen
> >>>>>
> >>>>>
> >>>>>
> >>>>> On , John W. Linville wrote:
> >>>>>> Well, that seems fine. But I think a simple capacitor will do the
> >>>>>> job... :-)
> >>>>>>
> >>>>>> John
> >>>>>>
> >>>>>> On Tue, Sep 15, 2015 at 12:34:59PM -0500, Dave Philipsen wrote:
> >>>>>>> So I just sent Jim an offer to send a couple of DS1233-10
> >>>>>>> chips. The
> >>>>>>> chip basically holds a CPU in reset for 350ms after the power
> >>>>>>> supply
> >>>>>>> comes up and is stable. I have used probably 1,500-2,000 of these
> >>>>>>> over the years in a little 68HC11 board I designed about 20 years
> >>>>>>> ago:
> >>>>>>>
> >>>>>>> http://www.davebiz.com/HC11.jpg
> >>>>>>>
> >>>>>>> You can see the DS1233-10 in the upper left corner of the board
> >>>>>>> next
> >>>>>>> to the oscillator chip.
> >>>>>>>
> >>>>>>> Dave
> >>>>>>>
> >>>>>>>
> >>>>>>> On , John W. Linville wrote:
> >>>>>>>> On Tue, Sep 15, 2015 at 12:06:04PM -0500, RETRO Innovations wrote:
> >>>>>>>>> On 9/15/2015 11:49 AM, John W. Linville wrote:
> >>>>>>>>>> On Tue, Sep 15, 2015 at 12:15:15PM -0400, RETRO Innovations
> >>>>>>>>>> wrote:
> >>>>>>>>>>> The new board, as it were (it's getting less new by the
> >>>>>>>>>>> month) is Kip's
> >>>>>>>>>>> take on Searle's 6 IC 6809. His is 8, and offers some
> >>>>>>>>>>> interesting
> >>>>>>>>>>> enhancement options.
> >>>>>>>>>>>
> >>>>>>>>>>> But, when I try to bring the board up, I'm struggling:
> >>>>>>>>>>>
> >>>>>>>>>>> * there is no signal on Q or E.
> >>>>>>>>>>> * Nothing of interest on the crystal pins (though my
> >>>>>>>>>>> Tek could be
> >>>>>>>>>>> interfering with the feedback).
> >>>>>>>>>>> * I took the CPU off the board, breadboarded with HALT
> >>>>>>>>>>> and RESET
> >>>>>>>>>>> high, crystal and caps installed, and still no Q or
> >>>>>>>>>>> E. I tried a
> >>>>>>>>>>> known working 6809 from my SuperPET, and nothing.
> >>>>>>>>>>>
> >>>>>>>>>>> I'm new to 6809/6309, so I am not sure where to start.
> >>>>>>>>>>> I am sure once
> >>>>>>>>>>> I get the CPU running, the rest will be quick work, but
> >>>>>>>>>>> the fact that I
> >>>>>>>>>>> can't seem to get a 6809 by itself to generate Q and E
> >>>>>>>>>>> bothers me and
> >>>>>>>>>>> lowers my confidence that the board is ready to be
> >>>>>>>>>>> debugged.
> >>>>>>>>>>>
> >>>>>>>>>>> Kip, send the man a board. I'll buy it for him.
> >>>>>>>>>>>
> >>>>>>>>>>> Jim
> >>>>>>>>>> I'm fairly certain that the clock problem is caused by the
> >>>>>>>>>> lack of
> >>>>>>>>>> RC circuit on the RESET^ line, as I described in my earlier
> >>>>>>>>>> note...do I get a board too? :-)
> >>>>>>>>>>
> >>>>>>>>>> John
> >>>>>>>>> Happy to buy you one. My time is precious, and saving 2-3
> >>>>>>>>> hours on
> >>>>>>>>> the bench is worth quite a bit at this stage in my life.
> >>>>>>>>>
> >>>>>>>>> So, for the 6809 noob, is there a data sheet page I should
> >>>>>>>>> reference for the correct cap/resistor values?
> >>>>>>>> So, the RESET^ reference on page 6 points to Figure 7 (which is on
> >>>>>>>> page 8). There it refers to the initial low time as "tRC".
> >>>>>>>>
> >>>>>>>> Near the bottom of the chart in Figure 1 (on page 3) it shows a
> >>>>>>>> maximum value for tRC as 100mS. Oddly, no minimum is listed.
> >>>>>>>>
> >>>>>>>> Referring to the Simon6809 schematic, it looks like he is using
> >>>>>>>> an R
> >>>>>>>> of 10Kohm and a C of 10uF. That should put you right at that
> >>>>>>>> 100mS
> >>>>>>>> "maximum", but it works fine.
> >>>>>>>>
> >>>>>>>> Anyway, I would suggest something approaching 100mS. Since Kip
> >>>>>>>> seems to have a 2.2Kohm pull-up on RESET^, maybe a 47uF capacitor
> >>>>>>> >from there to ground? Of course, that ignores the R10 and LED
> >>>>>>>> path...you may have to try some different cap values if that
> >>>>>>>> doesn't work...
> >>>>>>>>
> >>>>>>>>> I remember the reset controller from my 68hc11 days. Man,
> >>>>>>>>> Motorola
> >>>>>>>>> was picky on reset.
> >>>>>>>> :-)
> >>>>>>>>
> >>>>>>>> John
> >>>>>>>> --
> >>>>>>>> John W. Linville Someday the world will need a hero, and
> >>>>>>>> you
> >>>>>>>> linville at tuxdriver.com might be all we have. Be ready.
> >>>>>>> --
> >>>>>>> Coco mailing list
> >>>>>>> Coco at maltedmedia.com
> >>>>>>> https://pairlist5.pair.net/mailman/listinfo/coco
> >>>>>> --
> >>>>>> John W. Linville Someday the world will need a hero, and you
> >>>>>> linville at tuxdriver.com might be all we have. Be ready.
> >>>>> --
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> >
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