[Coco] CocoMIDI and Other Boards Available

Jayeson Lee-Steere cocolistemail at titaniumstudios.com
Fri Aug 19 11:30:58 EDT 2016

This card is very easy to program for. Allen Huffman wrote some rather good
documentation quite some time ago:

It should probably be noted that the 5 PIN din MIDI connectors are still in
use. As a quick sample, I checked Roland's MIDI keyboard controllers and
they have both USB and DIN connectors.



On Fri, Aug 19, 2016 at 9:56 PM, Robert Hermanek <rhermanek at centurytel.net>

> These look very nice.  If I were to purchase one, it would be to connect
> physical midi devices via 5-pin in/out/through as in the good ol' days, and
> I'd be interested in writing my own code to handle midi.  Do you have
> documentation for these, explaining any on-board config, as well as
> register operation/etc, for those of us who never messed with coco midi
> back in the day?
> Thanks
> -RobertH
> On 8/18/2016 4:26 AM, Jayeson Lee-Steere wrote:
>> For those not on Facebook:
>> CocoMIDI 2016 boards are finally available! These follow the de facto Coco
>> MIDI standard used by the original Rulaford, Glenside, etc. MIDI
>> cartridges. They ended up being more expensive to build than my initial
>> estimates. There are a few options available.
>> John Strong is designing a case - current work-in-progress is looking
>> great. Please purchase case(s) directly from him when available.
>> I also have the pictured Coco 1 E-Board Solderless 64k Circuit boards.
>> These allow the Coco 1 E board machines to address the full 64k.
>> Previously
>> this involved soldering an (IMO) ugly mess wires. You still need to supply
>> 8 4164 DRAM chips. The color of the attached jumper wire varies - if you
>> have a prefer please request a color and I will try to accommodate.
>> I may be able to ship the Coco 2 SRAM boards right now, subject to testing
>> this updated board design. These 64k boards are for later Coco 2 models
>> which have the two white header sockets for a RAM board. The board does
>> not
>> require any soldering but a single wire jumper does need to be soldered
>> onto the Coco main board. A pre-shaped wire jumper and a short length of
>> solder included. You'll need tweezers/fine tipped pliers, a soldering iron
>> and a helping hand to solder the jumper.
>> Pricing follows. All prices are in US$. If you are in Australia, I will
>> convert to AU$ and add GST. Some options are very limited quantities -
>> Michael Brant​, Randy Weaver​, Ed Orbea​, Anthony Mori​ and André
>> Ballista​
>> are first in line. Please message me for a total - I check for message
>> requests often. Payment will be via Paypal.
>> Fully assembled and tested CocoMIDI 2016 rev 1.1 board with standard 6850
>> UART.  (Boards on left of first photo). Ignore the unpopulated chip
>> sockets
>> on some of the boards in the photos - all board options come complete and
>> tested. As mentioned above, no case is supplied. $79
>> Fully assembled and tested CocoMIDI 2016 rev 1.0 board with standard 6850
>> UART. (Board on bottom right of first photo, and in second photo). This
>> earlier board revision has a number of patches on the bottom side. The
>> wire
>> patches are soldered into the board through-holes, so are very solid.
>> These
>> are functionally identical to the rev 1.1 boards, other than the lack of a
>> front set of mounting holes. I'm not sure John Strong's case will even use
>> these holes. $74.
>> Upgrade UART to 68B50. The 68B50 are rated for 2MHz operation so Coco 3
>> users may wish to choose this option. I am uncertain if any Coco MIDI
>> software accesses the MIDI port with the Coco running at 2MHz - there is
>> no
>> need in assembly language and the earlier MIDI devices do not specify a
>> 2MHz part. If you plan on writing a BASIC MIDI program on your Coco 2,
>> then
>> this option will allow you to use the high speed poke with confidence. Add
>> $9. Fourteen only, then they are gone.
>> Upgrade UART to new-old-stock, ceramic/gold, Soviet 6850 clone. Add $19.
>> Two only, then they are gone. I quite like these, so grab them quick
>> before
>> I change my mind about selling them.
>> Buy two or more CocoMIDI 2016 boards at once. Save $10 per board.
>> E-board 64k Circuit board. $15
>> 64k SRAM board for late model Coco 2: $18
>> Postage is from Australia. As an example, postage and packaging to the USA
>> starts at $13.50 and typically delivers within 2 weeks.
>> Please note that the boards are hand-assembled in small quantities and may
>> have minor cosmetic flaws. If you are unsatisfied for any reason, send
>> back
>>   boards within 15 days of receipt for a full refund (less shipping).
>> Cheers,
>> Jayeson
>> https://drive.google.com/file/d/0B_lZwDmP8D1aZjJEczNCQ2JmbkU
>> /view?usp=sharing
>> https://drive.google.com/file/d/0B_lZwDmP8D1aMmxDdmNZYUJFS2M
>> /view?usp=sharing
> --
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