[Coco] CocoMIDI and Other Boards Available
cocolistemail at titaniumstudios.com
Thu Aug 18 05:26:54 EDT 2016
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).
More information about the Coco