Mark J. Blair | 27 Jul 20:41 2016

WTB Orchestra 90 cartridge

I'm interested in acquiring an Orchestra 90 cartridge for my CoCos. I'm looking for a non-eBay source. Does
anybody have an extra one for sale or trade?

Mark J. Blair, NF6X <nf6x <at>>


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Brett Gordon | 25 Jul 05:16 2016

Re: IP packets on my coco

Ok. This weekend I tore the up-to-date uIP tcp/ip stack out of contiki.
It's nearly the same as the old uIP.   I modified my lwwire server connect
up a TAP interface, rather TUN.  TAP basically gets and puts ethernet
frames, rather than TUN, which works with straight IP packets.   So I guess
my CoCo has a MAC address now.   A TAP interface takes data in nearly the
same format (eth frames) as Jim's prototype cs8900a NIC card.  I hope this
means it will be easy(er) to test the real hardware.

root <at> lappy:/home/beretta# ping
PING ( 56(84) bytes of data.
64 bytes from icmp_req=1 ttl=64 time=298 ms
64 bytes from icmp_req=2 ttl=64 time=197 ms
64 bytes from icmp_req=3 ttl=64 time=97.8 ms
64 bytes from icmp_req=4 ttl=64 time=297 ms
64 bytes from icmp_req=5 ttl=64 time=197 ms
64 bytes from icmp_req=6 ttl=64 time=97.2 ms
64 bytes from icmp_req=7 ttl=64 time=297 ms
64 bytes from icmp_req=8 ttl=64 time=196 ms
64 bytes from icmp_req=9 ttl=64 time=96.3 ms
64 bytes from icmp_req=10 ttl=64 time=295 ms
64 bytes from icmp_req=11 ttl=64 time=195 ms
64 bytes from icmp_req=12 ttl=64 time=94.2 ms
--- ping statistics ---
12 packets transmitted, 12 received, 0% packet loss, time 11015ms
rtt min/avg/max/mdev = 94.291/196.860/298.744/82.017 ms
root <at> lappy:/home/beretta# telnet 80
Connected to
Escape character is '^]'.
(Continue reading)


Dorsett Educational Tapes


I have reviewed one of the Dorsett Educational tapes on Tomas Edison.
It should be a mono (not stereo) file.  The data and the voice/audio is on
the same track.  Apparently no special hardware was required to read this
file, when it was new.  The program can use motor on/off and audio on/off to
prevent the data portion for playing out the speaker.

The XRoar emulator can load a digital audio file, such as a wave file.

The file has too much noise and/or too little signal strength.
I think the file uses Frequency-Shift Keying for modulation of the data.  I
think the CoCo makes one sine wave cycle for each bit.  I think the CoCo
hardware measures the time between zero-crossings in order to demodulate the
audio stream.  Does this should correct?

If I could make a 7Hz band pass software digital filter for each of the
frequencies of interest then I could clean up the files.
Perhaps a software Schmitt trigger like comparator could be used to clean up
the zero crossing and make the files readable again.  Any thoughts on these

-John Mark Mobley


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Chad H | 25 Jul 04:05 2016

Androne game --> Movie!?

Well this may be old news to some of you, but first I've heard of a movie that sounds too much like the game to be a
coincidence.  I didn't realize the Androne concept existed outside the CoCo platform.  I thought it was
made by Robert Arnestein for Tandy and  for CoCo's only.

Game info:


This tripped me out.  Yes there are differences, but the similarities with the 'mazes' and such are uncanny.

- Chad H


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Tormod Volden | 24 Jul 10:00 2016

Vintage Computer Festival Europe in Zurich 19-20 Nov 2016

On behalf of the organizing team I am happy to announce that the third
VCFe-CH (Vintage Computer Festival Europe in Switzerland) will take
place in Zurich 19-20 November 2016. For more information please see
the web site at

There will for sure be some CoCos and Dragons on display, and many
interesting talks.

Best regards,


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David Ladd | 23 Jul 20:34 2016

[COCO] [MM1] Gold Runner 2000

Anyone know if *Eric Crichlow is still * around and if so does he have a
page to still acquire his MM/1 version of the Gold Runner 2000?

|David Ladd|


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[Color Computer] FYI: Floppy Disk Controller Chips

Floppy Disk Controller Chips



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Ronivon Costa | 21 Jul 08:14 2016

Drivewire Mac OS X

Hi everyone.

Anyone using Drivewire on Mac?
I download and tried to build the project for github but it is not building:

#import <TeeBoy/TBLog.h> file not found.

There is no documentation on the project´s directory, so wondering if
someone built this, had this issue?




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Andrew | 21 Jul 02:26 2016

Re: Project Sneak Peek

What is the entire purpose of the ATMega328 on the board? Is it what 
controls the PWM (it's more than capable) - or does it serve some other 
purpose (perhaps as a controller or something between the other IC and 
the RAM)?

If it does control the PWM, how much control is allowed (short of 
re-writing the firmware on the 328 - which I am sure someone will do)? 
I'm just imagining something akin to the sound synth software that was a 
part of the Craft demo (which used a chip very similar to the 328, and 
essentially simulated a SID).

Even if all that were possible were to pull small wav/envelope samples 
off the SD card (or upload from the coco) and play back multiple voices 
(3 or 4) mixed together - that would be an excellent upgrade for the 
sound. Anything that didn't hog the CPU.

Andrew L. Ayers
Glendale, Arizona


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Pere | 20 Jul 15:43 2016

Re: Orchestra90-Dragon NEW version

Hello Barry,
I have tried to answer to your private e-mail but my messages
get always a warning that they are delayed and maybe not sent ...
So, I prefer to copy here my last answer about the files that don't
score correct on Orchestra90.
Hello Barry,
I am sorry you cannot use these disks ...
You could 'repair' the scores that give problems when you
press the 'S' (score command).
If you press 'E' (edit command) the text changes color and
the cursor goes to the 'wrong' character.
Usually these errors arise because the score was not written
for Orchestra-90 but for Piano-85 or similar ...
There are THREE kind of errors that can be solved:
1) If the cursor goes next to a chars combination that reads like
"JATx" being x a number, you just ERASE the FOUR chars
This is done having the cursor at the first char (J) and pressing
at the same time Shift and Left Arrow (once for every char)
2) If cursor goes to a 'L' char or at the char at its right, you just
have to delete both. I mean EVERYTIME you see a letter 'L'
you can be sure it is an error and have to delete it, but remember
you MUST always delete two chars, the L and next one!
3) Finally you will find errors because converting the score to
Orchestra, the comments were longer than 32 chars and the text
uses more tan one line and the second one is not commented.
In this case, create a space (Shift + right arrow) and put a '/'
on the first char on the left.

Whith these tricks you will recover all of the scores that were
(Continue reading)

RETRO Innovations | 18 Jul 08:15 2016

More sneak peeks

Brent, you ready for one?

RETRO Innovations, Contemporary Gear for Classic Systems


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