[Coco] Coco ProtoType Board

[jdaggett at gate.net]

All that are interested:

Based on replies a consensus is as follows:

1) the board should be 3U Euro card size, ~ 4" x 6"

2) some form of flexible address decoding included along with buffering. It is still 
unclear as to whether just the Coco 3 I/O range be flexible or also the range from 
$C000 to $FFDF also be included. 

3) both bare boards and built boards offered.

4) power and ground buss available in prototyping area

5) prototyping area should be through hole design to accommodate DIP packaged 
ICs and sockets. Address and data buffers can be surface mount.


This seems pretty much to what I gather is a godd general consensus of what the 
community would like. The oly stumbling block that I see is how to do the address 
decodig and buffering. I am more inclined to use a PLD of some form over 
discrete ICs. While discrete ICs might be a lower cost, one 100 pin TQFP 
package will probably have less area and thus more for prototyping area. 

If this seems to be what the commu nity wants I can start design this weekend 
and should have a first pass of a proto board for review by mid week. If t here is 
favorable reaction then I can send off for boards by the weeks end. Finished 
product could be available by the later part of the month. 

Once a design is accepted then a more in depth detail as to what the finished cost  
will be .


james