[Coco] 64K Memory Test Program

[Boisy G. Pitre]

Thanks for the confirmation Rogelio. I’ve spotted the sucker now.

This CoCo is certainly eligible to be put to work in some embedded task or as a NitrOS-9 server via DriveWire. The fact that it can run at 57.6Kbps now with the op-amp replacement is pretty cool. 

Gotta get packed. Leaving tomorrow for VCF NE and then Boston next week, then the CoCoFEST!

> On Apr 15, 2015, at 4:15 PM, Rogelio Perea <os9dude at gmail.com> wrote:
> 
> On Wed Apr 15 2015, Boisy Pitre wrote:
> 
> One thing that is puzzling… this is an E board CoCo 1. I cannot for the
>> life of me find the cassette relay on the board. No clicking sound is made
>> when togging the relay with MOTORON or MOTOROFF.
>> 
> 
> The early CoCo's (C, D & E rev) had reed relays, it is located near the
> ports, looks like an elongated candy piece.
> 
> Those reed relays suffered (like all of their kind) of a minor annoyance
> than on heavier loads than rated the contacts would "fuse" together
> rendering the relay useless for any switching capacity. The F board came
> with the more capable mechanical relay... the reassuring click :-)
> 
> The reed would fail if the recorder connected to the CoCo happened to have
> its motor draw more inrush current than the relay could manage safely,
> known to happen with off brand recorders.
> 
> -- RP
> 
> -- 
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco