[Coco] Grant Searles SBC

[Zippster]

But you are getting garbage?  More than just a glitchy char or three?   

Link to the circuit?  Not even sure what chips are involved.

- Ed


> On May 6, 2015, at 6:16 PM, Bill Nobel <b_nobel at hotmail.com> wrote:
> 
> Hi guys.  This is a shout out to the Hardware Experts out there.  I am trying to build this unit on a breadboard and am having some issues.  I am following the circuit to a tee.  Powering up I get 1.843 mhz on the E & Q lines R/W is working.  But sometimes when I hit reset my BA line goes high throwing CPU into HALT state even though my HALT is tied High.  Also on the terminal window I am getting nothing but garbage @ 115200 baud.  The one difference to the circuit I am using a FTDI instead of the 9 pin serial plug.  I verified the FTDI by connecting to a old desktop pc using Hyperterm so the chip is working.  But on the SBC I get nothing.  I even went to the extent of swapping out all the chips and verified by hand the Eprom code to see if it Burned properly.
> 
> Any suggestions or help would be appreciated.
> 
> Bill Nobel
> 
> 
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