[Coco] collecting info for converter

RJRTTY at aol.com RJRTTY at aol.com
Wed Feb 8 19:50:59 EST 2006

In a message dated 2/8/06 5:28:10 P.M. Eastern Standard Time,  
gene.heskett at verizon.net writes:
>Let me jump in here and add that 
>the h&V sync signals on this port, will 
>if terminated,  cause the agnus to
> shut down to protect its output 
>drivers.  Thats why  nearly every cable
> ever made had a chip, sometimes 
>even a cmos chip, buried  in the hood
> of that db25 connector, whose job 
>it was to buffer those  2 or 3 signals.

>I was amazed to find this when I bought
> my first 2000 used off an amiga 
>mailing list and found  that it came with a 
>commie genlock board in it 
>because it could drive a  monitor.  
>An email to Dave Haney confirmed my 
>agnus shutdown deduction  FWIW.  I assume 
>the seller had put it in when 
>he found he couldn't drive a  normal monitor
> (some non commie model I 
>suppose) with the regular db25  cable
> attached.  So I made one up using 
>a TTL chip  buffer/invertor and put it into 
>mine, and ran w/o the 
>genlock card 
actually my converter already buffers those lines with
a TTL inverter/buffer chip.

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