Re: 6845 versus 6545

From: William Levak (wlevak_at_cyberspace.org)
Date: 2001-03-22 05:21:52

On Wed, 21 Mar 101 g.baltissen@hccnet.nl wrote:

> Hallo,
> 
> I heard that the 6545 is not compatible with the 6845. But a long time ago 
> I exchanged a 6845 with an faulty 6545 and the cbm worked again. Later 
> swaps dibn't work. As I haven't this board anymore, I don't know for sure 
> what 6845 I used but I thought an old original Motorola one.

I have had the same experience.  I have even seen some CBM's come from
Commodore with a 6845 in them.  The 6845 has had a long run.  There have
been many variations through the years, only some are compatible enough to
work in the CBM.  The version that was current when the 80 column CBM
first came out seems to be compatible.  I have tried earlier and later
versions and they are not compatible.  I don't know the exact range of
versions that are compatible.

P.S.
The Hitachi HD46505 is also compatible.

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