[Coco] [Color Computer] WordPak RS/CO80

[jdaggett at gate.net]

Boisy

Doing some more internet searching, I came across a web page 
that is about an 80 column card for the Sharp MZ-700 that is based 
on the Synertek SY6545 Chip.

>From what I gather this is the prodedure this

1) Write to location to set R18 and R19 with the video address
2) Write to location of the data latch
3)Write to I/O and register 31.

The write to register 31 tells the CRTC that the update address in 
R18 and R19 is valid. 

here the link

http://www.sharpmz.org/mz-700/80zkup.htm

james

On 6 Jan 2005 at 12:26, Boisy G. Pitre wrote:

From:           	"Boisy G. Pitre" <boisy at boisypitre.com>
Subject:        	Re: [Coco] [Color Computer] WordPak 
RS/CO80
Date sent:      	Thu, 6 Jan 2005 12:26:42 -0600
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> James,
> 
> Thanks for the information.  It sheds some light, but I am still
> uncertain where I write the actual character.  R18 and R19 tell the
> 6545 which way to set the address lines to the RAM, but now I need to
> know how to get the character into the RAM chip itself.
> 
> Boisy