Re: Re: ROM 901225-01 and CBM-II series

From: André Fachat (afachat_at_gmx.de)
Date: 2006-07-26 08:36:22

Hi,

IIRC the CBM700 uses a 6545 CRTC, and the character set is 
hardwired in the schematics, so you can not modify the 
charset.

André

Von: William Levak <wlevak@sdf.lonestar.org>
> On Tue, 25 Jul 2006, Anders Carlsson wrote:
> > Would the application software (that I don't have) somehow utilize the
> > character ROM in the cartridge as a copy protection? That is my best
> > guess, and that Commodore/Handic used a ROM chip they had plenty of.
> 
> That is a possibility, but I can think of others:
> 
> The cartridge could work in a mode where the onboard character set is 
> swithched out, in which case it would need to supply another character 
> set.

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