[Coco] External CHAR ROM for 6847

Phill Harvey-Smith afra at ramoth.org.uk
Thu Nov 21 04:39:16 EST 2024


On 21/11/2024 04:38, Bruce Borer via Coco wrote:
> 2.) Replace the ROM with a larger Flash chip and program it with
> several images that you can select. This is simpler
> but does not allow changing the image in-circuit but would allow
> several images to select.  The selection could be done
> by switches or a latch that can be selected with firmware.

This is essentially what the Dragon 200e did (except with a single 
font), to allow Spanish characters on that machine.

John Whitworth extended this with a dip switch and multiple fonts :

https://dragonpluselectronics.com/dragon-200e-lower-case-daughterboard/

Cheers.

Phill.


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