[Coco] Writing a virtual GPU / FPU device.

[Walter Zambotti]

Thanks Bill 

Much appreciated. 

Walter 

Sent from my Xperia by Sony smartphone

---- Bill Pierce via Coco wrote ----

>This is a file I got from somewhere a few years ago. It has since been updated but not recently. All of the newer devices need to be added like CocoSDC, Mega MultiPak, GameMaster etc.
>If you update it, send me a copy so I can update mine.
>The document is in MS Word "doc" format which can be read by many open source readers and editors.
> 
>http://yaccs.info/BPIERCECOCO/Stuff/Coco_Registered_Port_Addresses_and_Devices.doc
>
>B.Pierce
> 
> 
>-----Original Message-----
>From: Walter Zambotti <zambotti at iinet.net.au>
>To: 'CoCoList for Color Computer Enthusiasts' <coco at maltedmedia.com>
>Sent: Thu, May 23, 2019 12:32 am
>Subject: [Coco] Writing a virtual GPU / FPU device.
>
>I kind of have exposure to virtual devices via the OVCC project that allowed
>me to investigate how the dynanmic device modules are designed.
>
> 
>
>Now I would like to create my own GPU / FPU device.
>
> 
>
>I would like to know how device designers chose the memory addresses to
>where the device maps its registers.
>
> 
>
>Of course I don't want to conflict with any other devices!
>
> 
>
>Is there a list of memory addresses used by all other devices?
>
> 
>
>The Tandy CoCo Service manual provides all the standard device mappings but
>what about third party?
>
> 
>
>Walter
>
>
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