[Coco] Tandy Assembly Exhibit: CocoMEM

[Brett Gordon]

very cool Jim. What's a tasklet?

On Oct 4, 2017 8:15 PM, "RETRO Innovations" <go4retro at go4retro.com> wrote:

> The CocoMEM memory expansion system for the Color Computer 3 comprises a
> single circuit board that plugs into the Coco3 GIME socket, with the GIME
> IC plugged into the CocoMEM circuit board.This allows the circuit board to
> capture all signals needed for complete MMU functionality without requiring
> any irreversible modification to the Coco3.To remove, simply remove CocoMEM
> and replace the GIME in the original socket.Existing memory in the Coco3
> can be left in place (feel free to remove if desired), and no capacitors
> must be clipped or otherwise removed.No additional installation effort is
> required.
>
> The CocoMEM design supports the following features:
>
>  * Hardware support for 64 MB of system RAM (test units have 4MB installed)
>  * 16 bit task registers
>  * Dual MMU support (Separate registers for video MMU and CPU MMU)
>  * Map video MMU registers to any 512kB bank in memory
>  * Support for 32 CPU MMU tasks, each with their own set of task registers
>  * Support for 256 CPU MMU “tasklets” per task, each with their own set
>    of task registers
>  * 512kB “emulation” mode (on Barry Nelson’s request)
>  * NoCan3 $ff9b bank register support
>
>  Additional immediately planned features:
>
>  * Per task bank write protect capability
>  * Per task bank CPU read interrupt
>  * Per task bank CPU write interrupt
>  * Map any GIME MMU register to any 8K bank in memory, no 512kB segment
>    restriction
>
> http://www.go4retro.com/products/cocomem/
>
> Jim
>
> --
> RETRO Innovations, Contemporary Gear for Classic Systems
> www.go4retro.com
> store.go4retro.com
>
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> https://pairlist5.pair.net/mailman/listinfo/coco
>