[Coco] 512K EEPROM...or 4MB!!?

[Barry Nelson]

I would be interested in writing software for such a cartridge. I have written the communications program XCOM9 for OS-9, the HDBACK backup program for HDBDOS, and the SDC utility for the CoCo SDC cartridge (based off of the sdrive program) to change the mounted image on the CoCo SDC under OS-9 as well as many other programs for the CoCo in both BASIC and Assembly.

> RETRO Innovations go4retro at go4retro.com 
> Wed Dec 9 00:46:09 EST 2015
> 
> Though it was not available to demo at the Coco show in 2015, I have on
> my bench a prototype 8MB Flash Cart, offering the following features:
> 
>   * it can be programmed by the Coco (1/2/3)
>   * It can hide the registers, and unhide them.
>   * The base address of the registers can be changed by the Coco
>   * It supports mapping any 2kB region of the flash cart into the Coco
>     cartridge address space
>   * I believe it supports up to 32kB address space, but I am not 100%
>     sure I have the logic correct for that (it would work, I just have
>     not tested it)
>   * It offers 2 momentary switches that can be read under software control
>   * It supports a single LED that can be software controlled
>   * It fits in a small Coco cartridge case
>   * It is licensed under CC3.0 license
>   * Can be produced pretty cheaply (under $50 for sure)
> 
> Obviously, it lacks a nice programmer utility, which is where the 
> project basically stopped.  It's viable and cheap, but does require 
> software development to be useful.  I currently do not have the time to 
> write such a utility, but I have two units and am happy to send them to 
> interested individuals who are capable of writing said applications 
> (needs a menu and a programmer app).  I can provide any technical 
> support on how to program, but my 6809 ASM and even my Coco BASIC 
> prowess is limited.
> 
> Not trying to rain on your parade, but thought I should lay my card(s) 
> on the table.
> 
> Jim