What sets the Tandy Color Computer line apart from all other micros is not on the graphics department, not on the sound department but in the Operating System department, namely Microware's OS9, a Real Time OS... as hard as many would find that statement to be true considering an 8 bit platform for such an environment.
OS9 really took off when the Color Computer 3 was released. With the enhanced RAM capabilities the OS found a place to breathe at ease, this could be done in a 64K CoCo with OS9 Level 1 but in a limited and carefully administered fashion.
Here I connected my Model 200 through a null modem link to my 512k CoCo 3 equipped with an RS232 pak (slot 3 of the Multi Pak Interface) and recognized by OS9 as terminal /T3. The link is set at 9600 baud. The 200 acts as a window into the system, while one user is working on it, another could be doing something else on the CoCo 3 itself... pre-emptive multitasking :-)
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